Dayakar Penumadu

Fred N. Peebles Professor and IAMM Chair of Excellence

Biography

Penumadu has been a faculty member in the Department of Civil & Environmental Engineering at the University of Tennessee, Knoxville (UT) since fall 2001. He currently holds Fred N. Peebles professorship and the Institute for Advanced Materials and Manufacturing (IAMM) Chair of Excellence position, joint with Oak Ridge National Laboratory.

He served as the Head of the Department of Civil and Environmental Engineering from 2007 to 2014. Prior to joining UT, he was a faculty member at Clarkson University for 8 years.

Research

Carbon fiber reinforced polymeric composites and sandwich structures, environmental degradation, and multi-scale mechanics. Multi-axial stress-strain-time behavior of multi-phase and granular materials. Non-invasive characterization and residual stress using neutron and x-ray tomography and diffraction. Direct Numerical Simulations and Porous Media.

Education

PhD from Georgia Institute of Technology
MS from University of Kentucky and Purdue University
BS from Birla Institute of Technology and Science, Pilani, India

Publications

Tran, K. V., Woracek, R., Kardjilov, N., Markötter, H., Abou-Ras, D., Puplampu, S., . . . Manke, I. (2022). Torsion of a rectangular bar: Complex phase distribution in 304L steel revealed by neutron tomography. Materials and Design, 222. doi:10.1016/j.matdes.2022.111037

Puplampu, S. B., Penumadu, D., Frost, M., & An, K. (n.d.). Neutron Diffraction Measurements Of Forged Ti‐6A‐4V Alloy Under Tensile Loading. Advanced Engineering Materials. doi:10.1002/adem.202200793

Young, S., Penumadu, D., Patchen, A. D., Laggis, G., Michaud, J., Bradley, A., . . . Davis, M. (2022). Smart Polymer Composite Deck Monitoring Using Distributed High Definition and Bragg Grating Fiber Optic Sensing. SENSORS, 22(11), 28 pages. doi:10.3390/s22114089

Vaidya, U., Hiremath, N., Spencer, R., Young, S., Penumadu, D., Mainka, H., . . . Hassen, A. (2022). Manufacturing Demonstration of Automotive Seat Backrest Using Sheet Molding Compound and Overmolding with Continuous Reinforcement. APPLIED COMPOSITE MATERIALS, 29(3), 1367-1391. doi:10.1007/s10443-022-10019-2

Thakur, M. M., & Penumadu, D. (2022). Capillary suction predictions in granular materials subjected to 1D compression and triaxial loading with emphasis on projectile penetration. AIP Advances, 12(2). doi:10.1063/5.0072195

Barnett, P. R., Cook, Z. A., Hulett, B. M., Varma, N. H., & Penumadu, D. (2022). Influence of processing parameters on permeability and infiltration of compression molded discontinuous carbon fiber organosheet composites. Composites Part A: Applied Science and Manufacturing, 152. doi:10.1016/j.compositesa.2021.106682

Arwood, Z., Young, S., & Penumadu, D. (2022). Infusible thermoplastic resin based sandwich structures for wind blade applications and the influence of scrim on facesheet to core interface debonding. Journal of Sandwich Structures and Materials. doi:10.1177/10996362221125876

Smith, Z. J., Barsoum, D. R., Arwood, Z. L., Penumadu, D., & Advincula, R. C. (2022). Characterization of micro-sandwich structures via direct ink writing epoxy based cores. JOURNAL OF SANDWICH STRUCTURES & MATERIALS, 16 pages. doi:10.1177/10996362221118329

Thakur, M. M., & Penumadu, D. (2021). Influence of Friction and Particle Morphology on Triaxial Shearing of Granular Materials. Journal of Geotechnical and Geoenvironmental Engineering, 147(11). doi:10.1061/(ASCE)GT.1943-5606.0002634

Penumadu, D., Chin, J. -C., Young, S., Ignatz-Hoover, F., Floyd, T., & Chapman, P. (2021). SULFUR DISPERSION QUANTITATIVE ANALYSIS IN ELASTOMERIC TIRE FORMULATIONS BY USING HIGH RESOLUTION X-RAY COMPUTED TOMOGRAPHY. Rubber Chemistry and Technology, 94(4), 626-641. doi:10.5254/rct.21.79997

Puplampu, S. B., Siriruk, A., Sharma, A., & Penumadu, D. (2021). Stress-strain and microscopy data for fire-damaged aluminum alloy 6061 subjected to multiaxial loading. Data in Brief, 38. doi:10.1016/j.dib.2021.107275

Barnett, P. R., Young, S. A., Chawla, V., Foster, D. M., & Penumadu, D. (2021). Thermo-mechanical characterization of discontinuous recycled/repurposed carbon fiber reinforced thermoplastic organosheet composites. Journal of Composite Materials, 55(24), 3409-3423. doi:10.1177/00219983211015721

Barnett, P. R., Hulett, B. M., & Penumadu, D. (2021). Crashworthiness of recycled carbon fiber composites. Composite Structures, 272. doi:10.1016/j.compstruct.2021.114232

Puplampu, S. B., Siriruk, A., Sharma, A., & Penumadu, D. (2021). Multiaxial deformation behavior of aluminum alloy 6061 subjected to fire damage. Mechanics of Materials, 159. doi:10.1016/j.mechmat.2021.103885

Barnett, P. R., Young, S. A., Patel, N. J., & Penumadu, D. (2021). Prediction of strength and modulus of discontinuous carbon fiber composites considering stochastic microstructure. Composites Science and Technology, 211. doi:10.1016/j.compscitech.2021.108857

Thakur, M. M., Kim, F., Penumadu, D., & Herring, A. (2021). Pore Space and Fluid Phase Characterization in Round and Angular Partially Saturated Sands Using Radiation-Based Tomography and Persistent Homology (vol 137, pg 131, 2021). TRANSPORT IN POROUS MEDIA, 138(3), 693. doi:10.1007/s11242-021-01630-1

Meek, N., & Penumadu, D. (2021). Nonlinear elastic response of pan based carbon fiber to tensile loading and relations to microstructure. Carbon, 178, 133-143. doi:10.1016/j.carbon.2021.03.012

Sharma, A., Leib-Day, A. R., Thakur, M. M., & Penumadu, D. (2021). Effect of Particle Morphology on Stiffness, Strength and Volumetric Behavior of Rounded and Angular Natural Sand. MATERIALS, 14(11), 21 pages. doi:10.3390/ma14113023

Vaidya, U., Theodore, M., & Penumadu, D. (2021). Intermediates, processes and product routes for low cost textile grade carbon fiber. SME Journal of Manufacturing Processes.

Vaidya, U., Kore, S., Penumadu, D., Young, S., Hiremath, N., Sangal Matt, V., & Theodore, M. (2021). Textile grade carbon fiber (TCF) reinforced polycarbonate composites: effect of epoxy sizing. ACS Industrial & Engineering Chemistry Research.

Barnett, P. R., Gilbert, C. L., & Penumadu, D. (2021). Repurposed/recycled discontinuous carbon fiber organosheet development and composite properties. Composites Part C: Open Access, 4. doi:10.1016/j.jcomc.2020.100092

Thakur, M. M., Kim, F., Penumadu, D., & Herring, A. (2021). Pore Space and Fluid Phase Characterization in Round and Angular Partially Saturated Sands Using Radiation-Based Tomography and Persistent Homology. TRANSPORT IN POROUS MEDIA, 137(1), 131-155. doi:10.1007/s11242-021-01554-w

Tran, K. V., Woracek, R., Kardjilov, N., Markötter, H., Hilger, A., Kockelmann, W., . . . Manke, I. (2021). Spectral neutron tomography. Materials Today Advances, 9. doi:10.1016/j.mtadv.2021.100132

Nicholson, D. E., Padula, S. A., Benafan, O., Bunn, J. R., Payzant, E. A., An, K., . . . Vaidyanathan, R. (2021). Mapping of Texture and Phase Fractions in Heterogeneous Stress States during Multiaxial Loading of Biomedical Superelastic NiTi. Advanced Materials, 33(5). doi:10.1002/adma.202005092

Kant, M. E., Crabtree, J. D., Young, S., & Penumadu, D. (2020). Concept of limit stress for the tensile behavior of carbon fiber composite tows. Composites Part B: Engineering, 201. doi:10.1016/j.compositesb.2020.108384

Sharma, A., & Penumadu, D. (2020). Role of particle shape in determining tensile strength and energy release in diametrical compression of natural silica grains. Soils and Foundations, 60(5), 1299-1311. doi:10.1016/j.sandf.2020.08.004

Hiremath, N., Young, S., Ghossein, H., Penumadu, D., Vaidya, U., & Theodore, M. (2020). Low cost textile-grade carbon-fiber epoxy composites for automotive and wind energy applications. COMPOSITES PART B-ENGINEERING, 198, 12 pages. doi:10.1016/j.compositesb.2020.108156

Thakur, M. M., & Penumadu, D. (2020). Triaxial compression in sands using FDEM and micro-X-ray computed tomography. Computers and Geotechnics, 124. doi:10.1016/j.compgeo.2020.103638

Leib, A. R., Sharma, A., & Penumadu, D. (2021). Visualization of Localized Deformations of Sand in Drained Triaxial Compression Using Digital Image Correlation. GEOTECHNICAL TESTING JOURNAL, 44(3), 782-798. doi:10.1520/GTJ20190096

Kardos, M., Körner, E., Penumadu, D., & Modler, N. (2020). The influence of fiber volume fraction and fiber length on the evolution of pore content and the paintability of sheet molding compounds. Composites Part B: Engineering, 185. doi:10.1016/j.compositesb.2020.107760

Young, S., Penumadu, D., Foster, D., Maeser, H., Balijepalli, B., Reese, J., . . . Blanchard, P. (2020). Smart adhesive joint with high-definition fiber- optic sensing for automotive applications. Sensors (Switzerland), 20(3). doi:10.3390/s20030614

Mohsin Thakur, M., Penumadu, D., & Bauer, C. (2020). Capillary Suction Measurements in Granular Materials and Direct Numerical Simulations Using X-Ray Computed Tomography Microstructure. Journal of Geotechnical and Geoenvironmental Engineering, 146(1). doi:10.1061/(ASCE)GT.1943-5606.0002194

Siriruk, A., Woracek, R., Puplampu, S. B., & Penumadu, D. (2019). Damage evolution in VARTM-based carbon fiber vinyl ester marine composites and sea water effects. Journal of Sandwich Structures and Materials, 21(6), 2057-2076. doi:10.1177/1099636217731906

Turner, A. K., Sharma, A., Penumadu, D., & Herbold, E. B. (2019). Finite element analyses of single particle crushing tests incorporating computed tomography imaging and damage mechanics. Computers and Geotechnics, 115. doi:10.1016/j.compgeo.2019.103158

Murray, R. E., Penumadu, D., Cousins, D., Beach, R., Snowberg, D., Berry, D., . . . Stebner, A. (2019). Manufacturing and Flexural Characterization of Infusion-Reacted Thermoplastic Wind Turbine Blade Subcomponents. Applied Composite Materials, 26(3), 945-961. doi:10.1007/s10443-019-9760-2

Ma, R., Truster, T. J., Puplampu, S. B., & Penumadu, D. (2018). Investigating mechanical degradation due to fire exposure of aluminum alloy 5083 using crystal plasticity finite element method. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 134, 151-160. doi:10.1016/j.ijsolstr.2017.10.021

De Cola, F., Pellegrino, A., Gloessner, C., Penumadu, D., & Petrinic, N. (2018). Effect of Particle Morphology, Compaction, and Confinement on the High Strain Rate Behavior of Sand. EXPERIMENTAL MECHANICS, 58(2), 223-242. doi:10.1007/s11340-017-0331-x

Arhant, M., Meek, N., Penumadu, D., Davies, P., & Garg, N. (2018). Residual Strains using Integrated Continuous Fiber Optic Sensing in Thermoplastic Composites and Structural Health Monitoring. EXPERIMENTAL MECHANICS, 58(1), 167-176. doi:10.1007/s11340-017-0339-2

Puplampu, S. B., Penumadu, D., Ma, R., Truster, T. J., Woracek, R., Payzant, E. A., & Bunn, J. R. (2017). Degradation and onset of plastic anisotropy in marine aluminum alloy due to fire exposure by bulk neutron diffraction and in situ loading. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 700, 583-591. doi:10.1016/j.msea.2017.06.050

Darrow, B. G., Biskup, J. J., Weigel, J. P., Jones, M. P., Xie, X., Liaw, P. K., . . . Penumadu, D. (2017). Ex vivo biomechanical evaluation of pigeon (Columba livia) cadaver intact humeri and ostectomized humeri stabilized with caudally applied titanium locking plate or stainless steel nonlocking plate constructs. AMERICAN JOURNAL OF VETERINARY RESEARCH, 78(5), 570-578. doi:10.2460/ajvr.78.5.570

Gloessner, C., Moser, S., Kulls, R., Hess, S., Nau, S., Salk, M., . . . Petrinic, N. (2017). Instrumented Projectile Penetration Testing of Granular Materials. EXPERIMENTAL MECHANICS, 57(2), 261-272. doi:10.1007/s11340-016-0228-0

Meek, N., Penumadu, D., Hosseinaei, O., Harper, D., Young, S., & Rials, T. (2016). Synthesis and characterization of lignin carbon fiber and composites. COMPOSITES SCIENCE AND TECHNOLOGY, 137, 60-68. doi:10.1016/j.compscitech.2016.10.016

Lukosi, E., Herrera, E., Hamm, D., Lee, K. -M., Wiggins, B., Trtik, P., . . . Stowe, A. C. (2016). Lithium indium diselenide: A new scintillator for neutron imaging. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 830, 140-149. doi:10.1016/j.nima.2016.05.063

Farahani, R. V., & Penumadu, D. (2016). Full-scale bridge damage identification using time series analysis of a dense array of geophones excited by drop weight. STRUCTURAL CONTROL & HEALTH MONITORING, 23(7), 982-997. doi:10.1002/stc.1820

Turner, A. K., Kim, F. H., Penumadu, D., & Herbold, E. B. (2016). Meso-scale framework for modeling granular material using computed tomography. COMPUTERS AND GEOTECHNICS, 76, 140-146. doi:10.1016/j.compgeo.2016.02.019

Farahani, R. V., & Penumadu, D. (2016). Damage identification of a full-scale five-girder bridge using time-series analysis of vibration data. ENGINEERING STRUCTURES, 115, 129-139. doi:10.1016/j.engstruct.2016.02.008

De Cola, F., Pellegrino, A., Barbieri, E., Penumadu, D., & Petrinic, N. (2016). Void ratio based representative volume element for modelling the high strain rate behaviour of granular materials. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 91, 46-55. doi:10.1016/j.ijimpeng.2015.12.013

Penumadu, D., Kim, F., & Bunn, J. (2016). Damage of Composite Materials Subjected to Projectile Penetration Using High Resolution X-Ray Micro Computed Tomography. EXPERIMENTAL MECHANICS, 56(4), 607-616. doi:10.1007/s11340-015-0085-2

Kim, F. H., Penumadu, D., Kardjilov, N., & Manke, I. (2016). High-resolution X-ray and neutron computed tomography of partially saturated granular materials subjected to projectile penetration. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 89, 72-82. doi:10.1016/j.ijimpeng.2015.11.008

Kim, F. H., Penumadu, D., Patel, P., Xiao, X., Garboczi, E. J., Moylan, S. P., & Donmez, M. A. (2016). Synchrotron 4-dimensional imaging of two-phase flow through porous media. MRS Advances, 1(40), 2757-2761. doi:10.1557/adv.2016.505

Kim, F. H., Penumadu, D., Gregor, J., Marsh, M., Kardjilov, N., & Manke, I. (2015). Characterizing Partially Saturated Compacted-Sand Specimen Using 3D Image Registration of High-Resolution Neutron and X-Ray Tomography. JOURNAL OF COMPUTING IN CIVIL ENGINEERING, 29(6), 11 pages. doi:10.1061/(ASCE)CP.1943-5487.0000424

Prashant, A., & Penumadu, D. (2015). Uncoupled dual hardening model for clays considering the effect of overconsolidation and intermediate principal stress. Acta Geotechnica, 10(5), 607-622. doi:10.1007/s11440-015-0377-9

Chen, Y., Puplampu, S. B., Summers, P. T., Lattimer, B. Y., Penumadu, D., & Case, S. W. (2015). Quantification of stress-induced damage and post-fire response of 5083 aluminum alloy. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 641, 369-379. doi:10.1016/j.msea.2015.06.060

Rezayat, H., Zhou, W., Siriruk, A., Penumadu, D., & Babu, S. S. (2015). Structure-mechanical property relationship in fused deposition modelling. MATERIALS SCIENCE AND TECHNOLOGY, 31(8), 895-903. doi:10.1179/1743284715Y.0000000010

Van Aarle, W., Ludwig, W., King, A., & Penumadu, D. (2015). An accurate projection model for diffraction image formation and inversion using a polychromatic cone beam. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 48, 334-343. doi:10.1107/S1600576715000928

Prashant, A., & Penumadu, D. (2015). Uncoupled dual hardening model for clays considering the effect of overconsolidation and intermediate principal stress. ACTA GEOTECHNICA, 10(5), 607-622. doi:10.1007/s11440-015-0377-9

Howarth, G. H., Sobolev, N. V., Pernet-Fisher, J. F., Barry, P. H., Penumadu, D., Puplampu, S., . . . Taylor, L. A. (2014). The secondary origin of diamonds: multi-modal radiation tomography of diamondiferous mantle eclogites. INTERNATIONAL GEOLOGY REVIEW, 56(9), 1172-1180. doi:10.1080/00206814.2014.926784

Woracek, R., Penumadu, D., Kardjilov, N., Hilger, A., Boin, M., Banhart, J., & Manke, I. (2014). 3D Mapping of Crystallographic Phase Distribution using Energy-Selective Neutron Tomography. ADVANCED MATERIALS, 26(24), 4069-4073. doi:10.1002/adma.201400192

Woracek, R., Penumadu, D., Kardjilov, N., Hilger, A., Boin, M., Banhart, J., & Manke, I. (2014). Crystallographic Characterization: 3D Mapping of Crystallographic Phase Distribution using Energy-Selective Neutron Tomography (Adv. Mater. 24/2014). Advanced Materials, 26(24), 4068. doi:10.1002/adma.201470162

Siriruk, A., & Penumadu, D. (2014). Degradation in fatigue behavior of carbon fiber-vinyl ester based composites due to sea environment. COMPOSITES PART B-ENGINEERING, 61, 94-98. doi:10.1016/j.compositesb.2014.01.030

Uppal, R., Sen, I., Penumadu, D., Young, S. A., Urffer, M. J., & Miller, L. F. (2014). Li-6 Embedded Biaxially Stretched Scintillation Films for Thermal Neutron Detection and Neutron/Gamma Discrimination. ADVANCED ENGINEERING MATERIALS, 16(2), 196-201. doi:10.1002/adem.201300237

Uppal, R., Sen, I., Penumadu, D., Young, S. A., Urffer, M. J., & Miller, L. F. (2014). ⁶Li embedded Biaxially stretched scintillation films for thermal neutron detection and neutron/gamma discrimination. Advanced Engineering Materials, 16(2), 196-201. doi:10.1002/adem.201300237

Mabe, A. N., Urffer, M. J., Penumadu, D., Schweitzer, G. K., & Miller, L. F. (2014). Transparent lithium-6 based polymer scintillation films containing a polymerizable fluor for neutron detection. RADIATION MEASUREMENTS, 66, 5-11. doi:10.1016/j.radmeas.2014.04.023

Kant, M., & Penumadu, D. (2014). Dynamic mechanical characterization for nonlinear behavior of single carbon fibers. COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 66, 201-208. doi:10.1016/j.compositesa.2014.07.019

Miller, L. F., Urffer, M. J., Mabe, A., Uppal, R., Penumadu, D., & Schweitzer, G. (2014). Secondary Electron Energy Deposition in Thin Polymeric Films for Neutron-Photon Discrimination. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 61(3), 1381-1388. doi:10.1109/TNS.2014.2312822

Bunn, J. R., Penumadu, D., Lou, X., & Hubbard, C. R. (2014). Effect of Multi-Axial Loading on Residual Strain Tensor for 12L14 Steel Alloy. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 45A(9), 3806-3813. doi:10.1007/s11661-014-2355-5

Kant, M., & Penumadu, D. (2013). Fracture behavior of individual carbon fibers in tension using nano-fabricated notches. COMPOSITES SCIENCE AND TECHNOLOGY, 89, 83-88. doi:10.1016/j.compscitech.2013.09.020

Huang, B., Zhang, Y., Shu, X., Liu, Y., Penumadu, D., & Ye, X. P. (2013). Neutron Scattering for Moisture Detection in Foamed Asphalt. JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 25(7), 932-938. doi:10.1061/(ASCE)MT.1943-5533.0000762

Kim, F. H., Penumadu, D., Gregor, J., Kardjilov, N., & Manke, I. (2013). High-Resolution Neutron and X-Ray Imaging of Granular Materials. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 139(5), 715-723. doi:10.1061/(ASCE)GT.1943-5606.0000809

Bunn, J. R., Penumadu, D., Woracek, R., Kardjilov, N., Hilger, A., Manke, I., & Williams, S. (2013). Detection of water with high sensitivity to study polymer electrolyte fuel cell membranes using cold neutrons at high spatial resolution. APPLIED PHYSICS LETTERS, 102(23), 4 pages. doi:10.1063/1.4811246

Mabe, A. N., Auxier, J. D., Urffer, M. J., Penumadu, D., Schweitzer, G. K., & Miller, L. E. (2013). Transparent lithiated polymer films for thermal neutron detection. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 722, 29-33. doi:10.1016/j.nima.2013.04.040

Mabe, A. N., Auxier, J. D., Urffer, M. J., Young, S. A., Penumadu, D., Schweitzer, G. K., & Miller, L. F. (2013). Thin Film Polymer Composite Scintillators for Thermal Neutron Detection. Journal of Composites, 2013, 1-8. doi:10.1155/2013/539060

Kant, M. E., Siriruk, A., Penumadu, D., Garlea, E., Vogel, S. C., Yu, X., & Parish, C. M. (2013). Multi-Axial Mechanical Behavior of Zircaloy-702 and Effect on Initial Texture. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 44A, 94-108. doi:10.1007/s11661-012-1564-z

Kim, F. H., Penumadu, D., Schulz, V. P., & Wiegmann, A. (2013). Pore size distribution and soil water suction curve from micro-tomography measurements and real 3-D digital microstructure of a compacted granular media by using direct numerical simulation technique. Springer Series in Geomechanics and Geoengineering, 3, 171-176. doi:10.1007/978-3-642-32492-5_20

Sen, I., Urffer, M., Penumadu, D., Young, S. A., Miller, L. F., & Mabe, A. N. (2012). Polyester Composite Thermal Neutron Scintillation Films. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 59(4), 1781-1786. doi:10.1109/TNS.2012.2201503

Strobl, M., Woracek, R., Kardjilov, N., Hilger, A., Wimpory, R., Tremsin, A., . . . Penumadu, D. (2012). Time-of-flight neutron imaging for spatially resolved strain investigations based on Bragg edge transmission at a reactor source. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 680, 27-34. doi:10.1016/j.nima.2012.04.026

Woracek, R., Bunn, J. R., Penumadu, D., & Hubbard, C. R. (2012). Method to determine hkl strains and shear moduli under torsion using neutron diffraction. APPLIED PHYSICS LETTERS, 100(19), 5 pages. doi:10.1063/1.4712043

Kardjilov, N., Manke, I., Hilger, A., Williams, S., Strobl, M., Woracek, R., . . . Banhart, J. (2012). Neutron Bragg-edge mapping of weld seams. INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 103(2), 151-154. doi:10.3139/146.110673

Young, S. A., Sen, I., & Penumadu, D. (2012). Investigation of Li-6 Enriched Particle Dispersion in Fluorescent Electrospun Polymer Nanofibers to be Used as Thermal Neutron Scintillators. JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME, 134(1), 7 pages. doi:10.1115/1.4005412

Ragland, W. S., Penumadu, D., & Williams, R. T. (2011). Finite element modeling of a full-scale five-girder bridge for structural health monitoring. STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL, 10(5), 449-465. doi:10.1177/1475921710379515

Sen, I., Penumadu, D., Williamson, M., Miller, L. F., Green, A. D., & Mabe, A. N. (2011). Thermal Neutron Scintillator Detectors Based on Poly (2-Vinylnaphthalene) Composite Films. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 58(3), 1386-1393. doi:10.1109/TNS.2011.2141149

Kim, F. H., Penumadu, D., & Hussey, D. S. (2012). Water Distribution Variation in Partially Saturated Granular Materials Using Neutron Imaging. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 138(2), 147-154. doi:10.1061/(ASCE)GT.1943-5606.0000583

Woracek, R., Penumadu, D., Kardjilov, N., Hilger, A., Strobl, M., Wimpory, R. C., . . . Banhart, J. (2011). Neutron Bragg-edge-imaging for strain mapping under in situ tensile loading. JOURNAL OF APPLIED PHYSICS, 109(9), 4 pages. doi:10.1063/1.3582138

Sen, I., Dadush, E., & Penumadu, D. (2011). Microwave-assisted foaming of expandable polystyrene beads. JOURNAL OF CELLULAR PLASTICS, 47(1), 65-79. doi:10.1177/0021955X10385047

Bunn, J. R., Penumadu, D., & Hubbard, C. R. (2010). Residual strain evolution in steel samples: tension versus torsion. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 99(3), 571-578. doi:10.1007/s00339-010-5616-1

Nordin, C., Ma, Z. J., & Penumadu, D. (2010). Combined Effect of Loading and Cold Temperature on the Stiffness of Glass Fiber Composites. JOURNAL OF COMPOSITES FOR CONSTRUCTION, 14(2), 224-230. doi:10.1061/(ASCE)CC.1943-5614.0000068

Hilger, A., Kardjilov, N., Kandemir, T., Manke, I., Banhart, J., Penumadu, D., . . . Strobl, M. (2010). Revealing microstructural inhomogeneities with dark-field neutron imaging. JOURNAL OF APPLIED PHYSICS, 107(3), 3 pages. doi:10.1063/1.3298440

Ragland, W. S., Penumadu, D., & Williams, R. T. (2010). Using Geophones for Nondestructive Evaluation of Full-Scale Bridges. TRANSPORTATION RESEARCH RECORD, (2201), 45-52. doi:10.3141/2201-06

Nagarkar, V. V., Penumadu, D., Shestakova, I., Thacker, S. C., Miller, S. R., Ankner, J. F., . . . Halbert, C. E. (2009). Time-Resolved High Resolution Neutron Imaging Studies at the ORNL Spallation Neutron Source. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 56(4), 2493-2498. doi:10.1109/TNS.2009.2024745

Penumadu, D., Dutta, A. K., Luo, X., & Thomas, K. G. (2009). Nano and neutron science applications for geomechanics. KSCE JOURNAL OF CIVIL ENGINEERING, 13(4), 233-242. doi:10.1007/s12205-009-0233-2

Woracek, R., Young, S., Penumadu, D., & Frafjord, J. (2009). In-Situ Microstructure Evolution Under Stress Using a Large-Chamber SEM. MICROSCOPY AND MICROANALYSIS, 15, 676-677. doi:10.1017/S143192760909240X

Sachan, A., & Penumadu, D. (2009). Effect of shear deformation on microfabric of clay using XRD technique. Geotechnical and Geological Engineering, 27(2), 249-264. doi:10.1007/s10706-008-9226-z

Sachan, A., & Penumadu, D. (2007). Identification of microfabric of kaolinite clay mineral using x-ray diffraction technique. Geotechnical and Geological Engineering, 25(6), 603-616. doi:10.1007/s10706-007-9133-8

Lee, S. -H., Wang, S., Pharr, G. M., Kant, M., & Penumadu, D. (2007). Mechanical properties and creep behavior of lyocell fibers by nanoindentation and nano-tensile testing. HOLZFORSCHUNG, 61(3), 254-260. doi:10.1515/HF.2007.062

Prashant, A., & Penumadu, D. (2007). Effect of microfabric on mechanical behavior of kaolin clay using cubical true triaxial testing. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 133(4), 433-444. doi:10.1061/(ASCE)1090-0241(2007)133:4(433)

Sachan, A., & Penumadu, D. (2007). Effect of microfabric on shear behavior of kaolin clay. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 133(3), 306-318. doi:10.1061/(ASCE)1090-0241(2007)133:3(306)

Sachan, A., & Penumadu, D. (2007). Strain localization in solid cylindrical clay specimens using Digital Image Analysis (DIA) technique. SOILS AND FOUNDATIONS, 47(1), 67-78. doi:10.3208/sandf.47.67

Chen, X., & Penumadu, D. (2006). Characterizing microstructure of refractory porous materials. JOURNAL OF MATERIALS SCIENCE, 41(11), 3403-3415. doi:10.1007/s10853-005-5342-9

Lin, H., & Penumadu, D. (2006). Strain localization in combined axial-torsional testing on kaolin clay. JOURNAL OF ENGINEERING MECHANICS-ASCE, 132(5), 555-564. doi:10.1061/(ASCE)0733-9399(2006)132:5(555)

Lin, H., Prashant, A., & Penumadu, D. (2006). Single hardening elasto-plastic model for Kaolin Clay with loading-history-dependent plastic potential function. International Journal of Geomechanics, 6(1), 55-63. doi:10.1061/(ASCE)1532-3641(2006)6:1(55)

Lin, H., & Penumadu, D. (2005). Experimental investigation on principal stress rotation in Kaolin clay. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 131(5), 633-642. doi:10.1061/(ASCE)1090-0241(2005)131:5(633)

Prashant, A., & Penumadu, D. (2005). A laboratory study of normally consolidated kaolin clay. CANADIAN GEOTECHNICAL JOURNAL, 42(1), 27-37. doi:10.1139/T04-076

Prashant, A., & Penumadu, D. (2005). Effect of overconsolidation and anisotropy of kaolin clay using true triaxial testing. SOILS AND FOUNDATIONS, 45(3), 71-82. doi:10.3208/sandf.45.3_71

Prashant, A., & Penumadu, D. (2004). Effect of intermediate principal kaolin stress on overconsolidated kaolin clay. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 130(3), 284-292. doi:10.1061/(ASCE)1090-0241(2004)130:3(284)

Mandeville, D., & Penumadu, D. (2004). True triaxial testing system for Proportional-Integral-Differential clay with (PID) control. GEOTECHNICAL TESTING JOURNAL, 27(2), 134-144. Retrieved from https://www.webofscience.com/

Wettimuny, R., & Penumadu, D. (2004). Application of Fourier analysis to digital Imaging for particle shape analysis. JOURNAL OF COMPUTING IN CIVIL ENGINEERING, 18(1), 2-9. doi:10.1061/(ASCE)0887-3801(2004)18:1(2)

Dutta, A. K., Penumadu, D., & Files, B. (2004). Nanoindentation testing for evaluating modulus and hardness of single-walled carbon nanotube-reinforced epoxy composites. JOURNAL OF MATERIALS RESEARCH, 19(1), 158-164. doi:10.1557/jmr.2004.19.1.158

David Suits, L., Sheahan, T. C., Mandeville, D., & Penumadu, D. (2004). True Triaxial Testing System for Clay with Proportional-Integral-Differential (PID) Control. Geotechnical Testing Journal, 27(2), 11756. doi:10.1520/gtj11756

Wettimuny, R., & Penumadu, D. (2003). Automated digital image based measurement of boundary fractal dimension for complex nanoparticles. PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION, 20(1), 18-24. doi:10.1002/ppsc.200390001

Penumadu, D., Dutta, A., Pharr, G. M., & Files, B. (2003). Mechanical properties of blended single-wall carbon nanotube composites. JOURNAL OF MATERIALS RESEARCH, 18(8), 1849-1853. doi:10.1557/JMR.2003.0258

Bartholomeeusen, G., Sills, G. C., Znidarcic, D., Van Kesteren, W., Merckelbach, L. M., Pyke, R., . . . Chan, D. (2002). Sidere: numerical prediction of large-strain consolidation. GEOTECHNIQUE, 52(9), 639-648. Retrieved from https://www.webofscience.com/

Yamamuro, J. A., & Penumadu, D. (2000). Experiments and Modeling of High Strain Rate Effects in Sands and Clays. doi:10.21236/ada381697

Penumadu, D., Zhao, R. D., & Frost, D. (2000). Virtual geotechnical laboratory experiments using a simulator. INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS, 24(5), 439-451. doi:10.1002/(SICI)1096-9853(20000425)24:5<439::AID-NAG74>3.0.CO;2-G

Penumadu, D., & Dean, J. (2000). Compressibility effect in evaluating the pore-size distribution of kaolin clay using mercury intrusion porosimetry. CANADIAN GEOTECHNICAL JOURNAL, 37(2), 393-405. doi:10.1139/cgj-37-2-393

Penumadu, D., & Zhao, R. D. (1999). Triaxial compression behavior of sand and gravel using artificial neural networks (ANN). COMPUTERS AND GEOTECHNICS, 24(3), 207-230. doi:10.1016/S0266-352X(99)00002-6

Yamamuro, J. A., Penumadu, D., & Campbell, A. (1998). Modeling solids conveying in polymer extruders. INTERNATIONAL POLYMER PROCESSING, 13(1), 3-8. doi:10.3139/217.980003

Penumadu, D., Yamamuro, J. A., Abrantes, A. E., & Campbell, G. A. (1998). Stress-strain and volume change characteristics of an assemblage of polymer pellets. INTERNATIONAL POLYMER PROCESSING, 13(4), 347-357. doi:10.3139/217.980347

Penumadu, D., Skandarajah, A., & Chameau, J. L. (1998). Strain-rate effects in pressuremeter testing using a cuboidal shear device: experiments and modeling. CANADIAN GEOTECHNICAL JOURNAL, 35(1), 27-42. doi:10.1139/cgj-35-1-27

Penumadu, D., & Chameau, J. L. (1998). Interpretation of model pressuremeter test using automated clay calibration chamber data. GEOTECHNICAL TESTING JOURNAL, 21(1), 18-30. Retrieved from https://www.webofscience.com/

Penumadu, D., & Chameau, J. L. (1997). Strain rate effects in model pressuremeter testing. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 123(11), 1051-1059. doi:10.1061/(ASCE)1090-0241(1997)123:11(1051)

Penumadu, D. (1996). Closure to “Stress‐Strain Modeling of Sands Using Artificial Neural Networks” by D. Penumadu. Journal of Geotechnical Engineering, 122(11), 950-951. doi:10.1061/(asce)0733-9410(1996)122:11(950)

Penumadu, D. (1996). Seismic liquefaction potential assessed by neural networks - Discussion. JOURNAL OF GEOTECHNICAL ENGINEERING-ASCE, 122(4), 323-325. doi:10.1061/(ASCE)0733-9410(1996)122:4(323)

Penumadu, D. (1996). Evaluating Clay Microfabric Using Scanning Electron Microscopy and Digital Information Processing. Transportation Research Record: Journal of the Transportation Research Board, 1526(1), 112-120. doi:10.1177/0361198196152600114

ELLIS, G. W., YAO, C., ZHAO, R., & PENUMADU, D. (1995). STRESS-STRAIN MODELING OF SANDS USING ARTIFICIAL NEURAL NETWORKS. JOURNAL OF GEOTECHNICAL ENGINEERING-ASCE, 121(5), 429-435. doi:10.1061/(ASCE)0733-9410(1995)121:5(429)

PENUMADU, D., AGRAWAL, G., & CHAMEAU, J. L. (1992). KNOWLEDGE-BASED MODELING OF MATERIAL BEHAVIOR WITH NEURAL NETWORKS - DISCUSSION. JOURNAL OF ENGINEERING MECHANICS-ASCE, 118(5), 1057-1059. doi:10.1061/(ASCE)0733-9399(1992)118:5(1057.2)

Contact Information

312 John D. Tickle Building
Phone: 865-974-7708
E-mail: dpenumad@utk.edu

The University of Tennessee, Knoxville

Department of Civil and Environmental Engineering