2024

A. Mashin, B. Li, D. Malyszek, M. Hamillage, M. Kinzel, K. Kwok (2024). Harnessing instability for deployable propeller blades, Aerospace Science and Technology 146: 108926. https://doi.org/10.1016/j.ast.2024.108926

M. Hamillage, W. Klimm, J.M. Fernandez, K. Kwok (2024). Shape recovery simulation of viscoelastic thin-ply composite coilable booms, Acta Astronautica 215: 607-617.  https://doi.org/10.1016/j.actaastro.2023.12.042

A. Mashin, K. Kwok. Instability-based structural concept for rollable propeller blades, Proceedings of the 2024 SciTech Forum and Exposition, Orlando, FL, January 8-12, 2024. https://doi.org/10.2514/6.2024-0907

V. Khare, K. Kwok, S. Ferraro, I. Baho. High-throughput viscoelastic testing of composite laminates, Proceedings of the 2024 SciTech Forum and Exposition, Orlando, FL, January 8-12, 2024. https://doi.org/10.2514/6.2024-0608

B. Li, K. Kwok. Propagating instability in deployable propeller blade structures, Proceedings of the 2024 SciTech Forum and Exposition, Orlando, FL, January 8-12, 2024. https://doi.org/10.2514/6.2024-0272

2023

W. Klimm, K. Kwok (2023). Computational analysis of tunneling conduction in piezoresistive carbon nanotube polymer composites, Journal of Intelligent Material Systems and Structures, 34 (8): 928-943. https://doi.org/10.1177/1045389X221128575

W. Klimm, K. Kwok (2023). Tunneling resistance model for piezoresistive carbon nanotube polymer composites, Nanotechnology 34: 045502. https://doi.org/10.1088/1361-6528/ac9c0d

V. Khare, S. Kamle, K. Kwok. DIC system with Euler Transformation for structural measurements in wind tunnel, Proceedings of SPIE Smart Structures and Nondestructive Evaluation, Long Beach, CA, April 18, 2023. https://doi.org/10.1117/12.2658755

A. Torisaka, V.B. Ozdemir, K. Kwok. Shape memory behavior and conductivity of CF-CNT-SMP, Proceedings of the 2023 SciTech Forum and Exposition, National Harbor, MD, January 23-27, 2023. https://doi.org/10.2514/6.2023-2401

2022

W. Klimm, K. Kwok (2022). Mechanism of resistance relaxation and hysteresis in viscoelastic piezoresistive polymer nanocomposites, International Journal of Mechanics and Materials in Design 18: 769-783. https://doi.org/10.1007/s10999-022-09603-y

VB. Ozdemir, K. Kwok (2022). Inflated cone experiment for high-throughput characterization of time-dependent polymer membranes, Journal of Applied Mechanics 89 (7): 074501. https://doi.org/10.1115/1.4054523

M. Hamillage, C. Leung, K. Kwok (2022). Viscoelastic modeling and characterization of thin-ply composite laminates, Composite Structures 280: 114901. https://doi.org/10.1016/j.compstruct.2021.114901

VB. Ozdemir, K. Kwok (2022). Electro-thermo-mechanical behavior of carbon nanopaper shape memory polymer composites, Journal of Intelligent Material Systems and Structures 33: 489-500. https://doi.org/10.1177/1045389X211018848

W. Klimm, K. Kwok. Relaxation of electrical resistance in carbon nanotube polymer composites, Proceedings of the 2022 SciTech Forum and Exposition, San Diego, CA, January 3-7, 2022. https://doi.org/10.2514/6.2022-1116

A. Allen, A. Mashin, K. Kwok. Onset of creasing in polymer thin membranes, Proceedings of the 2022 SciTech Forum and Exposition, San Diego, CA, January 3-7, 2022. https://doi.org/10.2514/6.2022-1882

M. Hamillage, W. Klimm, K. Kwok. Permanent shape change of thin-ply composites, Proceedings of the 2022 SciTech Forum and Exposition, San Diego, CA, January 3-7, 2022. https://doi.org/10.2514/6.2022-1117

Rodriguez, T. Murphey, D. Radford, K. Kwok. Predictive engineering tools for modeling the viscoelastic response of high strain composites, Proceedings of the 2022 SciTech Forum and Exposition, San Diego, CA, January 3-7, 2022. https://doi.org/10.2514/6.2022-0650

L. Zhang, W. Klimm, K. Kwok, W. Yu. A nonlinear viscoelastic-viscoplastic constitutive model for epoxy polymers, Proceedings of the 2022 SciTech Forum and Exposition, San Diego, CA, January 3-7, 2022. https://doi.org/10.2514/6.2022-1120

2021

H.L. Frandsen, C. Chatzichristodoulou, B. Charlas, R. Kiebach, K. Kwok, P. Norby, P.V. Hendriksen (2021). Fast relaxation of stresses in solid oxide cells through reduction Part I Macro stresses in the cell layers, International Journal of Hydrogen Energy 46: 1548-1559. https://doi.org/10.1016/j.ijhydene.2020.10.145

W. Klimm, K. Kwok. Effect of matrix viscoelasticity on piezoresistivity of carbon nanotube polymer composites, Proceedings of the 2021 SciTech Forum and Exposition, Virtual, January 11-22, 2021. https://doi.org/10.2514/6.2021-0402

2020

L. Han, B. Talic, K. Kwok, P.V. Hendriksen, H.L. Frandsen (2020). Interface fracture energy of contact layers in a solid oxide cell stack, ACS Applied Energy Materials 3: 2372-2385. https://doi.org/10.1021/acsaem.9b02026

V.B. Ozdemir, K. Kwok. Time-Dependent Yielding of Polymer Thin Films Under Creep. Challenges in Mechanics of Time-Dependent Materials Volume 2: Proceedings of the 2020 Annual Conference on Experimental and Applied Mechanics, Virtual, September 14-17, 2020. https://doi.org/10.1007/978-3-030-59542-5_2

W. Klimm, V.B. Ozdemir, K. Kwok. Multi-objective optimization of deployable viscoelastic tape springs under uncertainty, Proceedings of the 2020 AIAA AVIATION Forum, Virtual, June 15-19, 2020. https://doi.org/10.2514/6.2020-3166

A. Gomez-Delrio, K. Kwok. Stowage and recovery of thin-ply composite deployable structures, Proceedings of the 2020 AIAA SciTech Forum and Exposition, Orlando, FL, January 6-10, 2020. https://doi.org/10.2514/6.2020-0205

W. Klimm, K. Kwok. Surface accuracy of viscoelastic composite thin-shell deployable reflector antennas, Proceedings of the 2020 AIAA SciTech Forum and Exposition, Orlando, FL, January 6-10, 2020. https://doi.org/10.2514/6.2020-0932

2019

A. Carrasco-Pena, R. Jordan, J. Dieguez, A. Coronado-Rodriguez, V.B. Ozdemir, K. Kwok, N. Orlovskaya, F.J. Uribe-Romo, A. Bolon, M. Radovic, S. Grasso, M.J. Reece (2019). Design and development of ring-on-ring jig for biaxial strength testing of brittle ceramic composite materials ZrB₂-30wt%-SiB₆, Advances in Applied Ceramics 118: 159-168. https://doi.org/10.1080/17436753.2019.1613102

T. Molla, K. Kwok, H.L. Frandsen (2019). Modeling the mechanical integrity of generic solid oxide cell stack designs exposed to long-term operation, Fuel Cells 19: 96-109. https://doi.org/10.1002/fuce.201800081

M. Hamillage, K. Kwok, Andrew Gomez-Delrio. High curvature bending of viscoelastic thin-ply composites, Proceedings of the American Society for Composites 34^th Annual Technical Conference, Atlanta, GA, September 23-25, 2019. https://doi.org/10.12783/asc34/31427

V.B. Ozdemir, K. Kwok. Shape recovery behavior of carbon nanopaper shape memory polymer composite, Proceedings of the 2019 AIAA SciTech Forum and Exposition, San Diego, CA, January 7-11, 2019. https://doi.org/10.2514/6.2019-0483

M. Hamillage, K. Kwok, J.M. Fernandez. Micromechanical modeling of high-strain thin-ply composites, Proceedings of the 2019 AIAA SciTech Forum and Exposition, San Diego, CA, January 7-11, 2019. https://doi.org/10.2514/6.2019-1751

2018

A. Haugen, L. Aguilera, K. Kwok, T.T. Molla, K. Andersen, S. Pirou, A. Kaiser, P.V. Hendriksen, R. Kiebach (2018). Exploring the processing of tubular chromite-and zirconia-based oxygen transport membranes, Ceramics 1: 229-245. https://doi.org/10.3390/ceramics1020019

T.T. Molla, F. Greco, K. Kwok, P. Zielke, H.L. Frandsen (2018). Development of high temperature mechanical rig for characterizing the viscoplastic properties of alloys used in solid oxide fuel cells, Journal of Testing and Evaluation 46: 5. https://doi.org/10.1520/JTE20170046

A. Gomez-Delrio, K. Kwok. Viscoelastic behavior of thin-ply composites for deployable structures, Proceedings of the 69^th International Astronautical Congress, Bremen, Germany, October 1-5, 2018.

K. Kwok, Viscoelastic analysis of stowage and quasi-static deployment of composite tape springs, Proceedings of the 2018 AIAA SciTech Forum and Exposition, Kissimmee, FL, January 8-12, 2018. https://doi.org/10.2514/6.2018-0940

2017

R. Kiebach, P. Zielke, S. Veltze, Y. Xu, S. Ovtar, S.B. Simonsen, K. Kwok, H.L. Frandsen, R. Kungas (2017). On the properties and long-term stability of infiltrated solid oxide fuel cell cathodes, Journal of the Electrochemical Society 164: F748-F758. https://doi.org/10.1149/2.0361707jes

T.T. Molla, K. Kwok, H.L. Frandsen (2017). Transient deformational properties of high temperature alloys used in solid oxide fuel cell stacks, Journal of Power Sources 351: 8-16. https://doi.org/10.1016/j.jpowsour.2017.03.059

K. Kwok, S. Pellegrino (2017). Micromechanics models for viscoelastic plain-weave composite tape springs, AIAA Journal 55: 309-321. https://doi.org/10.2514/1.J055041

M. Hauth, V. Lawlor, P. Cartellieri, C. Zechmeister, S. Wolff, C. Bucher, J. Malzbender, J. Wei, A. Weber, G. Tsotridis, H.L. Frandsen, K. Kwok, T.T. Molla, Z. Wuillemin, J. Van Herle, F. Greco, T. Cornu, A. Nakajo, A. Atkinson, L. Vandeperre, X. Wang, Production and reliability oriented SOFC cell and stack design, ECS Transactions 78: 2231-2249, 2017. https://doi.org/10.1149/MA2017-03/1/340

2016

T.T. Molla, K. Kwok, H.L. Frandsen (2016). Efficient modeling of metallic interconnects for thermo-mechanical simulation of SOFC stacks: homogenized behaviors and effect of contact, International Journal of Hydrogen Energy 41: 6433-6444. https://doi.org/10.1016/j.ijhydene.2016.03.002

D. Ni, B. Charlas, K. Kwok, T.T. Molla, H.L. Frandsen (2016). Influence of temperature and atmosphere on the strength and elastic modulus of solid oxide fuel cell anode supports, Journal of Power Sources 311: 1-12. https://doi.org/10.1016/j.jpowsour.2016.02.027

B. Li, K. Kwok, S. Pellegrino (2016). Thermoviscoelastic models for polyethylene thin films, Mechanics of Time-Dependent Materials 20: 13-43. https://doi.org/10.1007/s11043-015-9282-8

R. Kiebach, K. Engelbrecht, K. Kwok, S. Molin, M. Søgaard, P. Niehoff, F. Schulze-Kuppers, R. Kriegel, J. Kluge, P.V. Hendriksen (2016). Joining of ceramic Ba_0.5Sr_0.5Co_0.8Fe_0.2O₃ membranes for oxygen production to high temperature alloys, Journal of Membrane Science 506: 11-21. https://doi.org/10.1016/j.memsci.2016.01.050

K. Kwok, D. Boccaccini, A.H. Persson, H.L. Frandsen (2016). Homogenization of steady-state creep of porous metals using three-dimensional microstructural reconstructions, International Journal of Solids and Structures 78-79: 38-46. https://doi.org/10.1016/j.ijsolstr.2015.09.020

H.L. Frandsen, C. Chatzichristodoulou, P.S. Jørgensen, K. Kwok, P.V. Hendriksen. Relaxation of stresses during reduction of anode supported SOFCs, Proceedings of the 12th European SOFC& SOE Forum, Lucerne, Switzerland, July 5-8, 2016.

2015

K. Kwok, P.S. Jørgensen, H.L. Frandsen (2015). Computation of effective steady-state creep of porous Ni-YSZ composites with reconstructed microstructures, Journal of the American Ceramic Society 98: 2873-2880. https://doi.org/10.1111/jace.13712

D.K. Ramachandran, K. Kwok, M. Søgaard, F. Clemens, A.J. Glasscock, A. Kaiser (2015). The role of sacrificial fugitives in thermoplastic extrusion feedstocks on properties of MgO supports for oxygen transport membranes, Journal of the European Ceramic Society 35: 1527-1537. https://doi.org/10.1016/j.jeurceramsoc.2014.11.014

K. Kwok (2015). Shape recovery of viscoelastic beams after stowage, Mechanics Based Design of Structures and Machines 43: 95-111. https://doi.org/10.1080/15397734.2014.930668

J. Li, K. Kwok, S. Pellegrino, Large-strain viscoelastic constitutive models for thin polyethylene films, Proceedings of the 2015 AIAA SciTech Forum and Exposition, Kissimmee, FL, January 5-9, 2015. https://doi.org/10.2514/6.2015-0194

2014

D. Boccaccini, H.L. Frandsen, B.R. Sudireddy, P. Blennow, A.H. Persson, K. Kwok, P.V. Hendriksen (2014). Creep behaviour of porous metal supports for solid oxide fuel cells, International Journal of Hydrogen Energy 39: 21569-21580. https://doi.org/10.1016/j.ijhydene.2014.07.138

K. Kwok, H.L. Frandsen, M. Søgaard, P.V. Hendriksen (2014). Mechanical reliability of geometrically imperfect tubular oxygen transport membranes, Journal of Membrane Science 470: 80-89. https://doi.org/10.1016/j.memsci.2014.07.029

K. Kwok, L. Kiesel, H.L. Frandsen, M. Søgaard, P.V. Hendriksen (2014). Strength characterization of tubular ceramic materials by flexure of semi-cylindrical specimens, Journal of the European Ceramic Society 34: 1423-1432. https://doi.org/10.1016/j.jeurceramsoc.2013.12.005

K. Kwok, H.L. Frandsen, M. Søgaard, P.V. Hendriksen (2014). Stress analysis and fail-safe design of bilayered tubular supported ceramic membranes, Journal of Membrane Science 453: 253-262. https://doi.org/10.1016/j.memsci.2013.11.020

K. Kwok, P.S. Jørgensen, H.L. Frandsen, Micromechanical modeling of solid oxide fuel cell anode supports based on three-dimensional reconstructions, Proceedings of the 11th European SOFC& SOE Forum, Lucerne, Switzerland, July 1-4, 2014.

B. Charlas, C. Chatzichristodoulou, K. Brodersen, K. Kwok, P. Norby, M. Chen, H.L. Frandsen, Residual stresses in a co-sintered SOC half-cell during post-sintering cooling, Proceedings of the 11th European SOFC& SOE Forum, Lucerne, Switzerland, July 1-4, 2014.

2013 – 2009

K. Kwok, S. Pellegrino (2013), Folding stowage and deployment of viscoelastic tape-springs, AIAA Journal 51: 1908-1918. https://doi.org/10.2514/1.J052269

K. Kwok, S. Pellegrino, Micromechanical modeling of deployment and shape recovery of thin-walled viscoelastic composite space structures, Proceedings of the 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, HI, April 23-26, 2012. https://doi.org/10.2514/6.2012-1910

K. Kwok, S. Pellegrino, Large strain viscoelastic model for balloon film, Proceedings of the 11th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference, including the AIAA Balloon Systems Conference and 19th AIAA Lighter-Than-Air Technology Conference, Virginia Beach, VA, September 20-22, 2011. https://doi.org/10.2514/6.2011-6939

K. Kwok, S. Pellegrino, Viscoelastic effects in tape-springs, Proceedings of the 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Denver, CO, April 4-7, 2011. https://doi.org/10.2514/6.2011-2022

K. Kwok, S. Pellegrino, Shape recovery of viscoelastic deployable structures, Proceedings of the 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Orlando, FL, April 12-15, 2010. https://doi.org/10.2514/6.2010-2606

M.B. Quadrelli, K. Kwok, S. Pellegrino, Structural and trajectory control of variable geometry planetary entry systems, Proceedings of the AIAA SPACE 2009 Conference and Exposition, Pasadena, CA, September 14-17, 2009.

M.B. Quadrelli, D. Boussalis, G. Davis, K. Kwok, S. Pellegrino, Structural and control concepts for variable geometry planetary entry systems, Proceedings of the 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Palm Springs, CA, May 4-7, 2009. https://doi.org/10.2514/6.2009-2100