Principal investigator

Li-Wei Liu, Ph.D.

Dr. Li-Wei Liu is an Assistant Professor with National Taiwan University. He has expertise in

Theoretical, computational, and experimental plasticity;
Theoretical and computational study of constrained systems;
Applications of hypercomplex (Clifford) analysis in anisotropic-coupled mechanics.

Now he focuses on

Experimental, theoretical, and computational study in multiscale plasticity;
Coupled mechanics of anisotropic and isotropic materials;
Mechanics of soft biological tissue;
Mechanics of bio-inspired structural materials.

Published Work

Selected journal publication

Li-Wei Liu⋆, Zih-Ce Ciou, and Po-Ho Chen, A return-free integration for anisotropic-hardening elastoplastic models , Computers and Structures , Vol. 301,107423,2024
Li-Wei Liu⋆, Chang-Yun Yang, and Hong-Gen Chen, Finite element analysis on yield surface evolution of cellular materials, International Journal of Mechanical Sciences, Vol. 246, 108123, 2023.
Hong-Ki Hong, Li-Wei Liu, Ya-Po Shiao, and Cheng-Jih Chang, Building struc- ture with elastoplastic bilinear model under multi-dimensional earthquake forces, Journal of Mechanics,Vol. 38, pp. 598-609, 2022.
Kuang-Yen Liu, Li-Wei Liu*, Deng-Gang Huang, Tsai-Ling Tsai, Viscoelastoplastic and incremental analysis of bridge with functional bearing ,Journal of Sound and Vibration,Vol. 530, 116926, 2022.
Hong-Ki Hong, Li-Wei Liu, Ya-Po Shiao, Shao-Fu Yan, Yield Surface Evolution and Elastoplastic Model with Cubic Distortional Yield Surface, Journal of Engineering Mechanics, Vol. 148, Issue 6, 04022027, June, 2022.
Li-Wei Liu*, Chung-Hao Lee, Ankush Aggarwal, Chih-Ming Chao, Colton J. Ross, Yu-kai Liao, Viscoelastic modelling of the tricuspid valve chordae tendineae tissue, Applied Mathematical Modelling, Vol. 105, pp. 648-669, 2022.
K.-Y. Liu, Li-Wei Liu, D.-G. Huang, Y.-H. Lu, Seismic performance of bridge with functional bearing system subjected to near-fault earthquake, Journal of the Chinese Institute of Civil and Hydraulic Engineering, Vol. 31, No. 5, pp. 443-454, 2019.
Li-Wei Liu*, K.-Y. Liu and D.-G. Huang, Incremental analysis for seismic assessment of bridge with functional bearing system subjected to near-fault earthquake, International Journal of Structural Stability and Dynamics, Vol. 19, No. 1, 1940003, 2019.
H.-K. Hong, Y.-C. Kao, J.-W. Lee, Li-Wei Liu, and J.-T. Chen, Quaternion boundary element method for coupled exterior and interior magnetostatic fields, IEEE Transactions on Magnetics, Vol. 54, No. 6, 7205410, 2018.
Li-Wei Liu* and H.-K. Hong, Clifford algebra valued boundary integral equations for three-dimensional elasticity, Applied Mathematical Modelling, Vol. 54, pp. 246-267, 2018.
Li-Wei Liu* and H.-K. Hong, A description of three-dimensional yield surfaces by cubic polynomials, Journal of Engineering Mechanics Vol. 143, No. 11, 04017129, 2017.
C.-S. Liu, W. Chen, and Li-Wei Liu* Solving mechanical systems with nonholonomic constraints by the Lie-group differential algebraic equations method, Journal of Engineering Mechanics, Vol. 143, No. 9, 04017097, 2017.
J.-W. Lee, Li-Wei Liu, H.-K. Hong, and J.-T. Chen, Applications of the Clifford algebra valued boundary element method to electromagnetic scattering problems, Engineering Analysis with Boundary Elements, Vol. 71, pp. 140-150, 2016.
C.-S. Liu, Li-Wei Liu*, and H.-K. Hong, A scheme of automatic stress-updating on yield surfaces for a class of elastoplastic models, International Journal of Non-Linear Mechanics, Vol. 85, pp. 6-22, 2016.

Selected international conference publication

Li-Wei Liu⋆ and Hong-Gen Chen, Finite element analysis on subsequent yield surfaces of cellular composites, The XVII International Conference on Computa- tional Plasticity, Barcelona, Spain, 5-7, September, 2023.
Li-Wei Liu⋆ and Hong-Gen Chen, Influence of microstructures on viscoelastic features of cellular materials, International Conference on Multi scale Science and Engineering, Okinawa, Japan, 18-20 July 2023.
Li-Wei Liu⋆ and Yuan-Jyun Shih, Viscoelastic characteristics of nacre-like materi- als, Engineering Mechanics Institute Conference, Georgia Institute of Technology, Atlanta, USA, June 6 to 9, 2023.
Li-Wei Liu⋆ and Zih-Ce Ciou, Applications of return-free integration to study on contraction ratios of stainless steel, International Conference on Machining, Materials and Mechanical Technologies, Taipei, Taiwan November 11 to 14, 2022.
Li-Wei Liu⋆ and Zih-Ce Ciou, An elastoplastic model of cortical bone and its return-free integration, The 15th World Congress on Computational Mechanics (WCCM XII) and the 8th Asia-Pacific Congress on Computational Mechanics (APCOM VI), Yokohama, Japan, 31 July5 August 2022.
Li-Wei Liu⋆ and Chang-Yun Yang, Yield surface evolution of trabecular bone, The 15th World Congress on Computational Mechanics (WCCM XII) and the 8th Asia-Pacific Congress on Computational Mechanics (APCOM VI), Yokohama, Japan, 31 July5 August 2022.
Li-Wei Liu⋆, Chih-Ming Chao and, Yuan-Jyun Shih, A viscoelastic modelling of bone with microstructures, The 15th World Congress on Computational Mechan- ics (WCCM XII) and the 8th Asia-Pacific Congress on Computational Mechanics (APCOM VI), Yokohama, Japan, 31 July5 August 2022.
Li-Wei Liu⋆, K.-Y. Liu, and T.-L. Tsai, Incremental dynamic analysis on a bridge with varying-friction functional bearing, The 17th East Asia-Pacific Conference on Structural Engineering & Construction (EASEC17), Singapore, June 27-30, 2022.
Li-Wei Liu*, Chung-Hao Lee, Chih-Ming Chao, Experimental and theoretical study on the Viscoelastic behavior of the tricuspid valve chordae tendineae tissue, 9th World Congress of Biomechanics, Taipei July 10-14, 2022.
Li-Wei Liu, Application of plastic analysis to hierarchical architecture of honeycomblike materials, Asia Paciﬁc Congress on Computational Mechanics, Taipei, 18 to 21 December, 2019.
Li-Wei Liu, K.-Y. Liu, Viscoelastoplastic analysis of a bridge with functional bearing system, The Sixteenth East Asia-Paciﬁc Conference on Structural Engineering & Construction, Brisbane, Australia, 3 to 6 December, 2019.
Li-Wei Liu, Numerical integrations for elastoplastic and viscoelastoplastic materials, The 10th Asian-Paciﬁc Conference on Aerospace Technology and Science & The 4th Asian Joint Symposium on Aerospace Engineering, National Chiao Tung University, Hsin Chu, Taiwan, 28 to 31 August, 2019.
Li-Wei Liu, A return-free integration for viscoelastoplastic models, Engineering Mechanics Institute Conference, Caltech, Pasadena, USA, 18 June to 21 June, 2019.
Li-Wei Liu*, S.-W. Chang, S. Parma, On the yield surface of carbon nanotubes by molecular dynamics simulation, The second International Conference on Mechanics , Yilan, Taiwan, October 14 to 18, 2018.
Li-Wei Liu, Yield surface evolution and return-free integrations, Taipei-Japan Workshop on Mechanical and Aerospace Engineering, Hsinchu, Taiwan, October 5 to 7, 2018.
Li-Wei Liu*, S.-W. Chang, S. Parma, On the cyclic and biaxial behaviour of carbon nanotubes by molecular dynamics simulation, Engineering Mechanics Institute Conference, MIT, Boston, USA, 29 May to 1 June, 2018.
Li-Wei Liu, Application of Lie group theory in solving problems of elastoplastic materials, Annual Meeting of International Association of Applied Mathematics and Mechanics, Munich, Germany, 19 to 23 March, 2018.
Li-Wei Liu* and K.-Y. Liu, Incremental Analysis of Bridge Bearing Systems, The Fifteenth East Asia-Pacific Conference on Structural Engineering and Construction (EASEC) Conference, Xi'an, China, 11 to 13 October, 2017.
Li-Wei Liu* and H.-K. Hong, Development of a distortional hardening model in the axial-torsional-hoop stress space, The XIV International Conference on Computational Plasticity, Barcelona, Spain, 5 to 7 September, 2017.
Li-Wei Liu* and K.-Y. Liu, An algorithm for elastoplastic models of materials and bridge bearing systems with friction elements, Engineering Mechanics Institute Conference, San Diego, USA, 4 to 7 June, 2017.
Li-Wei Liu* and H.-K. Hong, A general solution for three dimensional problems of anisotropic elasticity, The 24th International Congress of Theoretical and Applied Mechanics (ICTAM 2016), Montreal, Canada, 21 to 26 August, 2016.
J.-W. Lee, Li-Wei Liu, H.-K. Hong, and J.-T. Chen, Applications of Clifford algebra valued boundary integral equations to electromagnetic scattering problems, The 12th World Congress on Computational Mechanics (WCCM XII) and the 6th Asia-Pacific Congress on Computational Mechanics (APCOM VI), Seoul, Korea, 24 to 29 July 2016.
Li-Wei Liu*, Y.-C. Kao, and H.-K. Hong, Quaternion valued dual boundary integral equations for three-dimensional magnetostatics with degenerate boundary, The 12th World Congress on Computational Mechanics (WCCM XII) and the 6th Asia-Pacific Congress on Computational Mechanics (APCOM VI), Seoul, Korea, 24 to 29 July 2016.
Li-Wei Liu*, H.-K. Hong, and C.-H. Yu, Return-free integrations for the elastoplastic models with distortional hardening, The 12th World Congress on Computational Mechanics (WCCM XII) and the 6th Asia-Pacific Congress on Computational Mechanics (APCOM VI), Seoul, Korea, 24 to 29 July 2016.

Selected domestic conference publication

Li-Wei Liu* and Jing-Yan Wang, Inelastic micromechanics of nacre, The 47th National Conference on Theoretical and Applied Mechanics, Yunlin, Taiwan, 17- 18 November, 2023.
Li-Wei Liu* and Po-Ho Chen, Investigation on contraction ratio of materials by return-free integrations, The 47th National Conference on Theoretical and Applied Mechanics, Yunlin, Taiwan, 17-18 November, 2023.
Li-WeiLiu*andCheng-YuanChen,SeismicAnalysison2DResponsesofBuilding Structures, The 47th National Conference on Theoretical and Applied Mechanics, Yunlin, Taiwan, 17-18 November, 2023.
Li-Wei Liu* and Zhen-En Jian, Analysis of wave and vibration behavior in cellular materials, The 47th National Conference on Theoretical and Applied Mechanics, Yunlin, Taiwan, 17-18 November, 2023.
Li-Wei Liu* and Yuan-Jyun Shih and Jing-Yan Wang, Mechanical property of cellular materials under cyclic loading, Association of Computational Mechanics Taiwan (ACMT) 2023 Annual Meeting and The 14th Workshop on Boundary Element Methods, Keelung City, Taiwan, 28-29 October, 2023.
Li-WeiLiu*,Hong-YiWuandPo-HoChen,FiniteelementanalysisonBauschinger effect of trabecular bone, Association of Computational Mechanics Taiwan (ACMT) 2023 Annual Meeting and The 14th Workshop on Boundary Element Methods, Keelung City, Taiwan, 28-29 October, 2023.
Li-Wei Liu*, Tsai-Ling Tsai, Kuang-Yen Liu, Cheng-Yuan Chen, Near-Fault Seis- mic Responses of a Bridge with Varying-Friction Functional Bearing, Association of Computational Mechanics Taiwan (ACMT) 2023 Annual Meeting and The 14th Workshop on Boundary Element Methods, Keelung City, Taiwan, 28-29 October, 2023.
Li-Wei Liu*, Hong-Gen Chen and Zhen-En Jian, Mechanical property of cellular materials under cyclic loading, Association of Computational Mechanics Taiwan (ACMT) 2023 Annual Meeting and The 14th Workshop on Boundary Element Methods, Keelung City, Taiwan, 28-29 October, 2023.
Li-Wei Liu* and Yuan-Jyun Shih and Jing-Yan Wang, Micro-mechanics of vis- coelasticity in bones, Annual meeting of Taiwanese Society of Biomechanics, Hsinchu city, Taiwan, 13 October, 2023,
Hong-Yi Wu and Li-Wei Liu*, Finite element analysis on yield surfaces of tra- becular bone, Taiwan Society for Industry and Applied Mathematics Annual Meeting, May 20-21, 2023.
Kuan-Ting Lee and Li-Wei Liu*, On elastic features of tubular materials, Taiwan Society for Industry and Applied Mathematics Annual Meeting, May 20-21, 2023.
Li-Wei Liu* and Kuan-Ting Lee, On elastic features of tubular-architectured ma- terials via a boundary integral equation method, The 39th National Conference on Mechanical Engineering of CSME, National United University, Miaoli, Taiwan, 2-3 December, 2022.
Li-Wei Liu* and Yuan-Jyun Shih, Mechanical behavior of nacre-like materials un- der monotonic and cyclic loadings, The 39th National Conference on Mechanical Engineering of CSME, National United University, Miaoli, Taiwan, 2-3 Decem- ber, 2022.
Li-Wei Liu* and Hong-Gen Chen, Finite element analysis on yield surface evo- lution of cellular composites, The 39th National Conference on Mechanical En- gineering of CSME, National United University, Miaoli, Taiwan, 2-3 December, 2022.
Li-Wei Liu* and Hong-Gen Chen, Viscoelastic behavior of honeycomb materi- als, The 46th National Conference on Theoretical and Applied Mechanics (46th CTAM 2022), Nov. 18-19, 2022.
Li-Wei Liu* and Yuan-Jyun Shih, Damping behavior of nacre and nacre-like materials, The 46th National Conference on Theoretical and Applied Mechanics (46th CTAM 2022), Nov. 18-19, 2022.
Li-Wei Liu*, Chih-Ming Chao, and Yuan-Jyun Shih, A modified dynamical me- chanical analysis for chordae tendineae, Annual meeting of Taiwanese Society of Biomechanics, I-Shou University, Taiwan October 28, 2022.
Yuan-Jyun Shih and Li-Wei Liu*, A viscoelastic modeling of nacre with mi- crostructures, Taiwan Society for Industry and Applied Mathematics Annual Meeting, July 23-24, 2022.
Chang-Yun Yang and Li-Wei Liu*, Yield surface evolution of cellular materials, The 38th National Conference on Mechanical Engineering of CSME, National Cheng Kung University, Tainan, Taiwan, 3-4 December, 2021.
Zie-Ch Chiu and Li-Wei Liu*, Error analysis of return-free integration for anisotropic materials, The 38th National Conference on Mechanical Engineering of CSME, National Cheng Kung University, Tainan, Taiwan, 3-4 December, 2021.
Chang-Yun Yang and Li-Wei Liu*, Finite element analysis on yield surfaces of honeycombs, The 45th National Conference on Theoretical and Applied Mechanics (45th CTAM 2021), Nov. 18-19, 2021.
Tsai-Ling Tsai, Li-Wei Liu*, and Kuang-Yen Liu, Modelling of a bridge with functional bearing system containing varying friction, The 45th National Conference on Theoretical and Applied Mechanics (45th CTAM 2021), Nov. 18-19, 2021
Li-Wei Liu* and Kuang-Yen Liu, Evaluation of bridge with functional bearing under far-eld and near-fault earthquakes via viscoelastoplastic analysis, The 45th National Conference on Theoretical and Applied Mechanics (45th CTAM 2021), Nov. 18-19, 2021.
Chih-Ming Chao and Li-Wei Liu*, State space formulations of viscoelastic model for tricuspid valve chordae tendineae, The 45th National Conference on Theoretical and Applied Mechanics (45th CTAM 2021), Nov. 18-19, 2021.
Li-Wei Liu* and Zie-Ch Chiu, Consistency error of return-free integration for anisotropic materials, The 45th National Conference on Theoretical and Applied Mechanics (45th CTAM 2021), Nov. 18-19, 2021.
Chih-Ming Chao and Li-Wei Liu*, Applications of state space formulations to mechanical study of tricuspid valve chord tendineae, Taiwan Society for Industry and Applied Mathematics Annual Meeting, August 7, 2021.
Li-Wei Liu, Yi-Cheng Hsieh, Applications of return-free integrations to distortional hardening models of elastoplasticity, The 44th National Conference on Theoretical and Applied Mechanics (44th CTAM 2020), Yilan, Taiwan, Nov.26-27, 2020.
Li-Wei Liu, Che-Hao Lee, Chen-Min Lian, Shu-Wei Chang, First step on plastic behavior of honeycombs under cyclic loading, The 44th National Conference on Theoretical and Applied Mechanics (44th CTAM 2020), Yilan, Taiwan, Nov.26-27, 2020.
You-Sian Hong and Li-Wei Liu*, Inﬂuence of stiﬀ-soft mixture on honeycomb structural materials, The 36th National Conference on Mechanical Engineering of CSME, National Taiwan Normal University, Taiwan, Taiwan, 7-8 December 2019.
Li-Wei Liu* and Ren´e Marek, A return-free integration for directional distortional hardening models of elastoplasticity, The 43th National Conference on Theoretical and Applied Mechanics (43th NCTAM 2018), Taichung, Taiwan, 2930, November 2019.
K.-Y. Liu, Li-Wei Liu, and D.-G. Huang, Performance of Typical PCI Bridge with Elastomeric Bearing subjected to Near Fault Earthquake, The 4th Workshop with NCREE and Kyushu University, Taipei, 18 May 2018.
Y.-C. Kao, H.-K. Hong, J.-W. Lee, Li-Wei Liu and J.-T. Chen, Boundary element method for quaternion valued Laplace equation in coupled exterior and interior magnetostatic fields, The 40th National Conference on Theoretical and Applied Mechanics, Hsinchu, Taiwan, 25 to 26 November, 2016. (Excellent Work, Best Student Paper)
Li-Wei Liu, An evaluation for several distortional hardening rules of elastoplasticity, The second Association Computational Mechanics Taiwan (ACMT) Conference, Taipei, 20 to 21 October, 2016. (Keynote Lecture)