Abstract
The elastic/viscoplastic constitutive equation which describes deformation law of metal materials was suggested based on no-yield-surface concept and thermal activation theory of dislocation. The equation which takes account of effects of strain-rate, strain history, strain-rate history, hardening and temperature has stronger physical basis.
Comparison of the theoretical prediction with experimental results of mechanical behaviours of Ti under conditions of uniaxial stress and room temperature shows good consistency.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Yang Xu-can, Yan Gui-tong and Xu Bing-ye,Viscoplastic Mechanics, Chinese Railway Press (1985). (in Chinese)
Bodner, S.R. and Y. Partom, Constitutive equations for elastic-viscoplastic strain-hardening materials,JAM, June (1975), 385–389.
Zhou, G.Q., Some discussion on elastic-viscoplastic theory with no yield surface,Explosion and Shock Waves,3, 4, Oct. (1983). (in Chinese)
Zhou, G.Q., H. Ghoneim and Y. Chen, Numerical experiments with two-dimensional elastic-viscoplastic bars,Int. Journal of Computer and Structure,18, 4 (1984), 591–601.
Fried, J.,Les Dislocations, Gaethier-Villars (1956).
Granato, A.V., K. Lücke, J. Schlipt and L.J. Teutonico, Entropy factors for thermally activated unpinning of dislocations,J. Appl. Phys.,35 (1964), 2732–2745.
Yu Chen, Power-formula viscoplasticity, its modification and some applications,J. Eng. Mater. Tech.,106, 4 (1984), 383–387.
Author information
Authors and Affiliations
Additional information
Communicated by Liu Ren-huai
The Projects Supported by National Natural Science Foundation of China
Rights and permissions
About this article
Cite this article
Guang-quan, Z., Jing-yi, C. A viscoplastic model based on no-yield-surface concept. Appl Math Mech 10, 337–344 (1989). https://doi.org/10.1007/BF02017774
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02017774