Crystallographic Unified Viscoplastic Constitutive Relations of Single-crystal Material

DOI

10.2991/icadme-15.2015.112How to use a DOI?

Keywords

Slip system;crystallographic constitutive;creep-plasticity interaction;DD3

Abstract

Unified viscoplastic constitutive equations are established in the crystal slip systems on the basis of the theory of crystal slip. Plastic dashpots reflecting the material transient response and Newton dashpots mirroring the material viscosity are introduced in slip systems to establish the viscoplastic flow equations and hardening equations for description viscoplastic properties of material slip systems. The physical mechanism of work hardening is divided into two basic types: plug hardening and tangles hardening. Creep additional hardening is introduced in the hardening functions of single crystal to reflect non equal hardening effect of creep and plasticity. The concept of yield surface is removed from the viscoplastic constitutive equations of the single crystal, resulting not needing to judge the yield condition in the calculation process, not needing to search the moving slip systems and simplified calculation process. The constitutive equations can be used for cyclic plasticity simulations, to describe the creep cyclic interaction.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Qing Wu Wang
PY  - 2015/10
DA  - 2015/10
TI  - Crystallographic Unified Viscoplastic Constitutive Relations of Single-crystal Material
BT  - Proceedings of the 5th International Conference on Advanced Design and Manufacturing Engineering
PB  - Atlantis Press
SP  - 554
EP  - 557
SN  - 2352-5401
UR  - https://doi.org/10.2991/icadme-15.2015.112
DO  - 10.2991/icadme-15.2015.112
ID  - Wang2015/10
ER  -