| 摘要: |
| 在假设弹性系数为常数的前提下，采用有限变形弹塑性有限元法，研究了单向压缩时如何用简单的幂次本构关系来逼近载荷－位移实验曲线，将这一本构关系推以多维弹塑性大变 ，用于解决金属成型问题时，受变形大小的限制嘱 用具有能量共轭关系的旋转克希霍夫应力和对数应变进行计算，则不受变形大小的限制，可得到满意的计算结果。 |
| 关键词: 有限变形 弹塑性有限元法 金属成形 应力应变 |
| DOI： |
| 修订日期：1999-12-21 |
| 基金项目:国家自然科学基金资助项目 |
|
| The Choice of Stress and Strain Occuring in Metal Finite Deformation |
|
|
|
| Abstract: |
| Assuming that the elastic coefficient is a constant, using the elastoplastic finite element algorithms, and simple power hardening constitutive relation, the load displacement curve is obtained for one dimensional. The constitutive relation for two dimensional elastoplastic finite deformation can be extended and can be used to solve the protem when the metal forging processes with the restriction of the degree of deformation. The rotated Kirchholff's stress and logarithmic strain can be used to overcome this defect, and the good results can be obtained. |
| Key words: finite deformation,elastoplastic finite element algorithms,metal forming |
