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31.
ＡＣＯＮＤＥＮＳＥＤＭＥＴＨＯＤＦＯＲＬＩＮＥＡＲＣＯＭＰＬＥＭＥＮＴＡＲＹＥＱＵＡＴＩＯＮＳＯＦＥＬＡＳＴＯ－ＰＬＡＳＴＩＣＰＲＯＢＬＥＭＳＹｉｎＦｕｘｉｎ（殷福新），ＳｕｎＨｕａｎｃｈｕｎ（孙焕纯）（ＲｅｃｅｉｎｅｄＪｕｌｙ２５．１９９４）ＡＣＯ... 相似文献
32.
本文利用一单参数三维塑性模型对AS4/PEEK热塑性复合材料的塑性行为进行表征。利用有限元程序生成系统FEPG,将复合材料的三维单参数塑性模型引入该系统中,编制了相应的有限元程序。通过将本文的有限元计算结果与文献实验结果进行对比,证明了所生成程序的精确性。并对AS4/PEEK热塑性复合材料层合板[0/90]s的面内应力进行了计算与分析。给出了0°层与90°层的面内应力。0°层的最大应力σx大约是90°层相应值的20倍,这主要是由于热塑性复合材料AS4/PEEK的纵向和横向模量存在很大的不同,并且具有明显的弹塑性行为所造成的。 相似文献
33.
Several effective numerical methods for solving the elasto-plastic contact problems with friction are presented. First, a
direct substitution method is employed to impose the contact constraint conditions on condensed finite element equations,
thus resulting in a reduction by half in the dimension of final governing equations. Second, an algorithm composed of contact
condition probes and elasto-plastic iterations is utilized to solve the governing equation, which distinguishes two kinds
of nonlinearities, and makes the solution unique. In addition, Positive-Negative Sequence Modification Method is used to condense
the finite element equations of each substructure and an analytical integration is introduced to determine the elasto-plastic
status after each time step or each iteration, hence the computational efficiency is enhanced to a great extent. Finally,
several test and practical examples are presented showing the validity and versatility of these methods and algorithms.
The Project Supported by National Natural Science Foundation of China. 相似文献