孙少周
,
周光明
,
王新峰
材料科学与工程学报
使用商用有限元软件建立了含分层复合材料层板的有限元模型,采用Hashin失效准则对层板内单元进行损伤判断,并编写程序对失效单元进行刚度折减,使用cohesive单元模拟层间区域,并对缺陷区域进行弱化处理,利用应力失效判据和能量释放准则判断层板内起始分层与分层的扩展。对完好以及含分层缺陷复合材料单向层板试验件进行压缩实验研究,实验结果给出了分层位置和尺寸及对材料压缩性能的影响。研究表明,有限元模拟结果与实验结果具有良好的一致性。
关键词:
复合材料
,
分层
,
有限元
,
Cohesive单元
J.L. Song
,
D.J. Hu
,
Z.L. Chang
,
T.Y. Li
,
Z.B. Jiang
金属学报(英文版)
Based on the Finite Element Theory of Rigid Plastic, relevant problems during plastic simulation on sheet metal forming were technologically studied and simplified; a
simplified model of the blank holder during the drawing process was established and
the effects of related parameters on the forming processes were also studied. At the
same time, a finite-element numerical simulation program SPID was developed. The
distribution of strain and relationship of stress-stroke simulated were compared with
experimented, the results are well coincided with each other. It is verified that the
analytical program is reliable.
关键词:
sheet metal forming
,
null
,
null
