基于三维四向编织复合材料预制件的细观结构,提出了螺旋型纤维等效模型.采用多相有限元数值法获得了三维四向编织复合材料的轴向拉伸应力应变关系,通过有限元计算得到了材料单胞模型的细观应力分布.结果表明,螺旋型纤维等效模型的数值预报结果与实验数据基本吻合,证明了该单胞模型符合三维四向编织复合材料的实际细观结构,该模型能有效地计算三维编织复合材料单胞细观应力分布场,为后续的强度研究与破坏分析奠定了基础.
Xiaoping theory a nd the im portant t houg ht of the thre e represe nts and the scientific Outlook on devel opment. Such changes w ere made, i s conducive t o implementi ng the i nnovati on of Marxi sm in China, e spe cially the scie ntific concept of development the strategic task of arming the w hol e party, play grass-r oots organizati ons i n prom oting the scientific Outlook on devel opment i