珍珠层结构的应力、应变和J积分有限元分析  

Finite element analysis on structure stress,strain and J integral of nacreous layer

作　　者：胡章咏[1] 

机构地区：[1]鄂东职业技术学院,湖北黄冈438000

出　　处：《兵器材料科学与工程》2014年第1期101-103,共3页Ordnance Material Science and Engineering

摘　　要：利用有限元方法分析了珍珠层裂纹的微观应力场,比较珍珠层最小结构单元在不同边长和厚度下的J积分。结果表明:珍珠层裂纹尖端应力集中小,分布范围广;天然结构参数下,珍珠层J积分最大。珍珠层最小结构单元有可能存在最优形状比,使材料达到强度与韧性的最佳配合,从而有可能用低强度的材料通过合适的大小和宽厚比、合适的制备方法得到性能优异的层状复合材料。The distribution of stress and strain around the tip of crack in nacreous layer was analyzed based on finite element method; J integrations of nacreous layer with different length and thickness elements were compared. It indicates that the concentration of stress around the tip of crack is widely distributed. The J integration of the natural scaled elements exhibits the maximum value. Therefore, the microstructure element of nacreous layer is likely to have optimal shape, which leads to the optimal toughness as well as high strength. So it is possible to prepare muhilayered composites of high mechanical property with low strength material through optimal method and microstructure element.

关 键 词：有限元分析 珍珠层 层状复合材料J积分 

分 类 号：TB39[一般工业技术—材料科学与工程]