• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Computer simulation of conic-shaped patterns on fracture surfaces of polymers
【24h】

Computer simulation of conic-shaped patterns on fracture surfaces of polymers

机译：聚合物断裂表面圆锥形图案的计算机模拟

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Fractographic analysis, using scanning electron microscopy, is an important method to study polymer fracture behavior. There are several distinctive patterns on fracture surfaces, such as radial striations, regularly spaced 'rib' markings, and conic-shaped patterns. The conic-shaped pattern is the intersection locus of a moving planar crack front and a radially growing circular craze or secondary crack front. In this paper, the effects of the ratio of crack velocity to growing craze or secondary crack velocity on the shape of intersection loci are discussed using computer simulations. It is shown that when the ratio of crack velocity to craze or secondary crack velocity ((a) over dot/ (c) over dot) increases progressively, the fracture surface pattern changes from a parabola or a prolate parabola to an ellipse and finally to an approximate circle. Therefore, the crack growth velocity can be estimated based on the fracture surface morphology and then related to the fracture processes as well as to the ductile-brittle transition or toughening mechanism of brittle polymers. (C) 2003 Wiley Periodicals, Inc. [References: 16]
机译：使用扫描电子显微镜的分形分析是研究聚合物断裂行为的重要方法。断裂表面上有几种独特的图案，例如径向条纹，规则排列的“肋”标记和圆锥形图案。圆锥形图案是移动的平面裂纹前沿和径向生长的圆形裂纹或次级裂纹前沿的交点。在本文中，使用计算机模拟讨论了裂纹速度与成长裂纹比率或二次裂纹速度之比对相交轨迹形状的影响。结果表明，当裂纹速度与裂纹速度或次要裂纹速度之比（（a）在点上/（c）在点上）逐渐增加时，断裂表面的形态从抛物线或扁长抛物线变为椭圆形，最终变为一个近似的圆。因此，可以基于断裂表面形态来估计裂纹扩展速度，然后将其与断裂过程以及脆性聚合物的韧性-脆性转变或增韧机理相关联。 （C）2003 Wiley Periodicals，Inc. [参考：16]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号