| 含银纹的高聚物裂纹扩展 |
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| 引用本文： | 杨挺青,左朝凤,安群力.含银纹的高聚物裂纹扩展[J].高分子材料科学与工程,2000,16(6):32-35. |
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| 作者姓名： | 杨挺青 左朝凤 安群力 |
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| 作者单位： | 华中理工大学力学系,湖北,武汉,430074 |
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| 基金项目： | 国家自然科学基金资助项目!(196 32 0 30 ) |
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| 摘 要： | 根据已有的实验结果，考虑银纹损伤演变规律，假设裂尖银纹模型，导出Ⅰ型裂纹准静态下裂纹尖端银纹增长的微分方向和稳态扩展的方程，研究了裂纹长度及其扩展速度随时间的演变规律，初步分析了银纹损伤区平均，应力的变化，对含Ⅰ型裂纹ＰＭＭＡ的寿命进行了探讨。
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| 关 键 词： | 银纹损伤 裂纹扩展 高聚物 聚甲基丙烯酸甲酯 |
| 文章编号： | 1000-7555(2000)06-0032-04 |
| 修稿时间： | 1999年8月11日 |
CRACK GROWTH OF POLYMRES WITH CRAZE DAMAGE |
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| YANG Ting-qing,ZUO Chao-feng,AN Qun-li.CRACK GROWTH OF POLYMRES WITH CRAZE DAMAGE[J].Polymer Materials Science & Engineering,2000,16(6):32-35. |
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| Authors: | YANG Ting-qing ZUO Chao-feng AN Qun-li |
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| Abstract: | Crack growth of polymers with craze damage has been studied in this paper. According to the previous experimental results, a model was proposed to consider damage in craze zone at model I crack tip of PMMA. Stress distribution in craze zone is shown to be non uniform and time dependent under creep condition. Velocity of crack growth varies with time and depends upon the initial crack length. Numerical results are coinciding with former experiments. Some significant conclusions are drawn. |
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| Keywords: | damage craze crack growth polymer PMMA |
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