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裂尖超钝化:实验、理论与数值模拟

杨卫, 郭田福, 傅增力

杨卫, 郭田福, 傅增力. 裂尖超钝化:实验、理论与数值模拟[J]. 力学学报, 1993, 25(4): 468-478. DOI: 10.6052/0459-1879-1993-4-1995-667
引用本文: 杨卫, 郭田福, 傅增力. 裂尖超钝化:实验、理论与数值模拟[J]. 力学学报, 1993, 25(4): 468-478. DOI: 10.6052/0459-1879-1993-4-1995-667
shu
CRACK TIP SUPERBLUNTING: EXPERIMENT, THEORY AND NUMERICAL SIMULATION[J]. Chinese Journal of Theoretical and Applied Mechanics, 1993, 25(4): 468-478. DOI: 10.6052/0459-1879-1993-4-1995-667
Citation: CRACK TIP SUPERBLUNTING: EXPERIMENT, THEORY AND NUMERICAL SIMULATION[J]. Chinese Journal of Theoretical and Applied Mechanics, 1993, 25(4): 468-478. DOI: 10.6052/0459-1879-1993-4-1995-667
shu
杨卫, 郭田福, 傅增力. 裂尖超钝化:实验、理论与数值模拟[J]. 力学学报, 1993, 25(4): 468-478. CSTR: 32045.14.0459-1879-1993-4-1995-667
引用本文: 杨卫, 郭田福, 傅增力. 裂尖超钝化:实验、理论与数值模拟[J]. 力学学报, 1993, 25(4): 468-478. CSTR: 32045.14.0459-1879-1993-4-1995-667
shu
CRACK TIP SUPERBLUNTING: EXPERIMENT, THEORY AND NUMERICAL SIMULATION[J]. Chinese Journal of Theoretical and Applied Mechanics, 1993, 25(4): 468-478. CSTR: 32045.14.0459-1879-1993-4-1995-667
Citation: CRACK TIP SUPERBLUNTING: EXPERIMENT, THEORY AND NUMERICAL SIMULATION[J]. Chinese Journal of Theoretical and Applied Mechanics, 1993, 25(4): 468-478. CSTR: 32045.14.0459-1879-1993-4-1995-667
shu

裂尖超钝化:实验、理论与数值模拟

  • 清华大学工程力学系,100084

CRACK TIP SUPERBLUNTING: EXPERIMENT, THEORY AND NUMERICAL SIMULATION

  • 清华大学工程力学系,100084

摘要

    摘要
  • 摘要: 本文报道了在改性聚丙烯裂尖平面应变段发生超钝化的实验发现。利用环向冷拉模型,可说明裂尖超钝化的形成取决于冷拉传播速率与加载率之比。裂尖超钝化可使材料韧性,尤其是冲击韧性的改善,达到一个新的水平。本文在超弹性-粘塑性各向异性损伤的有限变形本构模型下进行了详尽的数值计算。模拟结果成功地再现了裂尖超钝化的基本特征。
    Abstract: Experimental revelation of superblunting along plane strain predominant crack tip segment is reported here for modified polyproplene. As elucidated by a heuristic model of progressive circumferential cold-draw the formation of superblunting crack tip depends critically on the ratio between the cold -draw propagation speed and the loading speed, and contributes significantly to the material toughening,especially for the improvement on impact toughness. Detailed numerical calculations are conducted based on a...
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  • 刊出日期:  1993-07-24

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