| 李业媛， 于培师， 董淑宏， 赵军华.有机玻璃表面裂纹疲劳扩展仿真研究[J].轻工机械,2021,39(2):35-40 |
| 有机玻璃表面裂纹疲劳扩展仿真研究 |
| Simulation Study on Fatigue Growth of Surface Crack for Plexiglass |
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| DOI：10.3969/j.issn.1005 2895.2021.02.007 |
| 中文关键词: 有机玻璃 疲劳寿命 表面裂纹 7点递增多项式法 非穿透曲线裂纹 |
| 英文关键词:plexiglass fatigue life surface crack seven point incremental polynomial method non penetrating curve crack |
| 基金项目:国家自然科学基金 (11972171)；江苏省杰出青年基金(BK20180031)；中国博士后科学基金(2018M630513)。 |
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| 中文摘要: |
| 针对有机玻璃构件在服役过程中常因交变载荷而导致表面裂纹的产生和疲劳扩展，进而引起断裂的行为，课题组通过仿真研究来预测有机玻璃的表面裂纹疲劳扩展寿命。采用7点递增多项式法拟合疲劳裂纹扩展速率得到材料参数；基于裂纹尖端应力场分析软件，将穿透直裂纹测定的材料参数准确应用到表面裂纹的寿命预测上；采用表面裂纹疲劳扩展试验用于验证仿真结果。研究结果表明利用该方法预测的表面裂纹扩展寿命、裂纹扩展形貌与试验吻合较好。该项研究为有机玻璃结构的损伤容限设计提供了一定的参考。 |
| 英文摘要: |
| Aiming at the problems of plexiglass components that the surface cracks and fatigue growth caused by alternating loads in the service process, which leads to the behavior of fracture, the system simulation study was used to predict the surface fatigue crack growth life of plexiglass. The seven point incremental polynomial method was used to fit the fatigue crack growth rate to obtain the material parameters; based on the crack tip stress field analysis software, the material parameters measured by straight crack penetration were accurately applied to the life prediction method of surface cracks; the surface crack fatigue growth test was carried out to verify simulation results. The research results show that the surface crack growth life and crack growth morphology predicted by this method are in good agreement with the test. This research provides a certain reference for the damage tolerance design of plexiglass structure. |
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