期刊文献+

MDYB-3有机玻璃裂纹扩展温度效应试验研究 被引量:3

EXPERIMENTAL STUDY OF TEMPERATURE EFFECT ON FATIGUE CRACK FOR MDYB-3
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摘要 随着对飞机性能要求的提高,对机用有机玻璃的要求愈来愈高。目前飞机舱盖玻璃表面温度在-55℃-100℃范围内变化,因此,研究飞机舱盖MDYB-3有机玻璃温度效应具有十分重要的意义。文中采用CT(compact tension)试样对MDYB-3有机玻璃在-50℃-90℃范围内进行裂纹扩展试验,研究温度对MDYB-3有机玻璃裂纹扩展速率的影响。应用线弹性断裂力学理论,分析不同环境温度下裂纹扩展速率与等效应力强度因子ΔK之间的关系。试验结果表明,MDYB-3有机玻璃随着温度升高,裂纹扩展速率减小,断裂韧度增大;低温时MDYB-3有机玻璃表现为脆性,裂纹扩展十分平滑,断面垂直于拉伸方向,温度较高时MDYB-3有机玻璃表现为粘性,裂纹扩展面凹凸不平。 The tests on fatigue crack growth of MDYB-3 PMMA(polyethylene Methacrylate) are carried out in the present work. The fatigue crack growth behavior of most polymers is sensitive to temperature. In this study, the fatigue crack growth rate data are obtained by test at temperature range - 50℃ - 90℃ and frequency at I Hz. Applying the linear elastic fracture mechanics to the experimerit data of PMMA, the dependency of fatigue crack growth behavior on temperature is revealed.
出处 《机械强度》 EI CAS CSCD 北大核心 2007年第5期820-823,共4页 Journal of Mechanical Strength
关键词 有机玻璃 裂纹扩展速率 温度 应力强度因子 PMMA(polyethylene Methacrylate) Fatigue crack growth Temperature Stregs intensity factor
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参考文献7

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共引文献11

同被引文献24

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