| Asymptotic analysis of mode Ⅰ propagating crack-tip field in a creeping material |
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| 引用本文： | WANGZhen-qing ZHAOQi-cheng 郭正刚 FUZhang-jian.Asymptotic analysis of mode Ⅰ propagating crack-tip field in a creeping material[J].船舶与海洋工程学报,2003,2(1):76-80,86. |
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| 作者姓名： | WANGZhen-qing ZHAOQi-cheng 郭正刚 FUZhang-jian |
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| 作者单位： | SchoolofCivilEngineering,HarbinEngineeringUniversity,Harbin150001,China |
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| 摘 要： | 0 INTRODUCTIONWeknowthatthemetalmaterialwillbegincreepwhenthetemperatureishigherthan 30 per centoftheirsmeltingpoint.Foraturbine,adieselengine,anaerospacestructureandothermotivepowermechanisms,thematerialsstillworkwhentheirtemperaturesovershootthecreepthresholdval ue.Thecreepdeformationwilloccuratnormaltem peratureforthepolymerstructures(e.g .plasticspipingelements) .Inthecaseofcreepingthefrac tureofthestructureoccursduetocreepfractureandcreepcrackgrowth.Thereforetheresearchonthecrackgro…
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| 关 键 词： | 渐近分析 裂缝尖端 蠕变材料 粘弹性系数 准静态特征 动力学特征 |
Asymptotic analysis of mode Ⅰ propagating crack-tip field in a creeping material |
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| WANG Zhen-qing,ZHAO Qi-cheng,LIANG Wen-yan,FU Zhang-jian.Asymptotic analysis of mode Ⅰ propagating crack-tip field in a creeping material[J].Journal of Marine Science and Application,2003,2(1):76-80,86. |
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| Authors: | WANG Zhen-qing ZHAO Qi-cheng LIANG Wen-yan FU Zhang-jian |
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| Abstract: | Adopting an elastic-viscoplastic, the asymptotic problem of mode I propagat ing crack-tip field is investigated. Various asymptotic solutions resulting from the analysis of crack growing programs are presented. The analysis results show that the quasi-statically growing crack solutions are the special case of the dynamic propagating solutions. Therefore these two asymptotic solutions can be unified. |
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| Keywords: | elastic-viscoplastic material viscosity coefficient quasi-static growth dynamic propagating |
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