| 热冲击下层状梯度材料表面裂纹的能量释放率 |
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| 引用本文： | 贺鹏飞,贾安珏,郑百林.热冲击下层状梯度材料表面裂纹的能量释放率[J].同济大学学报(自然科学版),2003,31(2):182-185. |
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| 作者姓名： | 贺鹏飞 贾安珏 郑百林 |
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| 作者单位： | 同济大学,固体力学教育部重点实验室,上海,200092;同济大学,工程力学与技术系,上海,200092 |
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| 基金项目： | 同济大学理科科技发展基金资助项目 |
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| 摘 要： | 用数值方法分析了具有表面裂纹的层状梯度材料在热冲击荷载下 ,裂纹所对应的能量释放率随时间变化的规律 ,着重讨论了呈现梯度变化的材料力学和热学参数对能量释放率的影响 .结果发现和均匀材料相比 ,呈梯度变化的热膨胀系数使裂纹的能量释放率有非常大的增加 ,而其它材料参数的变化影响很小
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| 关 键 词： | 梯度材料 热冲击 表面裂纹 能量释放率 层状材料 |
| 文章编号： | 0253-374X(2003)02-0182-04 |
| 修稿时间： | 2002年3月19日 |
Energy Release Rates of Surface Crack in Functionally Graded Laminates under Thermal Shock |
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| HE Peng-fei ,JIA An-jue ,ZHENG Bai-lin.Energy Release Rates of Surface Crack in Functionally Graded Laminates under Thermal Shock[J].Journal of Tongji University(Natural Science),2003,31(2):182-185. |
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| Authors: | HE Peng-fei JIA An-jue ZHENG Bai-lin |
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| Institution: | HE Peng-fei 1,2,JIA An-jue 1,2,ZHENG Bai-lin 1,2 |
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| Abstract: | Energy release rates of a surface crack in functionally graded laminates under thermal shock are analyzed numerically.Influence of the thermal and mechanical parameters of the laminates on the energy release rates of the crack is discussed.It is found that,in comparison with the case of homogeneous material,the energy release rate for the case of the functionally graded laminates increases greatly,and the difference of the thermal expansion of the laminates is a main factor to increase the energy release rate. |
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| Keywords: | functionally graded materials thermal shock surface crack energy release rate laminates |
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