| 金属梯度材料应力强度因子研究 |
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| 引用本文： | 沈逸文. 金属梯度材料应力强度因子研究[J]. 科学技术与工程, 2012, 12(12): 2775-2779,2790 |
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| 作者姓名： | 沈逸文 |
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| 作者单位： | 南京航空航天大学机械结构力学及控制国家重点实验室,南京,210016 |
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| 摘 要： | 在金属梯度材料的制备与使用过程中,难免在内部会产生大量的微裂纹.这些微裂纹会逐步扩展演变成更大的裂纹,从而严重影响到整个构件的性能.因此研究金属梯度材料的断裂问题对材料的安全使用,优化设计和结构分析有着重大的实际意义.采用了有限元模拟结合交互式积分的方法分别计算得到了含有边缘裂纹及按任意角度变化的中心裂纹的金属梯度板的应力强度因子,并讨论了参数对其应力强度因子的影响规律,展望了其未来的发展.
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| 关 键 词： | 金属梯度材料、有限单元法、交互式积分、应力强度因子 |
| 收稿时间： | 2012-02-12 |
| 修稿时间： | 2012-02-12 |
The Stress Intensity Factor Analysis of Metal Gradient Materials |
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| shenyiwen. The Stress Intensity Factor Analysis of Metal Gradient Materials[J]. Science Technology and Engineering, 2012, 12(12): 2775-2779,2790 |
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| Authors: | shenyiwen |
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| Affiliation: | *(State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics,Nanjing 210016,P.R.China) |
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| Abstract: | During the use and preparation process of the metal gradient materials,there are large amounts of cracks internal the material,these cracks will seriously affect the performance of the component to the whole.So the fracture characteristics research of the metal gradient has great significance in safety usage,optimal design and structural analysis.The finite element method combine with the interaction integral were applied to calculate the SIFs.Two examples including respectively contains edge crack and center crack models are given which show the above method is convenient and accurate. |
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| Keywords: | metal gradient materials finite element method interaction integral stress intensity factor |
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