| 基于虚拟裂纹闭合法的铝合金疲劳裂纹扩展分析 |
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| 引用本文： | 牟秀军,刘小忠,刘涛,陈定海.基于虚拟裂纹闭合法的铝合金疲劳裂纹扩展分析[J].海军航空工程学院学报,2014,29(2):163-167. |
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| 作者姓名： | 牟秀军 刘小忠 刘涛 陈定海 |
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| 作者单位： | [1]91049部队,山东青岛266102 [2]海军航空工程学院青岛校区,山东青岛266041 |
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| 摘 要： | 基于虚拟裂纹闭合法，以Abaqus有限元软件为平台，编写了用户单元子程序，计算出不同裂纹扩展阶段的应变能释放率和裂纹尖端应力强度因子。结合Paris公式，建立了有限元裂纹扩展模型，可仿真再现疲劳裂纹扩展过程，预测裂纹扩展寿命，为损伤容限评估方法提供一种技术支持。
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| 关 键 词： | 铝合金 虚拟裂纹闭合法 疲劳裂纹 |
Analysis of Aluminum Alloy Fatigue Crack Growth Based on Virtual Crack Close Technique |
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| MU Xiu-jun,LIU Xiao-zhong,LIU Tao and CHEN Ding-hai.Analysis of Aluminum Alloy Fatigue Crack Growth Based on Virtual Crack Close Technique[J].Journal of Naval Aeronautical Engineering Institute,2014,29(2):163-167. |
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| Authors: | MU Xiu-jun LIU Xiao-zhong LIU Tao and CHEN Ding-hai |
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| Institution: | 1. The 91049^th Unit of PLA, Qingdao Shandong 266102, China; 2. Qingdao Branch, NAAU, Qingdao Shandong 266041, China) |
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| Abstract: | The strain energy rate and the crack tip stress intensity factor were computed on different crack growth stage based on virtual crack close technique. The user subroutine was complied using Abaqus finite element software. The finite element model of crack propagation was established by the Paris formula, then the fatigue crack rowth process was simu- lated, and the crack growth life was predicted. It can provide technical support for damage tolerance evaluation method. |
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| Keywords: | aluminum alloy virtual crack close technique fatigue clack |
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