| 船体表面应力腐蚀问题的一种无网格计算方法研究 |
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| 引用本文： | 唐志波. 船体表面应力腐蚀问题的一种无网格计算方法研究[J]. 船舶力学, 2011, 15(6) |
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| 作者姓名： | 唐志波 |
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| 作者单位： | 浙江海洋学院,船舶与建筑工程学院,浙江舟山,316004 |
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| 基金项目： | Supported by ZJNSF under award No.Y507197; Education Department under award No.20061137 |
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| 摘 要： | 文章采用无网格方法(MLPG)中最简单的MLPG5技术,对船舶表面微裂缝在腐蚀工作环境中向内扩展情形进行了数值计算模拟,计算中假设了船体材料为各向同性,并引入了线弹性假设。对比以往的有限元计算方法,发现处理裂缝扩展的数值计算问题时,无网格计算方法显示了其独特的优越性。同时,根据材料特性、外荷载以及温度等参数的变化,文中分别描述了三种可能的裂缝扩展方式:裂缝钝化、稳态以及非稳态的快速破环等。
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| 关 键 词： | 腐蚀 MLPG 应力腐蚀耦合 静态疲劳 |
A Meshless Numerical Approach for Stress-Assited Corrosion on Ship Body |
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| TANG Zhi-bo. A Meshless Numerical Approach for Stress-Assited Corrosion on Ship Body[J]. Journal of Ship Mechanics, 2011, 15(6) |
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| Authors: | TANG Zhi-bo |
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| Affiliation: | TANG Zhi-bo(School of Naval Architecture and Civil Engineering,Zhejiang Ocean University,Zhoushan 316004,China) |
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| Abstract: | The evolution of a crack-like defect that propagates by stress driven corrosion on ship body,with assumption of an isotropic,linear elastic solid,is simulated by applying Meshless Local Petrov-Galerkin(MLPG) method,where the simplest MLPG5 method has been adopted.Comparing with former simulation results,it is found that,when handling crack related numerical simulation,MLPG method is much more convenient than conventional finite element method.Depending on material properties,loading,and temperature,the thre... |
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| Keywords: | corrosion MLPG stress-assisted static fatigue |
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