| 喷涂层对十字接头焊趾裂纹应力强度因子的影响 |
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| 引用本文： | 张中平,霍立兴,王东坡,张玉凤. 喷涂层对十字接头焊趾裂纹应力强度因子的影响[J]. 焊接学报, 2006, 27(2): 85-88 |
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| 作者姓名： | 张中平 霍立兴 王东坡 张玉凤 |
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| 作者单位： | 天津大学,材料科学与工程学院,天津,300072;天津大学,材料科学与工程学院,天津,300072;天津大学,材料科学与工程学院,天津,300072;天津大学,材料科学与工程学院,天津,300072 |
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| 摘 要： | 利用有限元分析软件ANSYS分别建立了非承载十字接头焊趾裂纹的二维和三维断裂模型,并计算了焊趾裂纹尖端的应力强度因子.分析了等离子喷涂层弹性模量对裂纹尖端应力强度因子的影响,以及裂纹尺寸对裂纹尖端应力强度因子的影响.计算结果表明,等离子喷涂层使焊趾裂纹尖端应力强度因子明显降低.对于确定的裂纹尺寸、形状,裂纹尖端的应力强度因子随涂层弹性模量的增加而降低.当Ec/Ep=0.6,二维模型中a/t=0.125时,喷涂后裂纹尖端应力强度因子降低了62.5%;三维模型中a/t=0.125,a/c=0.2时,喷涂后裂纹尖端的应力强度因子降低了42.6%.
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| 关 键 词： | 应力强度因子 有限元分析 焊接接头 等离子喷涂 |
| 文章编号： | 0253-360X（2006）02-85-04 |
| 收稿时间： | 2005-06-20 |
| 修稿时间： | 2005-06-20 |
Effect of sprayed coatings on stress intensity factor of weld toe crack of cruciform welded joints |
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| ZHANG Zhong-ping,HUO Li-xing,WANG Dong-po and ZHANG Yu-feng. Effect of sprayed coatings on stress intensity factor of weld toe crack of cruciform welded joints[J]. Transactions of The China Welding Institution, 2006, 27(2): 85-88 |
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| Authors: | ZHANG Zhong-ping HUO Li-xing WANG Dong-po ZHANG Yu-feng |
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| Affiliation: | School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China,School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China,School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | Both two-dimensional and three-dimensional models were founded according to non-loaded cruciform welded joints.The stress intensity factors of weld toe cracks were calculated by using finite element analysis software ANSYS.The effects of elastic modulus of the sprayed coating and crack size on stress intensity factor was analyzed.The calculated results show that plasma sprayed coating is effective to decrease the stress intensity factor of weld toe.The stress intensity factor of a certain crack decreased while the elastic modulus of the sprayed coating increased.When E_c/E_p=0.6,the stress intensity factor of two-dimensional model decreases by 62.5%,and that of three-dimensional model decreases by 42.6%. |
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| Keywords: | stress intensity factor finite element analysis welded joints plasma spray |
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