| 摘要: |
| 建立了基于结构应力定义的正面角焊缝抗剪强度理论,给出了新的焊缝抗剪强度计算公式,并基于该理论对焊缝抗剪强度相关问题进行了分析.结果表明,单向受剪等焊脚正面角焊缝的断裂角度理论值为22.5°,焊趾角度和受力状态均会影响断裂角度.另外焊趾角度为30°的单向受剪焊缝具有最大的承载能力,而双向受剪焊缝的承载能力比单向受力时的承载能力也明显提高.试验数据证明了该理论的正确性,该理论也为焊缝尺寸设计提供了理论基础. |
| 关键词: 结构应力 正面角焊缝 抗剪强度 断裂角度 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目(51405057);辽宁省教育厅科学研究一般资助项目(L2014182);国际合作资助项目(2010DFB80050-1);北车集团计划资助项目(2013NGA050) |
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| Shear strength analysis of transverse fillet welds based on structural stress method |
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NIE Chunge1, WEI Hongliang1, DONG Pingsha2, ZHAO Wenzhong1
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1.School of Traffic and Transportation Engineering, Dalian Jiaotong University, Dalian 116028, China;2.School of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor 48109, USA
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| Abstract: |
| A structural stress based shear strength theory was established for transverse fillet welds in this paper, the new equations for calculating shear strength of fillet welds were provided, and some problems about shear strength of fillet welds were investigated. The results show that, theoretical failure angle of welds subjected unidirectional shear force is 22.5°, and both weld toe angle and load condition could also affect failure angle. In addition, the weld with 30° weld toe angle subjected unidirectional shear force possesses maximum load capacity, and the load capacity of weld in biaxial loading is higher than which in unidirectional loading. The theory in this paper was verified by test data, and theoretical bases were provided for weld sizing. |
| Key words: structural stress transverse fillet weld shear strength failure angle |
