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首页> 外文会议>International Conference on Offshore Mechanics and Arctic Engineering 2007(OMAE2007) vol.4; 20070610-15; San Deigo,CA(US) >FINITE ELEMENT VALIDATION STUDIES OF BS7910 FAD METHOD APPLIED TO WELDED SHS JOINTS
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FINITE ELEMENT VALIDATION STUDIES OF BS7910 FAD METHOD APPLIED TO WELDED SHS JOINTS

机译：焊接SHS接头BS7910 FAD方法的有限元验证

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摘要

The failure assessment diagram (FAD) has now been widely accepted and used for the assessment of defects found in metallic structures. In BS7910 (2005), the use of this method for offshore structures has been validated for a range of joint geometries. But these validations are only applicable for circular hollow section (CHS) welded joints. For rectangular or square hollow section (RHS or SHS) joints, there are very few references available in the literature. In this paper, systematic investigations have been carried out for the validation and verification of the FAD curves for SHS T-joints. FAD curves for a wide range of welded SHS T-joints containing surface cracks have been established using the fracture mechanics data generated from the finite element analyses. The range of (3 ratio of these joints is from 0.3 to 0.8. Therefore, the failure mode is constrained in the chord face yielding. The influence of residual stresses on the plastic collapse load and the FAD curves has also been analyzed. The reduction factor used to calculate the plastic collapse load of the SHS T-joints containing cracks have been quantitatively examined, and the use of the BS7910 (2005) Level 2A FAD for SHS joints containing surface cracks has been validated accordingly.
机译：失效评估图（FAD）现在已被广泛接受并用于评估金属结构中发现的缺陷。在BS7910（2005）中，已针对多种接缝几何形状验证了此方法在海上结构中的使用。但是，这些验证仅适用于圆形空心截面（CHS）焊接接头。对于矩形或正方形空心截面（RHS或SHS）接头，文献中很少有参考文献可用。本文对SHS T型接头的FAD曲线进行了验证和验证。已使用有限元分析生成的断裂力学数据建立了包含表面裂纹的各种焊接SHS T型接头的FAD曲线。 （这些接头的3个比率的范围是从0.3到0.8。因此，破坏模式被限制在弦面屈服中。还分析了残余应力对塑性破坏载荷和FAD曲线的影响。减小因子用于计算包含裂纹的SHS T形接头的塑性塌陷载荷的方法已经过定量检查，并且相应地验证了BS7910（2005）Level 2A FAD用于包含表面裂纹的SHS接头的用途。

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