本文基于试验和有限元模拟的方法研究裂纹圆管在弯曲载荷作用下的力学性能。通过三点弯曲试验方法探究裂纹圆管在不同裂纹长度和不同裂纹角度下的极限载荷，采用有限元模拟的方法与试验结果进行对比，并计算裂纹尺寸和撞头尺寸的影响。结果表明，随着裂纹长度的增加，裂纹圆管的承载能力降低，局部变形减少。裂纹角度为0°时是最危险的工况，裂纹角度为90°是最安全的工况。撞头撞击位置和撞头几何参数均会改变与裂纹圆管的接触面积，从而影响承载能力。
In this paper, the mechanical properties of cracked pipes under bending load are studied based on experiment and finite element simulation. Firstly, the ultimate loads of cracked pipes with different crack lengths and different crack orientations are investigated by three-point bending test. Then, the finite element simulation method is used to compare with the experimental results, and the influence of the crack size and the impactor size is calculated. The results show that with the increase of crack length, the bearing capacity and local deformation of the cracked pipe decrease. When the crack angle is , it is the most dangerous working condition, and when the crack angle is , it is the most safe working condition. The impact location and geometric parameters of the impactor will change the contact area with the cracked pipe, which affects the bearing capacity.
2022,44(6): 80-83 收稿日期：2021-07-16
DOI：10.3404/j.issn.1672-7649.2022.06.017
分类号：U663
作者简介：沈致远(1999-)，男，硕士研究生，研究方向为结构设计
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