Finite Element Analysis of the Limit Load of Straight Pipes with Local Wall-Thinning Defects under Complex Loads

Applied Sciences

Juncai Ding¹  Kaiming Lin¹  Bingjun Gao²  Shuo Liu²  Yan Li² 

[1] Guangdong Institute of Special Equipment Inspection and Research Zhongshan Branch, Zhongshan 300072, China;School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China;

关键词: straight pipe;    local wall thinning;    complex loads;    limit load;   

DOI  :  10.3390/app12104850

来源: DOAJ

【 摘 要 】

Local wall thinning is a common defect on the surface of pipelines, which can cause damage to the pipeline under complex pipeline loads. Based on the study on the limit load of straight pipes with defects, the nonlinear finite element method was used to analyze the limit load of straight pipes with local wall-thinning defects under internal pressure, bending moment, torque, axial force, and their combinations, and the empirical limit-load equations of straight pipes with local wall-thinning defects under single and complex loads were fitted. Based on the allowable load on the equipment nozzles, the influences of torque and axial force on the load-bearing capacity of straight pipes with local wall-thinning defects were quantitatively analyzed. For medium and low-pressure equipment, the load-bearing capacity was reduced by 0.59~1.44% under the influence of torque, and by 0.83~1.80% under the influence of axial force. For high-pressure equipment, the load-bearing capacity was reduced by 10.07~20.90% under the influence of torque, and by 2.01~12.40% under the influence of axial force.

【 授权许可】

Unknown