一种管道塑性损伤变形修正方法
By dividing the pipe cross-section into rigid and plastic regions, correcting the size of the rigid region, and combining it with the finite element verification method, the problem of inaccurate force-displacement response curves in existing technologies has been solved, achieving higher precision pipe structure analysis.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG PROVINCIAL SPECIAL EQUIP INSPECTION & RES INST
- Filing Date
- 2026-04-01
- Publication Date
- 2026-07-17
AI Technical Summary
In the process of lateral crushing deformation of the pipeline cross-section, the existing technology does not consider the stiffened region, resulting in an underestimation of the force value and an inaccurate force-displacement response curve, making it impossible to accurately assess the pipeline's ability to resist deformation damage.
A continuous correction model for the stiffened region is proposed. By dividing the pipe cross-section into rigid and plastic regions, the size of the stiffened region is corrected by using the finite element method and combining constitutive models of different materials, and an accurate force-displacement response curve is obtained.
It significantly improves the calculation accuracy of the crushing force-displacement response curve, is applicable to both circular and elliptical tubes, simplifies the finite element analysis process, enhances analysis efficiency, and achieves model interpretability through the UMAT subroutine.
Smart Images
Figure CN121960068B_ABST