一种弯曲箱型钢构件残余应力测量及模型建立方法
By combining low-heat-input processing and high-precision chord length measurement with three-dimensional topography scanning, the problems of error and cost in measuring residual stress in bent box-section steel components were solved. This enabled high-precision full-field measurement and the establishment of a three-dimensional spatial variation model, improving measurement accuracy and engineering practicality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SICHUAN PROVINCIAL ARCHITECTURAL DESIGN & RES INST
- Filing Date
- 2026-05-19
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for measuring residual stress in bent box-section steel members suffer from large errors or high costs. In particular, the traditional strip cutting method has inherent errors in bent members, while non-destructive methods are costly and difficult to obtain full-field distribution in the depth direction.
The test specimen is separated by a low-heat-input processing method. Combined with high-precision chord length measurement and three-dimensional morphology scanning, the error caused by the actual strain and geometric morphology changes of the material is separated through the "dual-track measurement-data fusion" technical path. The geometric correction is performed by using the component spatial curvature morphology formula obtained by three-dimensional scanning, so as to achieve high-precision full-field measurement.
It has achieved high-precision measurement of residual stress in bent box-shaped steel components, reduced errors introduced by geometric changes, obtained the full-field stress distribution in the depth direction of the component, and established a residual stress model that can reflect three-dimensional spatial variation, thus improving measurement accuracy and engineering practicality.
Smart Images
Figure CN122217526B_ABST