利用示波冲击裂纹延性扩展位移预测CTOD特征值方法
By obtaining the crack ductile propagation displacement through oscilloscope impact testing and calculating the equivalent CTOD characteristic value, the problems of long test cycle and high cost of CTOD fracture toughness testing are solved, and the crack arrest performance of welded structures can be evaluated efficiently.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BAOSHAN IRON & STEEL CO LTD
- Filing Date
- 2022-06-30
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies have failed to effectively establish the correlation between oscilloscope Charpy impact testing and CTOD fracture toughness testing, resulting in long testing cycles, high costs, and high technical requirements for operators in CTOD fracture toughness testing, making it difficult to easily assess the crack arrest performance of welded structures.
By fabricating oscilloscope impact specimens and obtaining oscilloscope impact force-displacement curves, the crack ductile propagation displacement Vp is determined, and the crack mouth opening displacement Vg, which is equivalent to the CTOD fracture toughness test, is calculated using correlation formulas, thereby estimating the CTOD characteristic value.
The CTOD fracture toughness test procedure has been simplified, reducing operating costs and technical requirements, and improving the efficiency and accuracy of evaluating the crack arrest performance of welded structures.
Smart Images
Figure CN117368006B_ABST