论压溃强度试验

详细信息

DISCUSSION ON RADIAL CRUSHING STRENGTH TESTING

摘要: 根据平面曲粱受力分析,推导出压溃强度试验时圆环内外表面的正应力。内表面拉应力导致试样破坏,其过程与弯曲试验相似,σ₊/K值与圆环的几何尺寸R₂/R₁有关。当R₂/R₁≈0.87时,σ₊/K值为1.0,即测得的压溃值K等于弯曲强度σ_bb,还提出用圆环压溃法测定弯曲强度的修正公式。
- 压溃强度
Abstract: According to an analysis of planar camber beam under stress,the positive stress on the inner and outer surface of ring during its crushing strength testing has been deducted. The tension stress on the inner surface Caused damage to specimen with a process similar to that during bending testing and σ₊/K value is rebated to the seometric size of the ring R₂/R₁. In case of R₂/R₁=0.87,the σ₊/Kvalue equals to 1.0,i. e. the crushing value K obtained through testing equals to bending strength σ_bb. A modificed formula for bending strenth tested by ring crushing method has also been outlined.
- radial crushing