Ratcheting - Experiments on Structural Elements - Practical Appraisal of Progressive Distortion

摘要

Fron the results of numerous ratchet tests carried out at Saclay, above and in the creep range (from room temperature till 650 exp 0 C), a practical method for appraisal of ratcheting is proposed. It is based on the use of an effective primary stress known with the help of an efficiency diagram. At the present time, a conservative design curve has been chosen as it appears when analysing other experimental results published in the literature. Improvements of this curve seems possible by further works, involving new tests and more careful analysis. (Atomindex citation 13:675705)