용접변형 고정도 예측을 위한 지배인자의 특정

초록

In carrying out the elastic-plastic analysis, four conditions (equilibrium equation, constitutive equation,condition of compatibility and yield condition) should be satisfied. In welding, the temperature largelychanged from a melting temperature to a room temperature. So, yield stress of materials largely changed,too. In particular, yield stress becomes about zero over 700℃. The analysis should be carried out under thecondition that equivalent stress generated in temperature increment ΔT did not exceed yield stress ofmaterials at high temperature over 700℃. It should be sufficiently recognized that the obtained resultswere not reliable if this condition was not satisfied.

키워드