A Relationship Between Restraint Effect of Weldment and Crack Initiation Characteristics

J. Ocean Eng. Technol. 2003;17(2):14-20.

용접구조물의 구속효과와 균열발생특성간 상관관계

이제명,백점기,윤동렬

부산대학교 조선해양공학과,부산대학교 조선해양공학과,삼성중공업(주) 조선플랜트 연구소

Keywords: Finite Element Method, Restraint Intensity, Diffusible Hydrogen, Preheating Temperature, Welding Induced Crack

핵심용어: 유한요소법, 구속도, 확산성수소, 예열온도, 용접유기균열

Abstract

In this paper, a practical design criteria for judgement of crack occurrence in weldments is presented as a function of typical welding parameters, such as diffusible hydrogen, restraint intensity, and preheating temperature. The elastic analyses using the finite element techniques are employed in order to quantify the restraint intensities, numerically. Systematic experiments are also conducted in order to investigate the propensity of crack to typical welding parameters. The results of numerical estimation using the proposed method for the experimental specimens show the usefulness as a practical tool in welding induced crack problems with extensive uncertainties. Systematic experiments are also conducted in order to investigate the propensity of crack to typical welding parameters. The results of numerical estimation using the proposed method for the experimental specimens show the usefulness as a practical tool in welding induced crack problems with extensive uncertainties.