CAJ | 학술논문

目前多轴疲劳理论难以用于实际工程中焊接结构的疲劳寿命评估.文章将等效热点应力法与双参数临界面理论相结合,提出了一种能够应用于复杂焊接结构的多轴疲劳寿命评估方法.分别阐述了双参数临界面法的损伤参数、控制方程以及等效热点应力的定义,给出了焊接结构多轴疲劳寿命的评估过程,并应用有限元数值模拟验证了该方法的可行性.
목전다축피로이론난이용우실제공정중한접결구적피로수명평고.문장장등효열점응역법여쌍삼수림계면이론상결합,제출료일충능구응용우복잡한접결구적다축피로수명평고방법.분별천술료쌍삼수림계면법적손상삼수、공제방정이급등효열점응력적정의,급출료한접결구다축피로수명적평고과정,병응용유한원수치모의험증료해방법적가행성.
It is hard to use the current mutiaxial fatigue theory for real welded structures in engineering. An approach for multiaxial fatigue life assessment of complex welded structures is proposed, by combining the equivalent hot spot stress method and the bi-parametrical critical plane theory. The damage parameters and controls equations of the critical plane theory and the definition of the equivalent hot spot stress method are described, respectively. A procedure of the multiaxial fatigue life assessment for welded structures is pre-sented, and the feasibility of the proposed approach is verified by the use of finite element analysis.