Mathematical simulation of low cycle fatigue of high-loaded engine parts
作者机构：Central Institute of Aviation Motors2 Aviamotornaya st.Moscow 111116Russia
出 版 物：《Propulsion and Power Research》 (推进与动力（英文）)
年 卷 期：2018年第7卷第4期
页 面：277-287页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
主 题：Gas turbine engine Low cycle fatigue Nonisothermal plasticity Finite element modeling Durability modeling Cyclic loading
摘 要：The paper discusses main aspects of low cycle fatigue influence on the lifetime ofengine *** importance and history of the problem,the main experiments and the effectsimpacting the low cycle fatigue of structural materials are described.A hypothesis about theexistence of a thermomechanical surface of structural material,generalized to the case of acyclical loading was used to approximate the loops of cyclic nonisothermal elastoplasticdeformation *** cyclic deformation curve model is based on the following threeparameters:the elastic modulus during unloading,the Bauschinger effect and the conversionparameter of the nonlinear part of its first *** model also accounts for theaccumulated plastic strain,as well as the testing *** criterion of durability isformulated,based on the dependence between the number of halfcycles to failure and theaccumulated plastic *** theory of plasticity,generalized to the case ofcyclic deformation,in combination with the durability model and technology ofdyingelements is applied to the finite element analysis of low cycle fatigue of gas turbine *** results of calculations are demonstrated.
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