Design Theory and Lifetime Prediction of Extrusion Container Subjected to Creep-fatigue Interaction

doi:10.3901/JME.2017.16.163

Abstract

Abstract: Large extrusion container services in the condition of high temperature and cyclic pressure, which results in creep-fatigue interaction. This leads to deformation and crack of the container mostly and affects the product efficiency and cost of extrudate. This paper puts most concern on lifetime calculation method under fatigue-creep interaction. Based on the boundary condition of extrusion process, DDM method is employed to analyze the stress distribution of multilayer interference extrusion container. Fatigue damage and creep damage are calculated cycle by cycle according to S-N curve and creep constitutive model achieved by experiments until the critical value is reached. The proposed method is meaningful to predict the lifetime of container subjected to fatigue-creep interaction and can offer a reasonable amendment of shrinkage when changing liners, which can prolong the lifetime of the whole container to some extent.

Key words: creep-fatigue, damage, design theory, extrusion container, lifetime assessment

CLC Number:

TG156

MA Ling, LUO Yuanxin, SONG Zongtao, WANG Yongqin. Design Theory and Lifetime Prediction of Extrusion Container Subjected to Creep-fatigue Interaction[J]. Journal of Mechanical Engineering, 2017, 53(16): 163-172.

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