Methodology to assess integrity with application to collector copper lamellas

被引：2

作者：

Marsavina, L. ^{[1
]}

Susan-Resiga, R. ^{[1
]}

Faur, N. ^{[1
]}

Negru, R. ^{[1
]}

机构：

[1] Politehn Univ Timisoara, Fac Mech Engn, Timisoara 300222, Romania

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2010年 / 53卷 / 02期

关键词：

Copper lamellas; Notch stress intensity factor; Failure assessment diagram; Crack propagation; STRESS INTENSITY FACTOR; FRACTURE-TOUGHNESS; FATIGUE; NOTCHES; COMPONENTS; STRENGTH; FIELDS; CRACKS;

D O I：

10.1016/j.tafmec.2010.03.004

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The performance of engineering components and structures is strongly influenced by the interaction between design, manufacture and materials. A methodology to assess the integrity of a circular collector is presented by investigating the failure of copper lamellas. The investigated circular collector, having 315 copper lamellas, is one of the main parts of an electric motor. The fracture of the copper lamellas was observed in normal operation. This unexpected fracture required an investigation of the fracture origin, in order to improve the initial design. The numerical results of the finite element analysis on the stress field in the copper lamellas for the operating regimes, and the stress concentration effects are shown. Failure assessment diagram, based on notch stress intensity factor, was considered in order to estimate if crack initiation can occur. Finally a study of crack propagation will present comparatively the numerical obtained crack path against the one observed in-service. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：136 / 144

页数：9

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