Analysis of fatigue crack propagation in laser sintering metal

被引：2
|
作者：
Borrego, L. F. P. [1 ,2 ]
Antunes, F. V. [1 ]
Ferreira, J. A. M. [1 ]
Costa, J. D. [1 ]
Capela, C. [1 ,3 ]
机构：
[1] Univ Coimbra, Dept Mech Engn, CEMMPRE, Rua Luis Reis Santos, P-3030788 Coimbra, Portugal
[2] Inst Politecn Coimbra, Dept Mech Engn, ISEC, Rua Pedro Nunes, P-3030199 Coimbra, Portugal
[3] Inst Politecn Leiria, Dept Mech Engn, ESTGMorro Lena Alto Vieiro, P-2400901 Leiria, Portugal
来源：
2ND INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY, ICSI 2017 | 2017年 / 5卷
关键词：
Laser sintering material; fatigue crack propagation; plastic CTOD; ALUMINUM-ALLOYS; CLOSURE; STRESS; MODEL;
D O I：
10.1016/j.prostr.2017.07.123
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Laser sintering metal has recently been used in the manufacture of components for different applications like aerospace or medicine. The approach to engineering design based on the cracks propagation assumption applying the concepts of linear elastic fracture mechanics (LEFM) is commonly used for aerospace engineering. However, fatigue crack propagation is linked to irreversible and non-linear mechanisms at the crack tip, therefore LEFM parameters can be successfully replaced by non-linear crack parameters, namely the plastic CTOD. A model linking da/dN with plastic CTOD is proposed here to characterize fatigue crack propagation. A comparison is made with other materials showing that for the same plastic CTOD the laser sintering material has a relatively large crack growth rate. (C) 2017 The Authors. Published by Elsevier B.V.
引用
收藏
页码：239 / 246
页数：8
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