Determination of artificial defects in material under monotonic tension by the use of FEM and DIC methods

被引：4

作者：

Szymczak, Tadeusz ^{[1
]}

Kowalewski, Zbigniew ^{[2
]}

Brodecki, Adam ^{[1
]}

机构：

[1] Motor Transport Inst, PL-03301 Warsaw, Poland

[2] Inst Fundamental Technol Res, PL-02106 Warsaw, Poland

来源：

MATERIALS TODAY-PROCEEDINGS | 2016年 / 3卷 / 04期

关键词：

Monotonic tension; holes; steel; stress concentration factor; maximum stress; yield point; ductility; FEM; DIC; FATIGUE; NOTCHES; HOLE;

D O I：

10.1016/j.matpr.2016.03.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The paper concerns numerical and experimental investigations carried out for determination of an influence of holes on material behaviour under monotonic tension. The 40Cr steel commonly applied in automotive and power plant branches of industry was tested. The analysis was performed by the use of analytical and Finite Element Method calculations. It enabled identification of stress concentration/maximum stress versus hole diameter relationships, and the HMH stress distribution. Full-field contactless Digital Image Correlation (DIC) system was used for capturing the effective strain variations from the beginning of test up to specimen fracture. It enabled us to indicate the most important stress concentrator, and moreover, distribution of the HMH effective strain in 2D coordinate system. A comparison of tensile characteristic obtained by means of smooth and perforated specimens showed 70% reduction of yield point and 50% lowering of elongation as an effect of the artificial defects introduced. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1171 / 1176

页数：6