Towards the characterization of fracture in thin-walled tube forming

被引：19

作者：

Centeno, Gabriel ^{[1
]}

Silva, Maria Beatriz ^{[2
]}

Alves, Luis M. ^{[2
]}

Vallellano, Carpoforo ^{[1
]}

Martins, Paulo A. F. ^{[2
]}

机构：

[1] Univ Seville, Dept Mech & Mfg Engn, Camino Descubrimientos S-N, Seville 41092, Spain

[2] Univ Lisbon, IDMEC, Inst Super Tecn, Av RoviscoPais, P-1049001 Lisbon, Portugal

来源：

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 2016年 / 119卷

关键词：

Tube forming; Fracture; Experimentation; Analytical modelling; Finite element modelling; CRITERION;

D O I：

10.1016/j.ijmecsci.2016.10.001

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper provides a simple and effective experimental procedure to determine the fracture strains and the critical values of ductile damage at the onset of failure by fracture in tube forming. The investigation is limited to crack opening in mode I (by tension) and combines experimentation in tube expansion with analytical modelling using membrane analysis, circle grid analysis and finite element modelling. The presentation is a step towards the characterization of fracture loci in tube forming and in understanding the conditions upon which necking does, or does not, precede failure by fracture in thin-walled tubes. It is showed that good engineering estimation of the fracture strains and of the critical ductile damage at the onset of fracture can be easily obtained from application of the proposed analytical model with experimental measurements of the expanded tube end radius at fracture.

引用

页码：12 / 22

页数：11

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