Application of multi-phase viscoplastic material modelling to computational welding mechanics of grade-S960QL steel

被引：2

作者：

Haeberle, Nicolas ^{[1
]}

Pittner, Andreas ^{[1
]}

Falkenberg, Rainer ^{[1
]}

Kahlcke, Ole ^{[1
]}

Rethmeier, Michael ^{[1
]}

机构：

[1] Bundesanstalt Mat Forsch & Prufung BAM, Unter Eichen 87, D-12205 Berlin, Germany

来源：

COMPTES RENDUS MECANIQUE | 2018年 / 346卷 / 11期

关键词：

Computational welding mechanics; S960QL; Cyclic hardening; Viscoplasticity; Complex low-cycle fatigue test; Satoh test; TRANSFORMATION PLASTICITY; BEHAVIOR; SIMULATION;

D O I：

10.1016/j.crme.2018.08.001

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The sound numerical prediction of welding-induced thermal stresses, residual stresses, and distortions strongly depends on the accurate description of a welded material's thermomechanical deformation behaviour. In this work, we provide experimental data on the viscoplastic deformation behaviour of a grade-S960QL steel up to a temperature of 1000 degrees C. In addition, amulti-phase viscoplastic material model is proposed, which accounts for the experimentally observed isothermal deformation behaviour of grade-S960QL steel base and austenitised material, as well as for athermal contributions that originate from solid-state phase transformations. The multi-phase viscoplastic and a classic rate-independent isotropic hardening material model were applied in the numerical simulations of both-ends-fixed bar Satoh tests and a single-pass gas metal arc weld. The influence of material modelling choices on the agreement between numerical simulation and experimental results is discussed, and recommendations for further work are given. (C) 2018 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

引用

页码：1018 / 1032

页数：15

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