Crack tip fields in ductile materials with martensitic phase transformation - A numerical 2D study

被引：2

作者：

Burgold, Andreas ^{[1
]}

Kuna, Meinhard ^{[1
]}

Prueger, Stefan ^{[1
,2
]}

机构：

[1] Tech Univ Bergakad Freiberg, Inst Mech & Fluid Dynam, D-09596 Freiberg, Germany

[2] Tech Univ Dresden, Inst Mech & Shell Struct, D-01187 Dresden, Germany

来源：

ENGINEERING FRACTURE MECHANICS | 2015年 / 138卷

关键词：

TRIP-steel; Martensitic phase transformation; Strain-induced phase transformation; Transformation toughening; Crack tip blunting; Stress singularity; FRACTURE-TOUGHNESS; MATERIAL MODEL; TRIP-STEELS; BEHAVIOR; SIMULATION;

D O I：

10.1016/j.engfracmech.2015.03.002

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

TRIP-steels show attractive mechanical properties attributed to martensitic phase transformation. The present work studies the influence of phase transformation on mechanical fields at stationary, blunting cracks. Finite deformation analysis of crack opening is done numerically utilizing a recently developed material model. The hardening effect of martensite formation causes increased stresses and triaxiality and a second maximum in opening stress ahead of the tip. Implications for fracture processes are discussed and beneficial effects of strain-induced phase transformation are concluded. A delayed crack propagation mechanism in the fracture process zone and shielding according to phase transformation around the process zone are implied. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：169 / 184

页数：16

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