On the correlation between fracture toughness and crash resistance of advanced high strength steels

被引：52

作者：

Frometa, D. ^{[1
]}

Lara, A. ^{[1
]}

Molas, S. ^{[1
]}

Casehas, D. ^{[1
,3
]}

Rehrl, J. ^{[2
]}

Suppan, C. ^{[2
]}

Larour, P. ^{[2
]}

Calvo, J. ^{[4
]}

机构：

[1] Fundacio CTM Ctr Tecnol, Pl Ciencia 2, Manresa 08243, Spain

[2] Voestalpine Stahl GmbH, Voestalpine Str 3, A-4020 Linz, Austria

[3] Lulea Univ Technol, S-97187 Lulea, Sweden

[4] Univ Politecn Cataluna, Eduard Maristany 16, Barcelona 08019, Spain

来源：

ENGINEERING FRACTURE MECHANICS | 2019年 / 205卷

关键词：

Fracture toughness; Crash resistance; Axial impact tests; Advanced high strength steels; Essential work of fracture; STRESS DUCTILE FRACTURE; ESSENTIAL WORK; CRACKING RESISTANCE; MECHANICS; STRAIN;

D O I：

10.1016/j.engfracmech.2018.10.005

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Automotive industry players have devoted large efforts to identify the material parameters governing the crash resistance of Advanced High Strength Steels (AHSS). Such knowledge is essential to improve impact performance prediction and optimize new steel development Nevertheless, there is still an open discussion about which are the most relevant properties on AHSS crashworthiness. In this work, the authors investigate the correlation between the fracture toughness of different AHSS and their crash failure behaviour. Fracture toughness is measured in the frame of fracture mechanics, through the essential work of fracture methodology. Two fracture resistance parameters are characterized: the fracture toughness at cracking initiation, w(e)(i), and the essential work of fracture, w(e). Toughness values are compared with the results of axial impact tests, which are evaluated according to the energy absorbed and the cracking behaviour observed in crash boxes. Results show that fracture toughness permits to describe different crash events in terms of crack initiation and crack propagation and allows ranking AHSS impact resistance; steels with higher w(e) present better crash performance. Therefore, fracture toughness is proposed as a key material property to predict the crash resistance of AHSS and as a relevant design parameter for crash resistant parts.

引用

页码：319 / 332

页数：14

共 41 条

[1]

[Anonymous], 2010, 238100 VDA

[2]

Casellas D, 2014, P 2 INT C HIGH MN ST

[3]

Casellas D, 2015, P 5 INT C HOT SHEET

[4] Fracture Toughness to Understand Stretch-Flangeability and Edge Cracking Resistance in AHSS [J].

Casellas, Daniel ;

Lara, Antoni ;

Frometa, David ;

Gutierrez, David ;

Molas, Silvia ;

Perez, Lluis ;

Rehrl, Johannes ;

Suppan, Clemens .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2017, 48A (01) :86-94

[5] Characterization of the high temperature tearing resistance using the essential work of fracture -: Application to dual phase ferritic stainless steels [J].

Chehab, B. ;

Brechet, Y. ;

Glez, J. -C. ;

Jacques, P. J. ;

Mithieux, J. -D. ;

Veron, M. ;

Pardoen, T. .

SCRIPTA MATERIALIA, 2006, 55 (11) :999-1002

[6]

Clutton E., 2001, FRACTURE MECH TESTIN, P177

[7]

COTTERELL B, 1977, INT J FRACTURE, V13, P267

[8] Measuring toughness and the cohesive stress-displacement relationship by the essential work of fracture concept [J].

Cotterell, B ;

Pardoen, T ;

Atkins, AG .

ENGINEERING FRACTURE MECHANICS, 2005, 72 (06) :827-848

[9]

Dietsch P, 2017, 6 INT C HOT SHEET ME

[10] Assessing edge cracking resistance in AHSS automotive parts by the Essential Work of Fracture methodology [J].

Frometa, D. ;

Tedesco, M. ;

Calvo, J. ;

Lara, A. ;

Molas, S. ;

Casellas, D. .

36TH IDDRG CONFERENCE - MATERIALS MODELLING AND TESTING FOR SHEET METAL FORMING, 2017, 896

← 1 2 3 4 5 →