Determination of damage criterion using a hybrid analysis for advanced high strength steel
Conference proceedings article
ผู้เขียน/บรรณาธิการ
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รายละเอียดสำหรับงานพิมพ์
รายชื่อผู้แต่ง: Panich S., Uthaisangsuk V., Suranuntchai S., Jirathearanat S.
ผู้เผยแพร่: Trans Tech Publications
ปีที่เผยแพร่ (ค.ศ.): 2014
Volume number: 849
หน้าแรก: 200
หน้าสุดท้าย: 206
จำนวนหน้า: 7
ISBN: 9783037859254
นอก: 1022-6680
eISSN: 1662-8985
ภาษา: English-Great Britain (EN-GB)
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บทคัดย่อ
Advanced High Strength (AHS) steels have been increasingly applied in the automotive industries due to their distinguished mechanical properties. Microstructures of these steels play an important role and are designed by constituent phases with distinct characteristics. AHS steels exhibit sophisticated damage mechanisms that complicate the prediction of material formability. In this work, Ductile Crack Initiation Locus (DCIL) was developed for describing failure behavior of dual phase steel sheet. A hybrid experimental and numerical analysis was used to determine the DCIL. Tensile tests of various sample geometries were experimentally carried out and crack initiation occurred during forming was identified by the Direct Current Potential Drop (DCPD) method. Then, FE simulations of the corresponding tests were performed to evaluate local stress triaxialities and equivalent plastic strains of the critical area. The damage curves for both crack initiation and localized necking were obtained. Additionally, the von Mises, Hill'48 and Yld2000-2d yield criterion were defined in the calculations in order to examine effect of yield model on the resulted curves. To verify applicability of the damage curves, Nakazima test of uniaxial sample was taken into account. ฉ (2014) Trans Tech Publications, Switzerland.
คำสำคัญ
Crack initiation, Ductile damage, FEM simulation
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