Forming Limit Curves Prediction of Low-Carbon Steel Sheets Using Ductile Fracture Criteria

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Mamusi H.; BAKHSHI M.; GORJI H.; HASHEMI R.

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Journal: Modares Mechanical Engineering Year:2021 | Volume:21 | Issue:4 Page(s): 247-261

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Information Journal Paper

Title

Forming Limit Curves Prediction of Low-Carbon Steel Sheets Using Ductile Fracture Criteria

Author(s)

Mamusi H. | BAKHSHI M. | GORJI H. | HASHEMI R. | Issue Writer Certificate

Keywords

Sheet Metal FormabilityQ1

Forming Limit Diagrams (FLDs)Q1

Ductile Fracture CriteriaQ1

Necking CriteriaQ1

Abstract

Forming Limit Diagrams (FLDs) are very useful measures for safe forming of sheet metals without failure due to necking or fracture under different loading conditions. This paper uses Ductile Fracture Criteria to predict the formability of low carbon steel sheets to evaluate their accuracy in predicting the FLDs. In addition, the fracture forming limit curves (FFLD) and necking forming limit curves (NFLD) for St12 low-carbon steel have been extracted experimentally and numerically. In the experimental procedure, the Nakazima stretching test was used. In the numerical procedure, by defining six phenomenological Ductile Fracture Criteria in ABAQUS / Explicit finite element software, the failure is predicted and compared with the experimental results. These criteria were calibrated using 6 tests namely as In-plane shear, uniaxial tensile test, circle hole test, notched tension test, plane strain test, and Nakazima stretching test. The results showed that the criteria, which include both the stress triaxiality (η ) and Lode parameter (L), provide a more accurate prediction of failure. Also to predict necking during numerical simulation of Nakazima test and also to extract the NFLD, three criteria of the second derivative of major strain, the second derivative of thickness strain and the second derivative of equivalent plastic strain have been used.

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APA: Copy

Mamusi, H., BAKHSHI, M., GORJI, H., & HASHEMI, R.. (2021). Forming Limit Curves Prediction of Low-Carbon Steel Sheets Using Ductile Fracture Criteria. MODARES MECHANICAL ENGINEERING, 21(4 ), 247-261. SID. https://sid.ir/paper/369699/en

Vancouver: Copy

Mamusi H., BAKHSHI M., GORJI H., HASHEMI R.. Forming Limit Curves Prediction of Low-Carbon Steel Sheets Using Ductile Fracture Criteria. MODARES MECHANICAL ENGINEERING[Internet]. 2021;21(4 ):247-261. Available from: https://sid.ir/paper/369699/en

IEEE: Copy

H. Mamusi, M. BAKHSHI, H. GORJI, and R. HASHEMI, “Forming Limit Curves Prediction of Low-Carbon Steel Sheets Using Ductile Fracture Criteria,” MODARES MECHANICAL ENGINEERING, vol. 21, no. 4 , pp. 247–261, 2021, [Online]. Available: https://sid.ir/paper/369699/en

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