Modified Constitutive Model and Ductile Fracture Criterion for 5A06 Al-Alloy Sheets at Elevated Temperatures

LIU Kangning; LANG Lihui; XU Qiuyu

doi:10.3969/j.issn.0258-2724.2018.01.026

Volume 31 Issue 1

Jan. 2018

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Journal of Southwest Jiaotong University > 2018 > 53(1): 214-218.

LIU Kangning, LANG Lihui, XU Qiuyu. Modified Constitutive Model and Ductile Fracture Criterion for 5A06 Al-Alloy Sheets at Elevated Temperatures[J]. Journal of Southwest Jiaotong University, 2018, 53(1): 214-218. doi: 10.3969/j.issn.0258-2724.2018.01.026

Citation:

LIU Kangning, LANG Lihui, XU Qiuyu. Modified Constitutive Model and Ductile Fracture Criterion for 5A06 Al-Alloy Sheets at Elevated Temperatures[J]. Journal of Southwest Jiaotong University, 2018, 53(1): 214-218. doi: 10.3969/j.issn.0258-2724.2018.01.026

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Modified Constitutive Model and Ductile Fracture Criterion for 5A06 Al-Alloy Sheets at Elevated Temperatures

doi: 10.3969/j.issn.0258-2724.2018.01.026

Received Date: 18 Jan 2016
Publish Date: 25 Feb 2018

Abstract

Abstract

In order to obtain the formation characteristics of 5A06 aluminium alloy sheets, uniaxial tensile tests were conducted under different conditions. From hot tensile and fracture tests, a modified Misiolek equation was defined that extrapolated the flow stress from the diffuse necking of the metal sheet. By using a radial basis unction (RBF) artificial neural network, a Crockroft-Latham ductile fracture threshold prediction model was also developed. An evaluation of the network compared model results with experimental data. Results show that the material flow stress is very sensitive to temperature and strain rate, and the RBF artificial neural network can predict the ductile fracture threshold with a maximum error of less than 10.6%.
- aluminium alloy,
- constitutive model,
- elevated temperature,
- ductile fracture criterion,
- RBF artificial neural network

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References(20)

References

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Modified Constitutive Model and Ductile Fracture Criterion for 5A06 Al-Alloy Sheets at Elevated Temperatures

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Modified Constitutive Model and Ductile Fracture Criterion for 5A06 Al-Alloy Sheets at Elevated Temperatures

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