An enhanced Johnson-Cook strength model for splitting strain rate and temperature effects on lower yield stress and plastic flow
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- 作者：Luca Gambirasio luca.gambirasio@unibg.it" class="auth_mail" title="E-mail the corresponding author ; Egidio Rizzi ; egidio.rizzi@unibg.it" class="auth_mail" title="E-mail the corresponding author
- 关键词：Modified Johnson&ndash ; Cook model ; Split Johnson&ndash ; Cook material parameters ; Calibration procedures ; Strain rate and temperature sensitivities ; Plastic behavior of metals
- 刊名：Computational Materials Science
- 出版年：2016
- 出版时间：15 February 2016
- 年：2016
- 卷：113
- 期：Complete
- 页码：231-265
- 全文大小：1987 K
文摘
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A new “strength model”, named Split Johnson–Cook (SJC), is proposed and discussed.
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Strain rate and temperature effects on lower yield stress and plastic flow are split.
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Three calibration procedures of the SJC model are developed and discussed.
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Calibrations are applied to three materials and results are compared to those from plain JC.
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Results prove the much improved capability of SJC to capture real material behavior.