PREDICTION OF FORMING LIMIT CURVES FOR KINEMATICALLY HARDENED VOIDED SHEET METALS
Nader Nabil Mohamed El-Laithy;
Abstract
Forming limit curves (FLC) play a major role in sheet metal forming processes. They identifY the limit strains for biaxially stretched sheets. Several attempts have been made in order to predict FLC theoretically. Still a totally satisfactory agreement with the experimental results has not yet been totally achieved.
The objective of this work is to establish a kinematic-hardening model to predict forming limit curves for voided sheet metals. The model is based on combining three basic yield criteria of the theory of plasticity, namely: von-Mises criterion for a void-free matrix material, Gurson-Tvergaard criterion for voided solids and kinematic-hardening rule due to Prager-Ziegler. A unified complete description of plasticity constitutive laws are derived, e.g. yield function, :flow rule and void growth laws.
The objective of this work is to establish a kinematic-hardening model to predict forming limit curves for voided sheet metals. The model is based on combining three basic yield criteria of the theory of plasticity, namely: von-Mises criterion for a void-free matrix material, Gurson-Tvergaard criterion for voided solids and kinematic-hardening rule due to Prager-Ziegler. A unified complete description of plasticity constitutive laws are derived, e.g. yield function, :flow rule and void growth laws.
Other data
| Title | PREDICTION OF FORMING LIMIT CURVES FOR KINEMATICALLY HARDENED VOIDED SHEET METALS | Other Titles | التنبؤ بمنحنيات الانفعال الحدى للالواح المعدنية ذات الفجوات والمتصلدة كينماتيكيا | Authors | Nader Nabil Mohamed El-Laithy | Issue Date | 2001 |
Attached Files
| File | Size | Format | |
|---|---|---|---|
| نادر نبيل.pdf | 334.27 kB | Adobe PDF | View/Open |
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