✦ LIBER ✦

The application of a ductile fracture criterion to the prediction of the forming limit of sheet metals

✍ Scribed by Hongsheng Liu; Yuying Yang; Zhongqi Yu; Zhenzhong Sun; Yongzhi Wang

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 665 KB
Volume: 209
Category: Article
ISSN: 0924-0136
DOI: 10.1016/j.jmatprotec.2009.04.020

No coin nor oath required. For personal study only.

✦ Synopsis

To predict accurately the forming limit in sheet metal forming, the combination of FE simulation with tension tests is adopted in this paper to determine the material constants p and C in a ductile fracture criterion (DFC), which is advanced by the author. Forming limits of bore-expanding, hemispherical punch bulging and deep drawing (cylindrical, square-cup parts) are predicted by means of the DFC. Comparison of the results predicted by the DFC with experimental values shows that the precision of forming limit predicted by material constants obtained by the combination method is more accurate than that predicted by material constants obtained by the tension method, and that the critical punch stoke and the fracture initiation position in forming processes above mentioned are predicted accurately by the DFC.

📜 SIMILAR VOLUMES

Prediction of sheet forming limits using

Prediction of sheet forming limits using a new continuum damage mechanics criterion for ductile fracture

✍ Tie-Jun Wang 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 251 KB

Al~tract--Sheet forming is a localization procedure of deformation and damage. In this paper, we firstly give a complete set of constitutive equations for elastic-plasticity coupled with damage. Then, a new continuum damage mechanics based local criterion for ductile fracture, proposed by the author

On the prediction of the forming-limit d

On the prediction of the forming-limit diagram of sheet metals

✍ P.P. Date; K.A. Padmanabhan 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 736 KB

Criterion and mode of the forming limit

Criterion and mode of the forming limit in sheet forming

✍ Hitoshi Moritoki 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 755 KB

In this paper, the forming limit of sheet metals is examined, with respect to the collapse of the unique solution. In general, there are two cases bringing about multiplicity: one is statically-admissible multiplicity and the other is kinematically-admissible multiplicity. The multiplicities are con

Application of Hill's new yield theory t

Application of Hill's new yield theory to sheet metal forming—Part I. Hill's 1979 criterion and its application to predicting sheet forming limit

✍ Jianshe Lian; Dajun Zhou; Bernard Baudelet 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 537 KB

Instability limits to the forming of she

Instability limits to the forming of sheet metals

✍ D.W.A. Rees 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 721 KB

In this paper forming limit diagrams are constructed employing predictions from local and diffuse plastic instability. Comparisons are made with test results from: (i) hydrostatic bulging through circular and elliptical dies; and (ii) uniaxial in-plane tension. The sheet materials investigated inclu

A criterion of ductile fracture on the t

A criterion of ductile fracture on the tensile testing of a perforated mild steel sheet

✍ Michihiko Nagumo 📂 Article 📅 1973 🏛 Elsevier Science ⚖ 938 KB