Formability evaluation using modified cockcroft criterion with strain paths for sheet metal forming

Rong-Shean Lee, Ta Wei Chien

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In most situations, the original Cockcroft criterion underestimates material formability in the first quadrant of the forming limit diagram. So far, some modified Cockcroft criteria have been reported for different applications. This presentation focuses on the modified Cockcroft criterion, which takes the strain-path effect into consideration and demonstrates the accuracy of this criterion through the limiting dome height test, the free bulge test, and the biaxial tensile test using a cruciform specimen, respectively. The results showed the modified Cockcroft criterion with the strain path effect to have good agreement with the experimental results.

Original languageEnglish
Title of host publicationAdvances in Engineering Plasticity XII
PublisherTrans Tech Publications Ltd
Pages495-501
Number of pages7
ISBN (Print)9783038352266
DOIs
Publication statusPublished - 2015 Jan 1
Event12th Asia-Pacific Conference on Engineering Plasticity and Its Application, AEPA 2014 - Kaohsiung, Taiwan
Duration: 2014 Sep 12014 Sep 5

Publication series

NameKey Engineering Materials
Volume626
ISSN (Print)1013-9826

Other

Other12th Asia-Pacific Conference on Engineering Plasticity and Its Application, AEPA 2014
CountryTaiwan
CityKaohsiung
Period14-09-0114-09-05

Fingerprint

Metal forming
Formability
Sheet metal
Domes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Lee, R-S., & Chien, T. W. (2015). Formability evaluation using modified cockcroft criterion with strain paths for sheet metal forming. In Advances in Engineering Plasticity XII (pp. 495-501). (Key Engineering Materials; Vol. 626). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.626.495
Lee, Rong-Shean ; Chien, Ta Wei. / Formability evaluation using modified cockcroft criterion with strain paths for sheet metal forming. Advances in Engineering Plasticity XII. Trans Tech Publications Ltd, 2015. pp. 495-501 (Key Engineering Materials).
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Lee, R-S & Chien, TW 2015, Formability evaluation using modified cockcroft criterion with strain paths for sheet metal forming. in Advances in Engineering Plasticity XII. Key Engineering Materials, vol. 626, Trans Tech Publications Ltd, pp. 495-501, 12th Asia-Pacific Conference on Engineering Plasticity and Its Application, AEPA 2014, Kaohsiung, Taiwan, 14-09-01. https://doi.org/10.4028/www.scientific.net/KEM.626.495

Formability evaluation using modified cockcroft criterion with strain paths for sheet metal forming. / Lee, Rong-Shean; Chien, Ta Wei.

Advances in Engineering Plasticity XII. Trans Tech Publications Ltd, 2015. p. 495-501 (Key Engineering Materials; Vol. 626).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - In most situations, the original Cockcroft criterion underestimates material formability in the first quadrant of the forming limit diagram. So far, some modified Cockcroft criteria have been reported for different applications. This presentation focuses on the modified Cockcroft criterion, which takes the strain-path effect into consideration and demonstrates the accuracy of this criterion through the limiting dome height test, the free bulge test, and the biaxial tensile test using a cruciform specimen, respectively. The results showed the modified Cockcroft criterion with the strain path effect to have good agreement with the experimental results.

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Lee R-S, Chien TW. Formability evaluation using modified cockcroft criterion with strain paths for sheet metal forming. In Advances in Engineering Plasticity XII. Trans Tech Publications Ltd. 2015. p. 495-501. (Key Engineering Materials). https://doi.org/10.4028/www.scientific.net/KEM.626.495