Development of a failure strain surface in average stress triaxiality and average lode angle domains of a low temperature high strength steel

J. Choung; S. J. Park; G. T. Tayyar

doi:10.1201/b18179-88

Development of a failure strain surface in average stress triaxiality and average lode angle domains of a low temperature high strength steel

J. Choung, S. J. Park, G. T. Tayyar

Department of Naval Architecture and Marine Engineering

Inha University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The paper deals with formulation of failure strain according to average stress triaxiality and normalized lode angle of a low temperature high-tensile steel, EH36, used for arctic marine structures. Stress triaxiailty and lode angle are known the factors mainly governing fracture initiation of most ductile metals. A number of tests are conducted for round and flat tensile specimens with different notches from relatively smooth to very sharp levels, and specially designed specimens to induce pure shear failure and shear-tension failure. Nonlinear finite element simulation of each specimen is performed to obtain stress and strain fields at fracture initiation. Three dimensional failure strain surface is proposed in the average stress triaxiality and normalized lode angle domains. In order to verify validity of the surface, tensile tests are conducted for asymmetric notch specimens which are indirectly representing fracture-anticipating parts of real marine structures. It is concluded that the proposed fracture surface well predicts fracture initiation of the real structures.

Original language	English
Title of host publication	Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015
Editors	C. Guedes Soares, R. Ajit Shenoi
Publisher	CRC Press/Balkema
Pages	671-683
Number of pages	13
ISBN (Electronic)	9781138027893
DOIs	https://doi.org/10.1201/b18179-88
Publication status	Published - 2015
Event	5th International Conference on Marine Structures, MARSTRUCT 2015 - Southampton, United Kingdom Duration: 25 Mar 2015 → 27 Mar 2015

Publication series

Name	Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015

Conference

Conference	5th International Conference on Marine Structures, MARSTRUCT 2015
Country/Territory	United Kingdom
City	Southampton
Period	25/03/15 → 27/03/15

Bibliographical note

Publisher Copyright:
© 2015 Taylor & Francis Group, London.

Access to Document

10.1201/b18179-88

Cite this

Choung, J., Park, S. J., & Tayyar, G. T. (2015). Development of a failure strain surface in average stress triaxiality and average lode angle domains of a low temperature high strength steel. In C. G. Soares, & R. A. Shenoi (Eds.), Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015 (pp. 671-683). (Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015). CRC Press/Balkema. https://doi.org/10.1201/b18179-88

Choung, J. ; Park, S. J. ; Tayyar, G. T. / Development of a failure strain surface in average stress triaxiality and average lode angle domains of a low temperature high strength steel. Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015. editor / C. Guedes Soares ; R. Ajit Shenoi. CRC Press/Balkema, 2015. pp. 671-683 (Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015).

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title = "Development of a failure strain surface in average stress triaxiality and average lode angle domains of a low temperature high strength steel",

abstract = "The paper deals with formulation of failure strain according to average stress triaxiality and normalized lode angle of a low temperature high-tensile steel, EH36, used for arctic marine structures. Stress triaxiailty and lode angle are known the factors mainly governing fracture initiation of most ductile metals. A number of tests are conducted for round and flat tensile specimens with different notches from relatively smooth to very sharp levels, and specially designed specimens to induce pure shear failure and shear-tension failure. Nonlinear finite element simulation of each specimen is performed to obtain stress and strain fields at fracture initiation. Three dimensional failure strain surface is proposed in the average stress triaxiality and normalized lode angle domains. In order to verify validity of the surface, tensile tests are conducted for asymmetric notch specimens which are indirectly representing fracture-anticipating parts of real marine structures. It is concluded that the proposed fracture surface well predicts fracture initiation of the real structures.",

author = "J. Choung and Park, {S. J.} and Tayyar, {G. T.}",

note = "Publisher Copyright: {\textcopyright} 2015 Taylor & Francis Group, London.; 5th International Conference on Marine Structures, MARSTRUCT 2015 ; Conference date: 25-03-2015 Through 27-03-2015",

year = "2015",

doi = "10.1201/b18179-88",

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series = "Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015",

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Choung, J, Park, SJ & Tayyar, GT 2015, Development of a failure strain surface in average stress triaxiality and average lode angle domains of a low temperature high strength steel. in CG Soares & RA Shenoi (eds), Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015. Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015, CRC Press/Balkema, pp. 671-683, 5th International Conference on Marine Structures, MARSTRUCT 2015, Southampton, United Kingdom, 25/03/15. https://doi.org/10.1201/b18179-88

Development of a failure strain surface in average stress triaxiality and average lode angle domains of a low temperature high strength steel. / Choung, J.; Park, S. J.; Tayyar, G. T.
Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015. ed. / C. Guedes Soares; R. Ajit Shenoi. CRC Press/Balkema, 2015. p. 671-683 (Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - The paper deals with formulation of failure strain according to average stress triaxiality and normalized lode angle of a low temperature high-tensile steel, EH36, used for arctic marine structures. Stress triaxiailty and lode angle are known the factors mainly governing fracture initiation of most ductile metals. A number of tests are conducted for round and flat tensile specimens with different notches from relatively smooth to very sharp levels, and specially designed specimens to induce pure shear failure and shear-tension failure. Nonlinear finite element simulation of each specimen is performed to obtain stress and strain fields at fracture initiation. Three dimensional failure strain surface is proposed in the average stress triaxiality and normalized lode angle domains. In order to verify validity of the surface, tensile tests are conducted for asymmetric notch specimens which are indirectly representing fracture-anticipating parts of real marine structures. It is concluded that the proposed fracture surface well predicts fracture initiation of the real structures.

AB - The paper deals with formulation of failure strain according to average stress triaxiality and normalized lode angle of a low temperature high-tensile steel, EH36, used for arctic marine structures. Stress triaxiailty and lode angle are known the factors mainly governing fracture initiation of most ductile metals. A number of tests are conducted for round and flat tensile specimens with different notches from relatively smooth to very sharp levels, and specially designed specimens to induce pure shear failure and shear-tension failure. Nonlinear finite element simulation of each specimen is performed to obtain stress and strain fields at fracture initiation. Three dimensional failure strain surface is proposed in the average stress triaxiality and normalized lode angle domains. In order to verify validity of the surface, tensile tests are conducted for asymmetric notch specimens which are indirectly representing fracture-anticipating parts of real marine structures. It is concluded that the proposed fracture surface well predicts fracture initiation of the real structures.

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Choung J, Park SJ, Tayyar GT. Development of a failure strain surface in average stress triaxiality and average lode angle domains of a low temperature high strength steel. In Soares CG, Shenoi RA, editors, Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015. CRC Press/Balkema. 2015. p. 671-683. (Analysis and Design of Marine Structures - Proceedings of the 5th International Conference on Marine Structures, MARSTRUCT 2015). doi: 10.1201/b18179-88

Development of a failure strain surface in average stress triaxiality and average lode angle domains of a low temperature high strength steel

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