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Open AccessArticle

Influence of Plastic Anisotropy on the Limit Load of an Overmatched Cracked Tension Specimen

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Division of Computational Mathematics and Engineering, Institute for Computational Science, Ton Duc Thang University, 19 Nguyen Huu Tho St, Tan Phong Ward, Dist 7, Ho Chi Minh City 700000, Vietnam
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Faculty of Civil Engineering, Ton Duc Thang University, 19 Nguyen Huu Tho St, Tan Phong Ward, Dist 7, Ho Chi Minh City 700000, Vietnam
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Moscow Aviation Institute (National Research University), Volokolamskoe Shosse 4, 125993 Moscow, Russia
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Institute of Mechanics, VAST, 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
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Faculty of Mechanics and Automation, Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Hanoi 100000, Vietnam
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Author to whom correspondence should be addressed.
Symmetry 2020, 12(7), 1079; https://doi.org/10.3390/sym12071079
Received: 15 April 2020 / Revised: 6 May 2020 / Accepted: 15 May 2020 / Published: 1 July 2020
Plastic anisotropy is a common property of many metallic materials. This property affects many aspects of structural analysis and design. In contrast to the isotropic case, there is a great variety of yield criteria proposed for anisotropic materials. Moreover, even if one specific yield criterion is selected, several constitutive parameters are involved in it. Therefore, parametric analysis of structures made of anisotropic materials is quite cumbersome. The present paper demonstrates the effect of the constitutive parameters involved in Hill’s quadratic yield criterion on the upper bound limit load for weld stretched overmatched tension specimens containing a crack of arbitrary shape, assuming that the crack is located inside the weld. Different sets of the constitutive parameters are involved in the yield criteria for weld and base materials. Since the limit load is an input parameter of many flaw assessment procedures, the final result of the present paper shows that it is necessary to take into account plastic anisotropy in these procedures. It is worthy of note that the limit load is involved in the flaw assessment procedures in combination with the stress and strain fields near the tip of a crack. In anisotropic materials, these fields may become non-symmetric even under symmetric loading. This behavior affects the propagation of cracks. View Full-Text
Keywords: flaw assessment procedures; limit load; plastic anisotropy; welded structures flaw assessment procedures; limit load; plastic anisotropy; welded structures
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MDPI and ACS Style

Lyamina, E.; Kalenova, N.; Nguyen, D.K. Influence of Plastic Anisotropy on the Limit Load of an Overmatched Cracked Tension Specimen. Symmetry 2020, 12, 1079.

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