The Formulation of the Quadratic Failure Criterion for Transversely Isotropic Materials: Mathematical and Logical Considerations

The quadratic function of the original Tsai–Wu failure criterion for transversely isotropic materials is re-examined in this paper. According to analytic geometry, two of the troublesome coefficients associated with the interactive terms—one between in-plane direct stresses and one between transvers...

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Main Authors: Shuguang Li, Mingming Xu, Elena Sitnikova
Format: Article
Language:English
Published: MDPI AG 2022-03-01
Series:Journal of Composites Science
Subjects:
Online Access:https://www.mdpi.com/2504-477X/6/3/82
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author Shuguang Li
Mingming Xu
Elena Sitnikova
author_facet Shuguang Li
Mingming Xu
Elena Sitnikova
author_sort Shuguang Li
collection DOAJ
description The quadratic function of the original Tsai–Wu failure criterion for transversely isotropic materials is re-examined in this paper. According to analytic geometry, two of the troublesome coefficients associated with the interactive terms—one between in-plane direct stresses and one between transverse direct stresses—can be determined based on mathematical and logical considerations. The analysis of the nature of the quadratic failure function in the context of analytic geometry enhances the consistency of the failure criterion based on it. It also reveals useful physical relationships as intrinsic properties of the quadratic failure function. Two clear statements can be drawn as the outcomes of the present investigation. Firstly, to maintain its basic consistency, a failure criterion based on a single quadratic failure function can only accommodate five independent strength properties, viz. the tensile and compressive strengths in the directions along fibres and transverse to fibres, and the in-plane shear strength. Secondly, amongst the three transverse strengths—tensile, compressive and shear—only two are independent.
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spelling doaj.art-85f5101c7baa488499388101a30fadc52023-11-24T01:52:38ZengMDPI AGJournal of Composites Science2504-477X2022-03-01638210.3390/jcs6030082The Formulation of the Quadratic Failure Criterion for Transversely Isotropic Materials: Mathematical and Logical ConsiderationsShuguang Li0Mingming Xu1Elena Sitnikova2Faculty of Engineering, University of Nottingham, Nottingham NG8 1BB, UKFaculty of Engineering, University of Nottingham, Nottingham NG8 1BB, UKFaculty of Engineering, University of Nottingham, Nottingham NG8 1BB, UKThe quadratic function of the original Tsai–Wu failure criterion for transversely isotropic materials is re-examined in this paper. According to analytic geometry, two of the troublesome coefficients associated with the interactive terms—one between in-plane direct stresses and one between transverse direct stresses—can be determined based on mathematical and logical considerations. The analysis of the nature of the quadratic failure function in the context of analytic geometry enhances the consistency of the failure criterion based on it. It also reveals useful physical relationships as intrinsic properties of the quadratic failure function. Two clear statements can be drawn as the outcomes of the present investigation. Firstly, to maintain its basic consistency, a failure criterion based on a single quadratic failure function can only accommodate five independent strength properties, viz. the tensile and compressive strengths in the directions along fibres and transverse to fibres, and the in-plane shear strength. Secondly, amongst the three transverse strengths—tensile, compressive and shear—only two are independent.https://www.mdpi.com/2504-477X/6/3/82quadratic failure functionTsai–Wu criterionfailure envelopestrengthtransverse shear strengthstransversely isotropic materials
spellingShingle Shuguang Li
Mingming Xu
Elena Sitnikova
The Formulation of the Quadratic Failure Criterion for Transversely Isotropic Materials: Mathematical and Logical Considerations
Journal of Composites Science
quadratic failure function
Tsai–Wu criterion
failure envelope
strength
transverse shear strengths
transversely isotropic materials
title The Formulation of the Quadratic Failure Criterion for Transversely Isotropic Materials: Mathematical and Logical Considerations
title_full The Formulation of the Quadratic Failure Criterion for Transversely Isotropic Materials: Mathematical and Logical Considerations
title_fullStr The Formulation of the Quadratic Failure Criterion for Transversely Isotropic Materials: Mathematical and Logical Considerations
title_full_unstemmed The Formulation of the Quadratic Failure Criterion for Transversely Isotropic Materials: Mathematical and Logical Considerations
title_short The Formulation of the Quadratic Failure Criterion for Transversely Isotropic Materials: Mathematical and Logical Considerations
title_sort formulation of the quadratic failure criterion for transversely isotropic materials mathematical and logical considerations
topic quadratic failure function
Tsai–Wu criterion
failure envelope
strength
transverse shear strengths
transversely isotropic materials
url https://www.mdpi.com/2504-477X/6/3/82
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