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Geometric nonlinear and progressive failure analysis of thick laminated box sections under end shortening, using finite strip method.

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Title: Geometric nonlinear and progressive failure analysis of thick laminated box sections under end shortening, using finite strip method.
Authors: Kurkaani Barvaj, A.1 (AUTHOR), Ovesy, H. R.1 (AUTHOR) ovesy@aut.ac.ir, Ghannadpour, S. A. M.2 (AUTHOR)
Source: Acta Mechanica. Apr2026, Vol. 237 Issue 4, p1903-1919. 17p.
Subjects: Finite strip method, Failure analysis, Composite plates, Composite construction, Structural analysis (Engineering), Deterioration of materials, Shear (Mechanics)
Abstract: In this article, the post-local-buckling behavior and ultimate strength of symmetric and unsymmetric cross-ply composite plate structures with a box cross section under uniform end shortening have been investigated using the finite strip method (FSM). The first-order shear deformation theory in conjunction with the minimum potential energy principle was employed. The boundary conditions at the loading edges are simply supported. Hashin and Rotem's failure criterion has been implemented for failure analysis, and once the failure occurs, the properties are assumed to degrade instantaneously. Two different models have been considered to apply material properties degradation, i.e., the complete ply degradation model (CPDM) and the strip degradation model (SDM). In the first model, the properties of the entire ply are degraded instantaneously after the failure, and in the SDM, the degradation of material properties occurs only in the strip where the failure has taken place. Convergence analysis has been performed for the number of finite strips as well as the number of terms in the displacement field in the FSM. The finite element method (FEM) is used to verify the results. The effects of the flange-to-web width ratio as well as the thickness ratio on the ultimate strength and the post-local-buckling behavior of the structures have been investigated. It is noticed that the first ply failure (FPF) load as well as the last ply failure (LPF) load of structures with symmetrical layup are higher than the corresponding loads for the unsymmetrical layup. [ABSTRACT FROM AUTHOR]
Copyright of Acta Mechanica is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 192725714
AccessLevel: 6
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PubTypeId: academicJournal
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  Data: Geometric nonlinear and progressive failure analysis of thick laminated box sections under end shortening, using finite strip method.
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  Data: <searchLink fieldCode="DE" term="%22Finite+strip+method%22">Finite strip method</searchLink><br /><searchLink fieldCode="DE" term="%22Failure+analysis%22">Failure analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Composite+plates%22">Composite plates</searchLink><br /><searchLink fieldCode="DE" term="%22Composite+construction%22">Composite construction</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+analysis+%28Engineering%29%22">Structural analysis (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Deterioration+of+materials%22">Deterioration of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Shear+%28Mechanics%29%22">Shear (Mechanics)</searchLink>
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  Data: In this article, the post-local-buckling behavior and ultimate strength of symmetric and unsymmetric cross-ply composite plate structures with a box cross section under uniform end shortening have been investigated using the finite strip method (FSM). The first-order shear deformation theory in conjunction with the minimum potential energy principle was employed. The boundary conditions at the loading edges are simply supported. Hashin and Rotem's failure criterion has been implemented for failure analysis, and once the failure occurs, the properties are assumed to degrade instantaneously. Two different models have been considered to apply material properties degradation, i.e., the complete ply degradation model (CPDM) and the strip degradation model (SDM). In the first model, the properties of the entire ply are degraded instantaneously after the failure, and in the SDM, the degradation of material properties occurs only in the strip where the failure has taken place. Convergence analysis has been performed for the number of finite strips as well as the number of terms in the displacement field in the FSM. The finite element method (FEM) is used to verify the results. The effects of the flange-to-web width ratio as well as the thickness ratio on the ultimate strength and the post-local-buckling behavior of the structures have been investigated. It is noticed that the first ply failure (FPF) load as well as the last ply failure (LPF) load of structures with symmetrical layup are higher than the corresponding loads for the unsymmetrical layup. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Acta Mechanica is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s00707-025-04582-5
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        Text: English
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        Type: general
      – SubjectFull: Failure analysis
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      – SubjectFull: Composite plates
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      – SubjectFull: Composite construction
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      – SubjectFull: Structural analysis (Engineering)
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      – SubjectFull: Deterioration of materials
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      – SubjectFull: Shear (Mechanics)
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      – TitleFull: Geometric nonlinear and progressive failure analysis of thick laminated box sections under end shortening, using finite strip method.
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              Text: Apr2026
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