Comparing Tsai-Wu and Tsai-Hill failure criteria for high-pressure vessel design under uncertainty

• Autor(a) principal: Novais, Henrique Cordeiro [UNESP]
• Data de Publicação: 2023
• Outros Autores: Silva, Samuel da [UNESP], Alves, Mariana Pimenta [UNESP], Cimini Junior, Carlos Alberto [UNESP]
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: https://hdl.handle.net/11449/253351
• topic: Composite materials; Failure criteria; High-pressure vessels; Uncertainty analysis; Sobol indices

This study compares two widely used failure theories for characterizing composite materials: the Tsai-Wu and Tsai-Hill failure criteria. The paper’s main objective is to evaluate the performance of both criteria in a high-pressure vessel design project, taking into account uncertainties in material properties at the lamina level and in the internal pressure applied to the vessel. The analysis of histograms of failure index fluctuations reveals that, contrary to a purely deterministic approach, each failure criterion can be more or less conservative when there is variability in the system due to different factors. Additionally, a global sensitivity analysis using Sobol indices was conducted to determine the contributions of individual inputs to the output uncertainty. This probabilistic approach emphasizes the importance of considering uncertainty analysis to design structures that are both safer and more cost-effective.