FATIGUE BEHAVIOR SIMULATION OF UNIDIRECTIONAL CARBON/ EPOXY COMPOSITES

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SHOKRIEH M.M.; TAHERI BEHROUZ F.A.

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Journal: Year:2007 | Volume:41 | Issue:4 (106) Page(s): 451-457

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Title

FATIGUE BEHAVIOR SIMULATION OF UNIDIRECTIONAL CARBON/ EPOXY COMPOSITES

Author(s)

SHOKRIEH M.M. | TAHERI BEHROUZ F.A. | Issue Writer Certificate

Keywords

POLYMER COMPOSITESQ3

FATIGUE MODELINGQ3

ENERGY METHODQ3

UNIDIRECTIONALQ3

Abstract

A new unified fatigue life model based on the ENERGY METHOD is developed for UNIDIRECTIONAL polymer composite laminates subjected to constant amplitude, tension tension or compression-compression fatigue loading. The model is based on static failure criterion presented by Sandhu and substantially is normalized to static strength in fiber, matrix and shear directions. So that all stress components are responsible for fatigue failure. The proposed model is capable for predicting fatigue life of UNIDIRECTIONAL composite laminates over the range of positive stress ratios in various fiber orientation angles. By using this new model all data points obtained from various stress ratios and fiber orientation angles are merged into a single master curve. Inputs for the proposed model are ultimate strengths in material directions under tension and compression monotonic loadings and one set of fatigue test data to prescribe the material constants.In order to verify the new fatigue model, the model is applied to the available experimental data to show its capability for predicting the fatigue lives. Two different sets of experimental data available in the literature for different materials, carbon/epoxy and E-glass/ epoxy, of agreement UNIDIRECTIONAL plies are selected and examined. The best with the experimental data is obtained by using least square method. Obtained results by the new fatigue model are in good agreements with the experimental data and confirm that the model becomes a unified strength based model to eliminate the effects of positive stress ratios as well as the fiber orientation on the off-axis fatigue behavior of UNIDIRECTIONAL composite materials subjected to constant amplitude cyclic loading.

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APA: Copy

SHOKRIEH, M.M., & TAHERI BEHROUZ, F.A.. (2007). FATIGUE BEHAVIOR SIMULATION OF UNIDIRECTIONAL CARBON/ EPOXY COMPOSITES. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), 41(4 (106)), 451-457. SID. https://sid.ir/paper/14091/en

Vancouver: Copy

SHOKRIEH M.M., TAHERI BEHROUZ F.A.. FATIGUE BEHAVIOR SIMULATION OF UNIDIRECTIONAL CARBON/ EPOXY COMPOSITES. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN)[Internet]. 2007;41(4 (106)):451-457. Available from: https://sid.ir/paper/14091/en

IEEE: Copy

M.M. SHOKRIEH, and F.A. TAHERI BEHROUZ, “FATIGUE BEHAVIOR SIMULATION OF UNIDIRECTIONAL CARBON/ EPOXY COMPOSITES,” JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), vol. 41, no. 4 (106), pp. 451–457, 2007, [Online]. Available: https://sid.ir/paper/14091/en

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