Abstract
In this study, flexural behaviors of the pultruded composite laminate were evaluated through experiments and theoretical analysis. Three-point flexural tests were performed for pultruded specimens. The typical failure mode for the longitudinal flexural specimens was local crush on the top surface accompanied with local cracks on the bottom surface at midspan. For the transverse tests, the specimens presented a failure pattern with local cracks initiated and propagated at both the top and bottom sides at the midspan. Theoretical analysis, based on micromechanics and macromechanics, was performed to predict flexural deformation and stress distribution of the pultruded laminate beam. Based on the continuum damage model proposed by the authors, this paper mainly investigates the flexural behavior and failure pattern of pultruded lamination. The theoretical and finite element results agreed well with the test results. The results can provide a reference for the design of the structural pultruded modular systems.
Highlights
With high strength, lightweight, good durability behavior and continuous producing features, pultruded fiber reinforced polymer (PFRP) composites are becoming the preferred materials in both the new structures and in the repair and rehabilitation of the existing structures [1, 2]
Pultruded glass fiber reinforced polymer (GFRP) composites have been applied in pedestrian bridges as well as in the bridge deck replacement primarily due to their economic benefits [3,4,5,6,7,8,9,10,11,12,13,14,15,16]
Careful attention should be paid to the mechanical properties of the GFRP laminates when designing the GFRP structures since GFRP laminates are orthotropic, and the shear modulus is independent of the elastic modulus and Poisson’s ratio
Summary
Lightweight, good durability behavior and continuous producing features, pultruded fiber reinforced polymer (PFRP) composites are becoming the preferred materials in both the new structures and in the repair and rehabilitation of the existing structures [1, 2]. Pultruded GFRP laminates with different stacking-sequence show different mechanical behaviors. Considering no specification provides mechanical properties for the GFRP laminates, we conducted this study aiming to obtain a deeper understanding of the flexural behavior of the GFRP laminates. Eoretical analysis are performed for predicting deformation and stress distribution of the pultruded laminate specimens based on both micromechanics and macromechanics. Eoretical analysis was performed to predict flexural deformation and stress distribution of the pultruded laminate beam. Advances in Materials Science and Engineering proposed by the authors, this paper investigates the flexural behavior and failure pattern of pultruded lamination. Advances in Materials Science and Engineering proposed by the authors, this paper investigates the flexural behavior and failure pattern of pultruded lamination. e study in this paper can be a reference for the design of structural pultruded modular systems
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