A Nonlinear Analytical Model for Symmetric Laminated Beams in Three-point Bending

The application of modeling theories and the choice of failure criteria are difficult in part because they are too varied and must be validated by biaxial tests, which are expensive to be performed. This article is devoted to the nonlinear modeling and failure criteria which are employed in the design and analysis of anisotropic materials. Indeed, in this work, a study of the macroscopic and microscopic behavior of a graphite epoxy under a three-point bending test is conducted, and the successive failures are also predicted. Experimentally, the damage progression and the effect of geometrical parameters are followed and identified in detail. The analytical modeling is based on a recently developed approximation for isotropic materials. This approximation is also valid for the studied quasi-isotropic laminated composite. A software program has been elaborated for the application of the most general failure criteria. The results obtained by this analytical modeling show a good correlation with those of the experimental study.

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“…Using the same approach, we also model some preestablished experimental results in the literature (Figure 25). 12…”

Section: Resultsmentioning

confidence: 99%

“…It correctly describes the nonlinear center-deflection of three-point bending specimens using a simplified formalism of two equations. 12 These analytical methods are combined with various failure criteria, and the results are compared with the experimental results.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear modeling of the failure of a graphite epoxy under a three-point bending test

Benbouras

Bellahkim

Maziri

et al. 2019

Polymers and Polymer Composites

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“…Failure theory algorithm was developed by VBA/Excel application. The deflection causing the damage allows the calculation of the force applied using the nonlinear approach of Venetis [6].…”

Section: -4 Hashin Criterionmentioning

confidence: 99%

A review and application of the failure criteria on a graphite epoxy under three-point bending test

et al. 2019

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The application of failure criteria are difficult partly because they are too various and must be validated by biaxial tests, which are expensive to be achieved. In this work, an analytical modeling based on a software program has been elaborated for application of the most general failure criteria and prediction of successive failure. Finally, the results obtained by this analytical modeling show a good correlation with those carried out by experimental study.

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“…An increase in concrete strength leads to a significant increase in the fracture energy value (Siregar, 2017). When the deflection of the beam is less than 2.5 times the thickness, the experimental and analytical curves are about 1% using the average global stresses method (Benbouras et al, 2017). In 1909, (Talbot, 1909) declared that shear stress is a characteristic of the length, longitudinal reinforcement, and stiffness of a beam.…”

Section: Introductionmentioning

confidence: 99%

Modified Strut and Tie Method and Truss Reinforcement for Shear Strengthening of Reinforced Concrete Deep Beams

Harsha¹,

Poluraju²

2021

IJTech

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The aim of this study was to evaluate and test the limitations of the Indian Standard code 456-2000 related to deep beams, given that the code does not have any provisions regarding the use of the strut and tie method (STM)of design. This study validates the use of truss reinforcement and STM-shaped reinforcements as alternatives to STM design. We conclude that horizontal web reinforcement has a greater impact than vertical shear reinforcement. Deep beams with truss reinforcement and STM-based reinforcement were shown to have the highest shear strength capacity of all the deep beams. In the present study, 21 deep beams were cast and used to analyze their shear and flexural behavior. The specimens were divided into four groups based on length, width and depth, percentage of tension reinforcement, and percentage of horizontal and vertical shear reinforcement. The results revealed that truss-type reinforcement configuration is stronger than vertical shear reinforcement, as the former can resist 20% more load than the latter.

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A Nonlinear Analytical Model for Symmetric Laminated Beams in Three-point Bending

Cited by 9 publications

References 3 publications

Nonlinear modeling of the failure of a graphite epoxy under a three-point bending test

Nonlinear modeling of the failure of a graphite epoxy under a three-point bending test

A review and application of the failure criteria on a graphite epoxy under three-point bending test

Modified Strut and Tie Method and Truss Reinforcement for Shear Strengthening of Reinforced Concrete Deep Beams

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