Compressive Strength Presentation

Compressive Strength Presentation - Compressive strength of...

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Compressive strength of unidirectional composites: evaluation and comparison f prediction models N.K. Naik, Rajesh S. Kumar of prediction models Eduardo Rondon EAS 6939
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troduction Introduction Study of composites is a relatively new branch of Engineering Micromechanics dates back to the 1960s with research such as that which led to Rosen’s compressive strength predictions 1965 in 1965 Although much is well-understood, much research continues on modeling compressive strength gp g Many factors govern compressive failure (e.g. layup, loading) Because of this, empirical models are often developed around experimental data sets
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troduction Introduction Although many models are present, few have been compared Since predictions are so empirical, they depend highly on their test results. The goal of this study was to compare all models to a common data set eally one would find predictive method that is both Ideally, one would find a predictive method that is both accurate and simple
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troduction Introduction Often in composites, failure is determined by compressive stresses (compressive strength is lower than tensile strength) Compression also comes hand in hand with buckling (global local) or local) Failure under compressive loading is defined as failure of the material without the specimen buckling or any other global pg y g defect triggering the mechanism
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The Three Compressive Failure Modes Microbuckling is the buckling of fibers within the matrix. Can happen out of phase (extensional microbuckling) or in phase (shear microbuckling)
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The Three Compressive Failure Modes Kinking is highly localized fiber buckling. It is only occurs after microbuckling has already developed after the
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This note was uploaded on 03/27/2012 for the course EAS 4240c taught by Professor Staff during the Spring '11 term at University of Florida.

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Compressive Strength Presentation - Compressive strength of...

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