Abstract
This paper deals with a new bending test method for advanced composites. Although the conventional three and four-point bending tests are convenient to obtain bending modulus and strength, composites may fail at the loading nose due to the stress concentration, because composite materials have high anisotropy and they fail in a brittle manner.
To compensate for the above shortcoming, we developed a new bending test method which is based on a buckling of a column. Both strength and modulus could be measured. In the present paper, another refined methodology to evaluate the bending modulus is discussed in addition to the bending strength. 1300 and T800 carbon/epoxy unidirectional and quasi-isotropic laminates with various specimen lengths were tested. The superiority of the present method was demonstrated especially for evaluating the strength.
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