Specialty Materials, Inc.
BORON COMPRESSION STRENGTH TEST
An experimental approach is described to optimize the stacking sequence of 0º and 90º plies in compression test specimens such that the compression strength of a unidirectional 50 volume percent boron epoxy composite can be determined. The compression strength test method is ASTM D6641 Standard Test Method for Determining the Compressive Properties of Polymer Matrix Composite Laminates Using a Combined Loading Compression (CLC). All the laminates consisted of 0º and 90º unidirectional plies with different ratios of 0º to 90º plies and varying stacking sequences. The percentage of 0º plies was varied from 50% to 10%. Equations in MIL-HDBK-17 were used to derive the 0º compression strength from the test results. The strength values obtained from this approach are among the highest and most consistent ever recorded for a unidirectional boron epoxy composite. This approach may also be used to determine the ideal stacking sequence for the compression strength test of other composite materials, such as unidirectional carbon epoxy composite materials.
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Determination Of Cross-Ply Laminate Stacking Sequence For The Compression Strength Testing Of A Unidirectional Boron Epoxy Material