Studies on the off-axis high strain rate compression loading of satin weave carbon/epoxy composites

This paper discusses the experimental study on the response of affordable satin weave carbon/epoxy composite laminates subjected to high strain rate compression loading using a modified compression split Hopkinson’s pressure bar (SHPB) under off-axis loading. Thirty seven layer laminates were manufactured using aerospace grade woven fabrics with SC-15 epoxy resin system utilizing vacuum assisted resin infusion molding approach. Samples were subjected to high strain rate compression loading at strain rates ranging from 1092/s to 2425/s using a modified SHPB that facilitates controlled single pulse loading of the sample. Samples were tested in the inplane direction along warp (0°) and weft/fill (90°) and 15°, 30°, 45°, 60° and 75° off-axes angles. Quasi-static tests were carried out to compare with the dynamic response. Failure modes were evaluated using optical micrographs. Results of the study were analyzed in terms of peak stress, strain at peak stress, failure modes and orientation.