CSAI analysis of non-crimp fabric cross-ply laminate manufactured through wet compression molding process

The main purpose of the present work is to demonstrate mechanical performance of a wet-compression-molding (WCM) composite product through conventional compressive-strength-after-impact (CSAI) analysis. Biaxial non-crimp fabric (NCF) is utilized to manufacture laminated composite panels. Specimens are cut from the panels and tested to characterize fundamental mechanical properties of the NCF composite. The volume fractions of fibers and voids are also measured to evaluate the quality of the WCM product. Impact tests are carried out to examine impact resistance of the composite structure. Numerous impact characteristics at various energy levels are quantitatively measured. Internal failure patterns and damage extent are revealed via X-ray CT. Compression tests on the impacted plates are followed to evaluate structural integrity and damage tolerance (SIDT). 3D DIC technique is employed and distinct buckling responses dependent on impact energy levels are successfully visualized. Experimental results are showing a promising potential of the WCM process as one of the alternatives to the conventional autoclave-based fabrication method

RATE DEPENDENT TENSILE RESPONSE OF A PLAIN WEAVE TEXTILE COMPOSITE

The rate dependent behavior of the polymer and the textile composite has been experimentally studied. From experiment, it is concluded that the rate dependent behavior of the composite material is mainly determined by the matrix material

BVID analysis of non-crimp fabric cross-ply laminate manufactured through wet compression molding process

The main purpose of the present work is to demonstrate the feasibility of the wet compression molding process for aerospace applications through the conventional BVID analysis. Non-crimp fabrics are utilized to manufacture laminated composite panels with a cross-ply stacking sequence. Specimens are cut from the panels and tested to characterize various mechanical properties of the material. The volume fractions of fibers and voids are also measured to evaluate the quality of the WCM product. Impact tests per ASTM/D7131 are carried out to identify the BVID energy level for the composite structure. Failure patterns and damage extent at various energy levels are investigated. Experimental results are showing a promising potential of the WCM process as one of the alternatives to the conventional autoclave-based fabrication method