Abstract
The aim of this study was to investigate impact resistance of 3D woven composites, impacted by three different impactor shapes. An experimental study was carried out to compare the impact resistance on four types of 3D woven fiberglass composites. Impact resistance test will be performed using standard method ASTM D2444, with a set up initial impact energy is 20 J, velocity of 3.4901 m/s, height of 0.6163m and mass applied is 3.29 kg. Three different impactor shapes which are hemispherical, conical and ogival were used for testing woven fabric composite impact test. Hand lay-up technique was used to fabricate the composites. From results, 4 float Layer-to-layer Interlock (4L) gave the highest impact resistance for all impactor shapes with 6258.0 N for hemispherical impactor, 4000.1 N for conical impactor and 3750.7 N for ogival impactor. Ogival impactor tends to penetrate the woven composite samples better compared to conical and hemispherical impactors.Â
Highlights
Composite materials are made from combinations of two or more different substances with own characteristics, which combined produced a superior material used for various applications [1]
During formation of 3D woven fabric, the z-yarn solidify the fabric by interconnecting the warp yarns and weft yarns through the thickness of the fabric [5]. 3D fabrics have developed rapidly to composite manufacturers as it offer better delamination resistance [6, 7]. 3D woven fabric can be produced by 3D and 2D weaving ma chines
Angle interlock and orthogonal weave are examples of 3D woven fabric. 3D angle interlock fabric is good for ballistic resistance
Summary
Composite materials are made from combinations of two or more different substances with own characteristics, which combined produced a superior material used for various applications [1]. Vaidya et al [9] studied that 3D angle interlock composite have higher impact resistance due to able to absorb high capacity of energy by the z-direction fibers. Orthogonal weave is another example 3D woven fabric. Orthogonal weave comprises of three sets of yarns that are warp, weft and stuffer yarns All these yarns will be bind together by using binder yarn to enhance the structural integrity [10]. The study concluded that 3D orthogonal woven composite has a good impact resistance as no delamination occurs because of the existence of z-yarns in thickness direction. This study was carried out for low-velocity impact loading
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