Delaminated Woven Fabric Composite Plates under Transverse Quasi-Static Loading: Experimental Studies

Abstract

Laminated composite plates are very sensitive to transverse loading because of weak interfaces between layers. During transverse loading, delamination can initiate and propagate at the interfaces. Also, in-plane failure of layers can initiate and grow further because of the in-plane stresses. Such damages can cause severe structural disintegration leading to a reduction in stiffness and strength. The delamination may be caused by manufacturing defects also. Such delamination can grow during service condition. Experimental studies have been carried out on the damage evolution in a typical plain weave fabric composite plate under transverse quasi-static loading. Studies have been carried out on composite plates with central artificial delamination of 5 mm, 10 mm and 15 mm diameter sizes, and also on undelaminated composite plates. Load-displacement behavior, damage evolution and damage sizes and damage shapes have been studied.

Quasi-static indentation damage and residual compressive failure analysis of carbon fiber composites using acoustic emission and micro-computed tomography

“…As shown in Figure 14(b), there is barely indentation damage of fiber bundles and resin matrix for Specimen F-10. As the indentation load increases up to 20 kN, fiber bundle damage, fiber debonding and fiber breakage can be observed 35 as in Figure 14(c) and (d). From Figure 14(e), it is revealed that the serious internal damage leads to the collapse of composite specimen.…”

Damage evolution in delaminated woven fabric E-glass/epoxy composite plates under transverse static patch loading

“…The experimental results for specimen SP2 are presented in Figure 3 and Table 11 (Naik and Reddy, 2002). Damage dimensions under transverse central quasi-static patch loading are presented in Table 11.…”

“…Composite plates of dimensions 150 Â 150 Â 5 mm 3 made of a typical plain weave E-glass/epoxy laminate GLE-12 were used for the experimental studies under transverse central quasi-static patch loading (Naik and Reddy, 2002). Central artificial delamination of 5 mm diameter at a distance of 1 mm from the top surface was introduced.…”

“…Typical experimental studies are presented for WF composites in Naik and Raju (2001) and Naik and Reddy (2002). The behavior of WF composites under transverse loading is not well studied.…”

“…Damage evolution in woven fabric (WF) composites without delamination under transversestatic loading is presented in Naik et al (2003b). Typical experimental studies are presented for WF composites in Naik and Raju (2001) and Naik and Reddy (2002). The behavior of WF composites under transverse loading is not well studied.…”