Low temperature effect on single and repeated impact behavior of woven glass-epoxy composite plates

Abstract

This study deals with the determination of the response of woven glass-epoxy composites to the single and repeated impact loading at room temperature and at −50℃. Single impacts were performed at various energies up to perforation took place and the characteristics such as contact force, contact duration, deflection, and absorbed energy were obtained. In addition, some low energy values were selected for the repeated impact tests. The maximum contact force and absorbed energy versus repeat numbers were given. It was found that temperature is extremely important for determining the response of the composite subjected to single and repeated impact loadings.

Damage accumulation in braided textiles-reinforced composites under repeated impacts: Experimental and numerical studies

“…, the absorbed energy decreased initially, then remaining nearly constant [15]. At the initial few impacts, the absorbed energy fraction decreased due to the compaction process with the specimen becoming tougher, less energy was able to dissipate at the ensuing impacts [16].…”

“…The impactor contacted with a relatively softer matrix at the first few impacts and with the stiffer fibre-reinforced phase subsequently. The compaction process provides a stiffer surface with higher local fibre concentration for subsequent impacts, resulting in a higher peak load [15]. After the compaction, the peak force maintained a plateau for the impact energy of 2 and 3 J, indicating that at least 20 impacts were insufficient for fibre breakage and perforation.…”

Durability and failure mechanics of woven carbon composites under repeated impact loading in Arctic conditions

“…4a, which is the very first impact on a laminate where the impact energy is insufficient to cause damage for decreasing the stiffness of the laminate. Icten (2015) attributes this to the contact of the impactor with a relatively compliant matrix material. The second phase is known as "force increase", given by letter B in Fig.…”

“…Icten (2015) studied the influence of temperature on single and repeated impact of woven glassepoxy composites at room temperature and −50 • C. They observed that the laminates impacted at −50 • C recorded higher peak forces and absorbed less energy than the samples impacted at room temperature. Ibekwe et al (2007) investigated the impact response of glass fiber-reinforced unidirectional and cross-ply laminated composite beams at 20, 10, 0, −10 and −20 • C, and observed that more damage was induced in the specimens impacted at lower temperature than those at higher temperatures.…”

Dynamic response of composite laminated beams under asynchronous/repeated low-velocity impacts of multiple masses

“…The effect of different parameters such as thickness of the woven glass-epoxy composite plates and low-temperature on the repeated impact until perforation have been illustrated separately [39,40]. In the first research, an equation relating the perforation impact energy threshold and number of impacts to this state was reported for each thickness.…”