Compression-after impact behavior of laminated composite plates subjected to low velocity impact in high temperatures

Experimental analysis of CFRP laminates subjected to compression after impact: The role of impact-induced cracks in failure

“…Indeed, among the experimental studies, some focus on the influence of material properties on the evolution of the residual strength: fibre [8,11], resin [11][12][13], interface [14], stacking [15], transverse reinforcement like stitching [16,17] or Z-pinning [18], fabric instead of unidirectional tape [12,19], curing temperature [19]. There are also some experimental studies concerning the influence of test conditions such as: temperature during impact [20], hygrothermal conditions [12,[21][22][23], fatigue loading [24], or use of protective layer [25]. However, the vast majority of these studies does not focus on a detailed understanding of damage mechanisms leading to the final rupture in CAI, but only on the level of residual strength.…”

Charpy Impact Value of Sandwich Structural (CFRP/ABS/CFRP) Composites Constructed with Carbon Fiber Reinforced Epoxy Polymer (CFRP) and Acrylonitrile Butadiene Styrene (ABS) Sheets Separately Irradiated by Electron Beam Prior to Lamination

“…Compression after impact (CAI) testing is often conducted after point impact in aerospace materials such as quasiisotropic CFRP for safety design. 23,24) Five fracture modes in composite laminates and sandwich panels undergoing point impact have been identified: core crushing, core cracking, delamination in the impacted face sheet, matrix cracking, and fiber breakage in the face sheets. 25) This method of point impact fracture followed by CAI for aircraft CFRP has been generally studied to evaluate safety against impact accidents such as bird strike, volcanic rock or hailstone on aircraft CFRP.…”

Charpy Impact of Sandwich Structural Composites (CFRP/PC/CFRP) of Polycarbonate (PC) Cores Covered with Carbon Fiber Cross Textile Reinforced Epoxy Polymer (CFRP) Thin Sheets as a Function of Temperature

“…However, there is extensive research on point impact 311) and point impact followed by CAI, 8,9) to evaluate strength of damaged aerospace materials. Point impact followed by CAI is very different than Charpy impact.…”

“…Compression after impact (CAI) testing is often conducted after point impact in aerospace materials such as quasiisotropic CFRP for safety design. 8,9) Five fracture modes in composite laminates and sandwich panels undergoing point impact have been identified: core crushing, core cracking, delamination in the impacted face sheet, matrix cracking, and fiber breakage in the face sheets. 10) This method of point impact fracture followed by CAI for aircraft CFRP has been generally studied to evaluate safety against impact accidents such as bird strike, volcanic rock or hailstone on aircraft CFRP.…”