Effect of Shot Peening and Solidification on Fatigue Properties of Epoxy Base Composite Material

Abstract

This work evaluated experimentally the fatigue stress behavior of two types of composite material (SIR-epoxy resin with woven E-glass fiber as reinforcement and SIR-epoxy resin with random E-glass fiber as reinforcement) subjected to shot peening (2, 4 and 6 min) through three different times of solidification of samples (two, four and six days). The results show that, for woven reinforced composite, the great improvement in fatigue stress was obtained at both two and six days of solidification with (2, 4 and 6) min of shot peening times (SPTs) in which the percentage of the maximum enhancement was 59.38% in fatigue stress (at two days of solidification and 6 min shot peening time). For random reinforced composite the great improvement of fatigue stress was obtained at two and six days of solidification with (2, 4 and 6) min of shot peening times (SPTs) in which the percentage of the maximum enhancement was 33.78% (at two days solidification and 6 min shot peening). After four days of solidification, increasing shot peening time will decrease the fatigue stress for both types of composite materials (woven reinforcement and random reinforcement) and the maximum decreases in fatigue stresses at 6 min of shot peening was -43.06% and -28.9% for woven composite and random composite respectively. The tensile test and the fatigue test were done after full solidification of all the patterns.

Experimental Investigation to Optimize the Manufacturing Parameters of Ankle–Foot Orthoses Using Composite and Titanium Nanoparticles

“…The results of the fatigue tests for the optimum materials (0.75% titanium nanoparticles and 10 layers of Perlon) were also considered in the analysis. These results were compared with the previous study presented in [45]; a case of lamination materials (10 layers of Perlon) was used in this comparison.…”

Adapting Shot Peening for Surface Texturing Using Customized Additive Manufactured Shots

“…A study on the effect of SP applied to epoxy resin composite reinforced by electrical glass fibers revealed that the tensile and fatigue strength of the substrates was improved by around 30–60% at certain SP coverages. [ 6 ] SP was applied as an interlayer process for additive manufacturing (AM) of acrylonitrile butadiene styrene (ABS) using fused filament fabrication (FFF). [ 7 ] The results showed that the hybrid fabrication approach was effective in enhancing the dynamic properties tested by Charpy impact and drop weight tests.…”