Analysis of geometric effects on stress wave propagation in epoxy resins of plate-like structure by dynamic photoelasticity combined with strain gauge

作者：Hayasi Ryoei^*; Masuda Yoshiharu; Hashimoto Shozo; Kuriyama Shinhou

来源：Japanese Journal of Applied Physics, 2008, 47(6): 4676-4681.

DOI：10.1143/JJAP.47.4676

• stress wave
• epoxy resin
• plate-like structure
• dynamic photoelasticity
• propagation speed
• attenuation coefficient
• geometric effects

Experimental studies have been conducted using the dynamic photoelastic technique combined with a strain gauge to investigate geometric effects on stress wave propagation in axially impacted epoxy resins of plate-like structure. Dynamic photoelasticity provides a means of visualizing the stress wave field inside a solid. A device that triggers the generation of stress waves by direct projectile impact is used to conduct high-speed photoelasticity and strain gauge measurements. This triggering is achieved by an electrical connection between projectile and sample. The geometric effects of the width-to-wavelength ratio on the propagation speed and attenuation coefficient of stress waves were analyzed for isotropic rectangular rods of different width-to-thickness ratios, the thickness being the same in each case. The experimental results for stress wave speed as a function of width-to-wavelength ratio are in reasonable agreement with theoretical predictions based on a modified Love's equation involving the geometric effects due to lateral inertia.

• 出版日期2008-6