Experimental Measurement and Analysis of Stress/Shock Wave Propagation Speed through Pre-strained Silicone Foam Pads under Lateral Confinement

摘要: Foam materials are extensively utilized in aerospace, military, and transportation applications to mitigate blast or shock impact. When foam subjected an external high-speed impact, shock, loading, elastic wave will form propagate through the thickness of materials. In this study, silicone pads, which were confined laterally pre-strained different levels, experimentally characterized theoretically analyzed understand their effects on propagation characteristics under impact loading. Depending velocity, either strain a would be generated pad with pre-strains. Above certain whereas, below threshold generated. This velocity depends pre-strain applied pad. Equations provided estimate speed for from amount pads velocity. These equations expected help improve design assembly processes mitigation applications.