Inertial Effects in Twin Skinned GRP Laminates Subjected to Impact Loading in a Three Point Bend Configuration
Results are given for impact tests for a mass of 4.3 kg dropped from a height of up to 3m onto a GRP sandwich beam in a three point bend configuration. Force versus deflection traces are derived from accelerometer data and the effect of span and impact velocity discussed. A two degree of freedom inertial model is developed for the 180 mm span test to give the local deformation of specimen in the vicinity of the impactor and hence the effect of local stresses on failure. High speed photographic data is used to supplement experimental results.
KeywordsContact Stiffness Sandwich Panel Accelerometer Data Drop Height Span Test
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