Impact Force Hystory Patterns on Sandwiches Versus Post- impact Behaviour

Abstract eng:
The paper presents results obtained during low velocity impact tests made on sandwich materials aimed to be used for the manufacturing of various structural parts of a small integrated renewable energy unit. The shape of the recorded impact force history curves have been first analysed in each case, in order to get prime information about the possible damage produced in the material. The impact tests have been followed by mechanical tests, which offered quantitative information about the residual strength of the material, as valuable data concerning the damage tolerance of the materials. The whole scenario has to be put in place especially for new or improved materials which are intended to be used, creating a strong background for designers and very useful in exploitation, for achieving high in-service structural reliability. The research effort is underway, with results promising good mechanical performance of the proposed materials.

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