Abstract
The paper describes an investigation of the processing of sandwich structures by resin transfer moulding. One of the major difficulties in producing sandwich elements in this way is displacement and deformation of foam cores during impregnation. Under extreme circumstances this may result in thickness variations, variable properties and voidage in the skins. Core shifting was studied using an incompressible core within a glass fibre preform and the effects of process variables on core movement were isolated in a series of mouldings. The results demonstrate the significant effects of fluid pressure, fibre volume fraction and mould temperature on the quality of sandwich laminates.
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