Effect investigation of relative humidity and temperature on multi-layer corrugated sandwich structures

The mechanical properties of multi-layer corrugated sandwich structure are investigated in this paper. The mathematical model in which the structure factors and temperature and relative humidity are concerned is developed through the cooperation of theories and experiments. Then the model is normalized by the elastic modulus of the medium under controlled condition, thus this model can be used to predict the effect of various temperature and relative humidities on the plateau stress of multi-layer corrugated sandwich structure under flatwise compression. Comparisons of the predictions and experiments are made in order to examine the accuracy of the model, and a good correlation is obtained in view of the experimental error. The proposed model can be applied to the practical material selection and optimal design of corrugated sandwiches. Meanwhile, the proposed model might provide valuable information for the investigation of different materials with corrugated sandwich structure.