Based on paper, the variational principle and generalized variational principle of elastic dynamics for elastic body with nonlinear stress-strain relations are
In this paper we deal with the second-order effect of an elastic circular shaft duringtorsion.The analysis is based on the method of co-moving coordinates and t
On the ground of wharf and a station where coal is piled up,the sources polluting theatmosphere are mainly the raised coal dust.According to the principle of me