A Finite Element Model for Calculating the Stresses in Bars with Microstructure Loaded by Ultra-Short Laser Pulses

摘要: A finite element solution for the thermal stress field, generated in elastic bars with micro-structure is presented this paper. The heat transfer phenomenon governed by non-Fourier law of Maxwell–Vernotte–Cattanneo. Heat losses due to free convection are supposed occur along bar. taken into account model adopting first strain gradient model. As a approximation, effects micro-inertia ignored. Furthermore, and mechanical fields assumed uncoupled, so that energy equation independent any rates. problem, we consider micro-bar, mechanically fixed thermally insulated at both ends, stimulated an ultra-short laser pulse. For spatial discretization equation, use quadratic C 0-continuous Lagrange elements, while corresponding elasticity equations, Hermite 1-continuous elements employed. semi-discrete system equations integrated time...