Dynamic Behavior of a Laminated Beam Under the Effect of a Moving Heat Source

Abstract

Dynamic thermoelastic behavior of a laminated beam is investigated. The beam is heated by a heating source moving longitudinally. A new dynamic model for a laminated beam is obtained by which the induced displacements and stresses can be computed based on the thermal history and geometry of the beam. The thermal history of the beam, the induced displacements, and the thermal stresses are determined using an analytical–numerical technique based on the Laplace transformation and the Riemann sum approximation. Different symmetric lamination layups are considered. The numerical computations show that the temperature gradients, and hence the induced displacements, and thermal stresses, are affected mainly by the heat source speed, beam inertia, layer combinations, and differences in the thermal and mechanical properties between the materials of the layers.