# Introduction

A brief description of the example.

*CONSTRAINED_LINEAR Linearly Constrained Plate LS-DYNA Manual Section: *CONSTRAINED_LINEAR Additional Sections: BOUNDARY_PRESCRIBED_MOTION_NODE DEFINE_CURVE Example: Linearly Constrained Plate Filename: constrained.linear.plate.k Description: The center node of a plate moves in the normal direction. Two other nodes that are neighbors to the center node are constrained such that their displacement in the normal direction is identical. Model: The plate is made of an elastic material measuring 40 * 4 0* 2 mm3 and contains 64 Hughes-Liu shell elements. The center node displacement increases linearly. At the termination time, 0.0005 seconds, the displacement is 15 mm. The degree of freedom in the z-direction for the two nodes is identical. Input: A load curve defines the ma gnitude of the prescribed displacement of the center node (*BOUNDARY_PRESCRIBED_MOTION_NODE, *DE FINE_CURVE). A linear constraint card defines the coupling of the displacement in the z -direction between the two nodes (*CONSTRA INED_LINEAR). Two equal coefficients with opposite signs control the displacement. Reference: Schweizerhof, K. and Weimar, K.