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* SURFACE BEHAVIOR: To contact definitions pressure - interference and other relations to change the default hard contact pressure - interference relationship. * SURFACE INTERACTION option must be used in combination or in combination with standard analysis * GAP and * INTERFACE option. By default, standard contact constraints will decide whether or not to be applied Lagrange multipliers. * CONTACT CONTROLS option can be used to override the default values. Alternatively, mutually exclusive parameters: AUGMENTED LAGRANGE: only for standard analysis. Select the augmented Lagrangian method to apply contact constraints. PENALTY: only for hard contact pressure standard analysis - interference kitchen dresser relationship. Select the penalty function method to apply contact constraints. Optional parameters: NO SEPARATION: Once exposed to establish two contact surfaces are not separated PRESSURE-OVERCLOSURE: This parameter is used to select the contact pressure - interference relationship. PRESSURE-OVERCLOSURE = HARD (default) Select softened no physical pressure - interference relationship. Note that if you use the penalty function method or augmented Lagrangian method, on the value of some softening occurs. = EXPONENTIAL definition index pressure - interference relationship. = LINEAR define kitchen dresser a linear relationship between pressure interference. = SCALE FACTOR pressure to define piecewise linear scaling based on the default contact stiffness kitchen dresser - interference relations, this option is only for general contact. = TABULAR in tabular form is defined piecewise linear pressure - interference relationship. If no contact surface (for surface or ITT type contact unit based node, such a situation may occur), "pressure" should be interpreted as the force; three-dimensional beam or the contact lever, "pressure" should be interpreted as no force per unit length. When you want to change the default behavior of the surface, in the standard analysis, PRESSURE-OVERCLOSURE parameter can not be used with NO SEPARATION parameters. For Augmented Lagrangian method and penalty function method optional data lines: the first line, only one line, user-defined penalty stiffness. If empty, the default value or penalty stiffness factor multiplied by the ratio of the following three settings. 2, the contact pressure kitchen dresser is a gap of 0:00, the default is 03, the default penalty stiffness scaling factor or the above one in the penalty kitchen dresser stiffness, the default is 1.
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