ansys 指令EDMP

ansys 指令EDMP EDMP, Lab, MAT, VAL1, VAL2, VAL3, VAL4, VAL5, VAL6 — Defines material properties for an explicit dynamics analysis. PREP7:Explicit Dynamics DY ED Lab Valid material property label. Applicable labels are listed under "Material Properties" in the input table for each explicit dynamics element type in the ANSYS Elements Reference. HGLS -- Hourglass and bulk viscosity properties (valid for PLANE162, SHELL163 and SOLID164 using reduced integration). VAL1 through VAL6 e also used. For those elements using full integration, HGLS is ar not applicable and the input has no effect. RIGID -- Rigid body constraint (valid for LINK160, BEAM161, PLANE162, SHELL163, and SOLID164). VAL1 and VAL2 are also used. CABLE -- Cable properties (valid for LINK167). VAL1 is optional input (see Notes). ORTHO -- Defines a material coordinate system for the orthotropic material model (valid for PLANE162, SHELL163 and SOLID164) or the anisotropic material model (valid for PLANE162 and SOLID164). VAL1 is also used. FLUID -- Fluid properties (valid for PLANE162 and SOLID164). VAL1 is optional input (see Notes). MAT Material reference number (defaults to the current MAT setting on MAT command). VAL1, VAL2, VAL3, VAL4, VAL5, VAL6 Additional input for specified Lab material property. The meaning of VAL1 through VAL6 will vary, depending on Lab. See the table below for VAL1 through VAL6 definitions. VAL1-VAL6 Definitions Additional input for hourglass and bulk viscosity properties (Lab = HGLS). VAL1 -- Hourglass control type. For solid elements (PLANE162 and SOLID164), 5 options are available. For quadrilateral shell and membrane elements (SHELL163) with reduced integration, the hourglass control is based on the formulation of Belytschko and Tsay; i.e., options 1-3 are identical and options 4-5 are identical. 0, 1 -- Standard LS-DYNA viscous form (default). 2 -- Flanagan-Belytschko viscous form. 3 -- Flanagan-Belytschko viscous form with exact volume integration for solid elements. 4 -- Flanagan-Belytschko stiffness form. 5 -- Flanagan-Belytschko stiffness form with exact volume integration for solid elements. VAL2 -- Hourglass coefficient. (Defaults to 0.1.) Values greater than 0.15 may cause instabilities. The recommended default applies to all options. The stiffness forms can stiffen the response (especially if deformations are large) and, therefore, should be used with care. is For the shell and membrane elements, the value input for VAL1 the membrane hourglass coefficient. and can also be input, VAL5VAL6 but generally VAL2 = VAL5 = VAL6 is adequate. VAL3 -- Quadratic bulk viscosity coefficient. (Defaults to 1.5.) VAL4 -- Linear bulk viscosity coefficient. (Defaults to 0.06.) VAL5 -- Hourglass coefficient for shell bending. (Defaults to VAL2.) VAL6 -- Hourglass coefficient for shell warping. (Defaults to VAL2.) Additional input for rigid body constraint (Lab = RIGID). VAL1 -- Translational constraint parameter (relative to global Cartesian coordinates). 0 -- No constraints (default). 1 -- Constrained X displacement. 2 -- Constrained Y displacement. 3 -- Constrained Z displacement. 4 -- Constrained X and Y displacements. 5 -- Constrained Y and Z displacements. 6 -- Constrained Z and X displacements. 7 -- Constrained X, Y, and Z displacements. VAL2 -- Rotational constraint parameter (relative to global Cartesian coordinates). 0 -- No constraints (default). 1 -- Constrained X rotation. 2 -- Constrained Y rotation. 3 -- Constrained Z rotation. 4 -- Constrained X and Y rotations. 5 -- Constrained Y and Z rotations. 6 -- Constrained Z and X rotations. 7 -- Constrained X, Y, and Z rotations. Additional input for cable properties (Lab = CABLE). VAL1 -- Load curve ID defining engineering stress versus engineering strain (i.e., change in length over the initial length). If and Young's VAL1 modulus [MP,EX] are input, the load curve corresponding to will VAL1 be used and Young's modulus will be ignored. Additional input for material coordinate system (Lab = ORTHO). VAL1 -- Coordinate system ID number from the EDLCS command. This coordinate system will be used to orient the orthotropic or anisotropic materials associated with the material number, MAT. Additional input for fluid material properties (Lab = FLUID). VAL1 -- Bulk modulus of fluid. If VAL1 is not input, the bulk modulus will be calculated from the elastic modulus (EX) and Poisson's ratio (NUXY). Notes For Lab = RIGID, you must specify elastic modulus (EX), density (DENS), and Poisson's ratio (NUXY) [MP command]. For Lab = CABLE, you must specify density (DENS) and one of the following: Young's modulus (EX) or an engineering stress-strain curve (VAL1). For Lab = FLUID, you must specify either the bulk modulus (VAL1) or both Young's modulus (EX) and Poisson's ratio (NUXY) (if all three are specified, only will be used). VAL1 After you define a rigid body using EDMP,RIGID, you may assign inertia(惯 性) properties to that rigid body using the EDIPART command. EDMP,ORTHO is required for orthotropic or anisotropic material properties that are not aligned with the global Cartesian coordinate system. Via the GUI, Lab = RIGID, CABLE, ORTHO, and FLUID are available through the material model interface. See Defining Explicit Dynamics Material Models in the ANSYS/LS-DYNA User's Guide for more information. Use the MPLIST and MPDELE commands to list and delete materials defined by the EDMP command. This command is also valid in SOLUTION. Menu Paths See EDMP Menu Paths in the ANSYS Command Menu Path Listings. Prev Up Next EDLOAD Home EDNB