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显性动力分析中定义摩擦参数.doc

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    • 显性动力分析中定义摩擦参数EDCGEN, Option, Cont, Targ, FS, FD, DC, VC, VDC, VI, V2, V3, V4, BTIME, DTIME, BOXTD1,BOXID2Specifies contact parameters for an explicit dynamics analysis.OptionLabel identifying the contact behavior (dictates the meaning of V I through V4).AG 一 Automatic general contact.ANTS — Automatic nodes-to-surface contact.ASSC 一 Automatic single surface contact.ASS2D 一 Automatic 2-D single surface contact (applicable only with the Cont and FS arguments).ASTS — Automatic surface-to-surface contact.DRAWBEAD — Drawbead contactENTS 一 Eroding nodes-to-surface contact.ESS — Eroding single surface contact.ESTS 一 Eroding surfacc-to-surfacc contact.FNTS 一 Forming nodes-to-surface contact.FOSS — Forming one way surface-to-surface contact.FSTS — Forming surface-to-surface contact.NTS 一 Nodes-to-surface contact.OSTS 一 One way surface-to-surface contact.RNTR — Rigid nodes to rigid body contact.ROTR — Rigid body to rigid body (one way) contact.SE 一 Single edge contact.SS 一 Single surface contact.STS — Surface-to-surface contact.TDNS — Tied nodes-to-surface contact.TSES — Tied shell edge-to-surface contact.TDSS 一 Tied surface-to-surface contact.TNTS 一 Tiebreak nodes-to-surface contactTSTS —— Tiebreak surface-to-surface contact.ContContact surface identified by a component name [CM] , a part ID number [EDPART], or an assembly ID number [EDASMP]. If a component name is in put, the component must contain nodes that represent the contact surface (assemblies are not valid for a component name)・ Alternatively, a part number may be input that identifies a group of elements as the contact surface, or an assembly number may be input containing a maximum of 16 parts. The assembly ID number must be greater than the highest number used for the part ID. Cont is not required for automatic general contact, single edge contact, and single surface contact options (Option = AG SE, ASSC, ESS, and SS). If Option = ASS2D, only part assemblies are valid.TargTarget surface identified by a component name [CM] 、 a part ID number [EDPART], or an assembly ID number [EDASMP]. If a comp on ent name is in put, the component must contain nodes that represent the target surface (assemblies are not valid for a component name)・ Alternatively, a part number may be input that identifies a group of elements as the target surface, or an assembly number may be input containing a maximum of 16 parts・ The assembly ID number must be greater than the highest number used for the part ID. Targ is not defined for automatic general contact, single edge contact, automatic single surface contact, eroding single surface contact, single surface contact, and automatic 2-D single surface contact options (Option = AG SE, ASSC, ESS, SS, and ASS2D).FSStatic friction coefficient (defaults to 0).FDDynamic friction coefficient (defaults to 0).DCExponential decay coefficient (defaults to 0).VCCoefficient for viscous friction (defaults to 0).VDCViscous damping coefficient in percent of critical damping (defaults to 0).VI, V2, V3, V4Additi onal in put for drawbead, eroding, rigid, and tiebreak con tact. The meanings of VI-V4 will vary, depending on Option. See the table below for V1-V4 definitions.Additional input for drawbead contact (Option = DRAWBEAD):VI 一 Load curve ID giving the bending component of the restraining force per unit draw bead length as a function of draw bead displacement. V1 must be specified.V2 一 Load curve ID giving the normal force per unit draw bead length as a function of draw bead displacement. V2 is optional.V3 — Draw bead depth^V4 — Number of equally spaced integration points along the draw bead (default = 0, in which case ANSYS LS・DYNA calculates this value based on the size of the elements that interact with the draw bead).Additional input for eroding contact (Option = ENTS, ESS, or ESTS):VI 一 Symmetry plane option. The purpose of this option is to retain the correct boundary conditions in a model with symmetry・0 — Off (default).1 — Do not include faces with normal boundary constraints (e.g., segments of brick elements on a symmetry plane).V2 —— Erosion/interior node option.0 一 Erosion occurs only at exterior boundaries.1 一 Interior eroding contact can occur (default)・V3 一 Adjacent material treatment for solid elements.0 — Solid element faces are included only for free boundaries (default).1 — Solid element faces are included if they are on the boundary of the material subset. This option also allows erosion within a body and the consequent treatment of contact.Additional input for rigid contact (Option = RNTR or ROTR):VI 一 Data curve id for force versus deflection behavior [EDCURVE]. Also specify V2. (No default.)V2 — Force calculation method for rigid contact. (No default.)1 — Data curve gives total normal force on surface versus maximum penetration of any node (only applicable for Option = ROTR).2 一 Data curve gives norma。

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