DEFORM-3D Keyword Documentation Part 5 ppt

EMSVTY EMSVTY Mat , Ftype , Emiss or EMSVTY Mat , Ftype , Ndata Temp(1) , Emiss(1) : : Temp(Ndata) , Emiss(Ndata) OPERAND DESCRIPTION DEFAULT Mat Material number None Ftype Function type: None 0 = Constant emissivity 1 = Temperature dependent emissivity Emmis Emissivity None Ndata Number of temp/emissivity data pairs None Temp(i) Temperature of ith data pair None Emmis(i) Emissivity of ith data pair None DEFINITION EMSVTY specifies the emissivity of a particular object. REMARKS The emissivity may be specified as a constant value or as a set of discrete temperature/emissivity data pairs. If Ftype = 1 use the operand Emiss . If Ftype = 2 use the operands Ndata , Temp(i) , Emiss(i) . Each temperature/emissivity pair should be provided on a separate line. When temperatures lie within the specified data range, linear interpolation is used to determine the corresponding emissivity. When temperatures lie outside the specified data range, linear extrapolation is used to determine the corresponding emissivity. The emissivity is dependent on the material, the surface condition, and the temperature. Its value should be 0  Emiss  1. EMSVTY Page 2 of 2 The equation for radiation heat transfer is: qr = Boltzmann As Emiss (T4s- Etemp 4) where qr heat associated with radiation Boltzmann Boltzmann constant As surface area Emiss emissivity Ts surface temperature Etemp environmental temperature Applicable simulation types: Heat Transfer Non-Isothermal Deformation RELATED TOPICS Keywords: BLZMAN, ENVTMP ENVATM ENVATM Type, value (if constant) t1,C1 tn, CN OPERAND DESCRIPTION DEFAULT Type Environment atom content NONE =0 constant =1 function of time DEFINITION ENVATM sets the environment atom content for the simulation. EXAMPLE The atom content can be a function of time or constant. Example of atom content as a constant … ENVATM 0 .11 Example of atom content as a function of time … TIME(s) ATOM % 1 0.1 20 0.15 100 0.25 ENVATM 1 1 0.1 20 0.15 100 0.25 REMARKS Applicable Simulation Modules: Microstructure Applicable Simulation Modes: Diffusion ENVTMP ENVTMP Ftype, Etemp or ENVTMP Ftype, Ndata Time(1), Etemp(1) : : Time(Ndata), Time(Ndata) OPERAND DESCRIPTION DEFAULT Ftype Function type: 0 0 = constant environment temperature 1 = time dependent environment temperature Etemp Environment temperature 20 C or 68 F Ndata Number of time/temperature data pairs None Time(i) Time of ith data pair None Etemp(i ) Environment temperature of ith data pair None DEFINITION The environment temperature is used in radiation and convection heat transfer calculations and represents the room temperature of the area in which the manufacturing process is taking place. REMARKS The environment temperature may be specified as a constant value or as a set of discrete time/temperature pairs. If Ftype = 1 use the operand Etemp . If Ftype = 2 use the operands Ndata , Time(i) , Etemp(i) . Each time/temperature pair should be provided on a separate line. When process time lies within the specified data range, linear interpolation is used to determine the environment temperature. When process time lies outside the specified data range, linear extrapolation is used to determine the environment temperature. Applicable simulation types: Heat Transfer Non-Isothermal Deformation EXECMD EXECMD Opt Command OPERAND DESCRIPTION DEFAULT Opt Type of program (=0: DEFORM executables; =1: System executables) Command The command line to execute. DEFINITION EXECMD will execute either a program in the DEFORM executable directory or a system command. This is mainly used in Multiple Operation, where by specifying this keyword in the Master file (.MST), a separate program can be executed. REMARKS This keyword is mainly for internal use. The DEFORM executable directory is $DEFORM3_DIR/EXE on UNIX. Some arguments may be specified for the program. The maximum length of the command line is 200. RELATED TOPICS Preprocessor EXPAND EXPAND Material, Ftype, Expansion or EXPAND Material, Ftype, Ndata Temp(1), Expansion(1) : : Temp(Ndata), Expansion(Ndata) or EXPAND Material, Ftype, N1, N2 Temp(1) Temp (Ndata) Atom(1) Atom (Ndata) Expansion(1) Expansion(Ndata) OPERAND DESCRIPTION DEFAULT Material Material number None Ftype Function type: None 0 = Constant thermal expansion coeff 1 = Temperature dependent thermal expansion coeff 2 = Density dependent thermal expansion coeff (*) 3 = Atom dependent thermal expansion coeff (*) 4 = Temperature and Atom dependent thermal coeff (*) Expansion Thermal expansion coefficient None N1 Number of data pairs for the function or temp data When method=4 is selected N2 Number of atom data for method=4 Ndata Number of data None Temp(i) Temperature of i th data pair None Expansion(i) Thermal expansion coefficient of i th data pair None Density(i) Density dependent thermal expansion None Atom(i) Atom dependent thermal expansion None (*) denotes that the function type is used in the Heat Treatment Module only. DEFINITION EXPAND specifies the thermal expansion coefficient of a particular material. REMARKS The thermal expansion coefficient is used to determine the amount an elastic object expands due to temperature change. The temperature change is defined as the difference between nodal temperatures and the specified reference temperature (REFTMP). However, in case of heat treating, the thermal expansion coefficient is derived by using each phase's volume fraction. Therefore, the value is defined as follows: where: increment of thermal strain change increment of temperature change instantaneous thermal expansion coefficient for each phase The thermal expansion coefficient may be specified as a constant value or as a set of temperature/coefficient data pairs. The format is identical to YOUNG and POISON keywords. If Ftype = 0 use the operand Expansion. If Ftype = 1 use the operands Ndata, Temp(i), Expansion(i). Each temperature/coefficient pair should be provided on a separate line. When temperatures lie within the specified data range, linear interpolation is used to determine the corresponding thermal expansion coefficient. When temperatures lie outside the specified data range, linear extrapolation is used to determine the corresponding thermal expansion coefficient. If Ftype = 2 use the operands N1 and Density (i). If Ftype = 3 use the operands N1, and Atom(i). It should be noted that the atom variable refers to the weight percent of solute in the material. If Ftype = 4 use the operands N1, N2, Temp (i), Atom (i). The equation for linear thermal expansion is: l/l = Expansion (T-Rtemp) where l object length l change in object length Expansion thermal expansion coefficient T object temperature Rtemp reference temperature Applicable simulation types: Deformation Module Non-Isothermal Deformation Heat Transfer Microstructure Module FPERV FPERV bodyforce OPERAND DESCRIPTION DEFAULT bodyforce weight of body 0 DEFINITION FPERV allows for the weight of the material to be considered in the sintering simulation for the porous material. REMARKS The following equation is used to calculate the body force for porous materials. FPERV is the value that is entered in the text box in the Materials window. DENSTY is defined under elements. The units for FPERV are force per unit volume. It is integrated with respect to volume. RELATED TOPICS Step parameters Keyword: DENSTY [...]... the flow stress of material 3 had been measured at the strains, strain rates, and temperatures listed in Tables A.1 and A.2 The FSTRES keyword representation for ln-ln interpolation would be FSTRES 3, 2 3, 4, 2 0. 05, 0.30, 0.60 0.10, 1.0, 5. 0, 10.0 1800.0, 2000.0 8.3 355 , 9.9711, 10.6868 14.8227, 17.7313, 19.004 - ... material constant None n strain sensitivity index None m strain rate sensitivity index None y material constant None DEFINITION FSTRES specifies the flow stress for a particular material REMARKS Flow stress data can be entered as one of 5 flow stress function types, or as a user subroutine The FSTRES function for Ftype =1 is where material flow stress c material constant material strain n strain sensitivity... Flow stress at ith, jth, kth sampling point None (((Stress(i, j, k), i = 1, Nstrain), j = 1, Nsrate), k = 1, Ntemp) DEFINITION FSTRES specifies the flow stress for a particular material REMARKS Flow stress data can be entered as one of 5 flow stress function types, or as a user subroutine FSTRES Flow stress data that is in the form of sampled points can be entered with Ftype =2 or Ftype = 3 The data... heat energy DEFINITION FRAE2H specifies the fraction of mechanical work converted to heat REMARKS The conversion fraction would typically be 0.9  Factor  0. 95 Applicable simulation types: Non-Isothermal Deformation RELATED TOPICS Plastic object Keywords: UNTE2H FRCFAC FRCFAC Object1, Object2, FricType, DefType, Friction or FRCFAC Object1, Object2, FricType, DefType, Ndata Time/Press(1), Friction(1)... FricType Friction type None = 1 constant shear factor friction = 2 Coulomb friction = 3 Constant Tau FuncType Function type 0 =0 constant =1 f(time) =2 f(pressure) =3 f(temperature) =4 f(surface stretch) =5 f(pressure, temperature, surface stretch) Friction Friction coefficient when FuncType = 0 0 Ndata Number of Time/Press friction coefficient data pairs None SpdTyp Speed type: =1: contant; -n: following... BCCANG If no value is specified for DefXForce, DefYForce, and DefZForce they will be assumed to be zero Applicable object types: Elastic, Plastic, Elastoplastic, Porous RELATED TOPICS Boundary constraints Keywords: BCCDEF, BCCDFN, BCCFNC, BCCANG FSTRES Flow stress data can be defined as one of the 11 types, or as a user subroutine Each flow stress type is documented separately below FSTRES FSTRES Material,... FricType Friction type None = 1 constant shear factor friction = 2 Coulomb friction = 3 Constant Tau DefType Function type None =0 constant =1 f(time) =2 f(pressure) =3 f(temperature) =4 f(surface stretch) =5 f(pressure, temperature, surface stretch ) = -n friction coefficient is defined by user's routine n Friction Friction coefficient when FrictType = 0 Ndata Number of Time/Press friction coefficient data... strain rate sensitivity index y material constant Applicable simulation types: Isothermal Deformation Non-Isothermal Deformation EXAMPLE If the flow stress of material 3 could be expressed as The FSTRES keyword representation would be FSTRES 3, 1 103.8, 0.22, 0, 0 FSTRES FSTRES Material, Ftype Nstrain, Nsrate, Ntemp Strain(1) : Strain(Nstrain) Srate(1) : Srate(Nsrate) Temp(1) : Temp(Ntemp) Stress(i,j,k)... var1, var2, var3 OPERAND material ftyp DefType DESCRIPTION Material number Object number of second object Function type = 0 Cockroft & Latham = 1 McClintock = 2 Freudenthal = 3 Rice & Tracy = 4 Oyane = 5 Ayada = 6 Osakada = 7 Brozzo = 8 Zhoa & Huhn = -n user routine (n) fValue var1 var2 var3 Critical Fracture value parameter for specific equation parameter for specific equation parameter for specific... 2: Cylinder OriginA_X, OriginA_Y, OriginA_Z OriginB_X, OriginB_Y, OriginB_Z inner radius, outer radius if (FuncType =1-4) Time/Press(1), Friction(1) :: Time/Press(Ndata), Friction(Ndata) if (FuncType =5) Pres, NTemp, NStre Press(1), , Press(NPres) Temp(1), , Temp(NTemp) Stretch(1), , Stretch(NStre) Friction(1, 1, 1), , Friction(NPres, 1, 1), :: Friction(1, NTemp, NStre), , Friction(NPres, NTemp, NStre), . Example of atom content as a function of time … TIME(s) ATOM % 1 0.1 20 0. 15 100 0. 25 ENVATM 1 1 0.1 20 0. 15 100 0. 25 REMARKS Applicable Simulation Modules: Microstructure Applicable Simulation. used in Multiple Operation, where by specifying this keyword in the Master file (.MST), a separate program can be executed. REMARKS This keyword is mainly for internal use. The DEFORM executable. conversion fraction would typically be 0.9  Factor  0. 95. Applicable simulation types: Non-Isothermal Deformation RELATED TOPICS Plastic object Keywords: UNTE2H FRCFAC FRCFAC Object1, Object2,