/PROP/SHELL is a property for quadrilateral shell elements
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/PROP/TYPE1/prop_ID/unit_ID or /PROP/SHELL/prop_ID/unit_ID | |||||||||
prop_title | |||||||||
Ishell | Ismstr | Ish3n | Idril | Ipinch | P_thickfail | ||||
hm | hf | hr | dm | dn | |||||
N | Thick | Ashear | Ithick | Iplas | |||||
Field | Contents | SI Unit Example |
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prop_ID | Property identifier. (Integer, maximum 10 digits) |
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unit_ID | Unit Identifier. (Integer, maximum 10 digits) |
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prop_title | Property title. (Character, maximum 100 characters) |
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Ishell | 4 node shell element formulation flag.= 0Use value in /DEF_SHELL.= 1 Default, if /DEF_SHELL is not definedQ4, visco-elastic hourglass modes orthogonal to deformation and rigid modes (Belytschko).= 2Q4, visco-elastic hourglass without orthogonality (Hallquist).= 3Q4, elasto-plastic hourglass with orthogonality.= 4Q4 with improved type 1 formulation (orthogonalization for warped elements).= 12QBAT shell formulation.= 24QEPH shell formulation. (Integer) |
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Ismstr | Shell small strain formulation flag. 4= -1Automatically set the best value according to element type and material law.= 0Use value in /DEF_SHELL.= 1Small strain from time = 0 (formulation compatible with all other formulation flags).= 2 Default, if /DEF_SHELL is not definedFull geometric nonlinearities with possible small strain formulation activation in Radioss Engine (option /DT/SHELL/CST).= 3Old small strain formulation (only compatible with Ishell = 2).= 4Full geometric nonlinearities (in Radioss Engine, option /DT/SHELL/CST has no effect).= 10Lagrange type total strain for hyperelastic material laws. (Integer) |
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Ish3n | 3 node shell element formulation flag.= 0Use value in /DEF_SHELL.= 1Standard triangle (C0).= 2 Default, if /DEF_SHELL is not definedStandard triangle (C0) with modification for large rotation.= 30DKT18.= 31DKT_S3, which based on DTK12 of BATOZ (refer to the Element Library in the Theory Manual). (Integer) |
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Idril | Drilling degree of freedom stiffness flag. 3= 0Use value in /DEF_SHELL.= 1Yes.= 2 Default, if /DEF_SHELL is not definedNo. (Integer) |
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Ipinch | Pinching degree of freedom flag. 12= 0Disable= 1Enable (Integer) |
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P_thickfail | Ratio of through thickness integration points that must fail before the element is deleted. 11
(Real) |
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hm | Shell membrane hourglass coefficient. 5 Only used when Ishell=1, 2, 3, 4. Default = 0.01 for Ishell =1, 2, 4. Default = 0.1 for Ishell = 3. (Real) |
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hf | Shell out-of-plane hourglass. 5 Only used when Ishell=1, 2, 3, 4. Default = 0.01 (Real) |
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hr | Shell rotation hourglass coefficient. 5 Only used when Ishell=1, 2, 3, 4. Default = 0.01 for Ishell =1, 2, 4. Default = 0.1 for Ishell = 3. (Real) |
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dm | For default values, refer to the table in Comment 7. (Real) |
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dn | Shell numerical damping. 6 It is only used for Ishell =12, 24 and Ish3n = 30 Default =0.015 for Ishell =24 (QEPH) Default =0.001 for Ishell =12 (QBAT) Default =0.0001 for Ish3n =30 (DKT18) (Real) |
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N | Number of integration points through the thickness with 0 < N < 10. 10= 0 (Default)Means global integration model for material LAW1, and automatically set N=3 for other material laws.= 1Membrane behavior. (Integer) |
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Thick | Shell thickness. (Real) |
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Ashear | Shear factor. Default is Reissner value: 5/6 (Real) |
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Ithick | Shell resultant stresses calculation flag. 8= -1Automatically set the best value according to element type and material law.= 0Use value in /DEF_SHELL.= 1Thickness change is taken into account.= 2 Default, if /DEF_SHELL is not definedThickness is constant. (Integer) |
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Iplas | Shell plane stress plasticity flag. 9 It is available for material laws 2, 22, 27 and 36.= -1Automatically set the best value according to element type and material law.= 0Use value in /DEF_SHELL.= 1 Default for LAW36 and global integration.Iterative projection with three Newton iterations.= 2 Default, if /DEF_SHELL is not defined or for LAW2 and global integrationRadial return. (Integer) |