Bilin Material: Difference between revisions

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|  style="width:150px" | '''$matTag ''' || integer tag identifying material
|  style="width:150px" | '''$matTag ''' || integer tag identifying material
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|-
|  '''$Fy ''' || yield strength
|  '''$K0 ''' || elastic stiffness
|-
|-
|  '''$E0 ''' || initial elastic tangent
|  '''$as_Plus ''' || strain hardening ratio for positive loading direction
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|  '''$as_Neg ''' || strain hardening ratio for negative loading direction
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|  '''$My_Plus ''' || effective yield strength for positive loading direction
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|  '''$My_Neg ''' || effective yield strength for negative loading direction
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|  '''$Lamda_S ''' || Cyclic deterioration parameter for strength deterioration
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|  '''$Lamda_C''' || Cyclic deterioration parameter for post-capping strength deterioration
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|  '''$Lamda_A''' || Cyclic deterioration parameter for acceleration reloading stiffness deterioration (is not a deterioration mode for a component with Bilinear hysteretic response).
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|  '''$b ''' || strain-hardening ratio (ratio between post-yield tangent and initial elastic tangent)
|  '''$Lamda_K''' || Cyclic deterioration parameter for unloading stiffness deterioration
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|  '''$a1''' || isotropic hardening parameter, increase of compression yield envelope as proportion of yield strength after a plastic strain of $a2*($Fy/E0). (optional)
|  '''$c_S''' || rate of strength deterioration
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|  '''$a2''' || isotropic hardening parameter (see explanation under $a1). (optional).
|  '''$c_C''' || rate of post-capping strength deterioration
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|  '''$a3''' || isotropic hardening parameter, increase of tension yield envelope as proportion of yield strength after a plastic strain of $a4*($Fy/E0). (optional)
|  '''$c_A''' || rate of accelerated reloading deterioration
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|  '''$a4''' || isotropic hardening parameter (see explanation under $a3). (optional)
|  '''$c_K''' || rate of unloading stiffness deterioration
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|}



Revision as of 23:01, 26 August 2010




This command is used to construct a bilin something or other

uniaxialMaterial Bilin $matTag $K0 $as_Plus $as_Neg $My_Plus $My_Neg $Lamda_S $Lamda_C $Lamda_A $Lamda_K $c_S $c_C $c_A $c_K $theta_p_Plus $theta_p_Neg $theta_pc_Plus $theta_pc_Neg $Res_Pos $Res_Neg $theta_u_Plus $theta_u_Neg $D_Plus $D_Neg

$matTag integer tag identifying material
$K0 elastic stiffness
$as_Plus strain hardening ratio for positive loading direction
$as_Neg strain hardening ratio for negative loading direction
$My_Plus effective yield strength for positive loading direction
$My_Neg effective yield strength for negative loading direction
$Lamda_S Cyclic deterioration parameter for strength deterioration
$Lamda_C Cyclic deterioration parameter for post-capping strength deterioration
$Lamda_A Cyclic deterioration parameter for acceleration reloading stiffness deterioration (is not a deterioration mode for a component with Bilinear hysteretic response).
$Lamda_K Cyclic deterioration parameter for unloading stiffness deterioration
$c_S rate of strength deterioration
$c_C rate of post-capping strength deterioration
$c_A rate of accelerated reloading deterioration
$c_K rate of unloading stiffness deterioration


Steel01 Material -- Hysteretic Behavior of Model w/o Isotropic Hardening

Steel01 Material -- Hysteretic Behavior of Model with Isotropic Hardening in Compression

Steel01 Material -- Hysteretic Behavior of Model with Isotropic Hardening in Tension


Code Developed by : by Dr. Dimitrios Lignos, Stanford University and was implemented by Dr. Theodore Karavasilis