Solid Mechanics Material Properties: Fatigue Module These material property groups for material models in solid mechanics using the Fatigue Module (including their associated physical properties) can be added to models from the Material window. Table 9-13: Elastoplastic and Fatigue Behavior Material Properties Property Group and Property Name/Variable SI Unit Elastoplastic material>Ramberg-Osgood Cyclic hardening coefficient K_ROcyclic Pa Cyclic hardening coefficient n_ROcyclic 1 Fatigue Behavior>Energy-Based Darveaux Crack initiation energy coefficient K1_Darveaux 1 Crack initiation energy exponent k2_Darveaux 1 Crack propagation energy coefficient K3_Darveaux m Crack propagation energy exponent k4_Darveaux 1 Reference energy density Wref_Darveaux J/m3 Morrow Fatigue energy coefficient Wf_Morrow J/m3 Fatigue energy exponent m_Morrow 1 Fatigue Behavior>Fatigue Behavior>Approximate S-N Curve Transition stress sigmat Pa Transition life Nt 1 Endurance life Ne 1 Fatigue Behavior>General Endurance limit sigmae Pa Fatigue Behavior>Strain-Based Coffin-Manson Fatigue ductility coefficient epsilonf_CM 1 Fatigue ductility exponent c_CM 1 Shear fatigue ductility coefficient gammaf_CM 1 Shear fatigue ductility exponent cgamma_CM 1 Fatemi-Socie Normal stress sensitivity coefficient k_FS 1 Wang-Brown Normal stress sensitivity coefficient S_WB 1 Fatigue Behavior>Stress-Based Basquin Fatigue strength coefficient sigmaf_Basquin Pa Fatigue strength exponent b_Basquin 1 Shear fatigue strength coefficient tauf_Basquin Pa Shear fatigue strength exponent bgamma_Basquin 1 Findley Normal stress sensitivity coefficient k_Findley 1 Limit factor f_Findley Pa Matake Normal stress sensitivity coefficient k_Matake 1 Limit factor f_Matake Pa Normal Stress Limit factor f_NormalStress Pa