Energy Variables

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The energy variables used in the Structural Mechanics interfaces are summarized in Table 3-6.

Table 3-6: Energy Variables Used in Structural Mechanics
Variable	Description	SI Unit	Physics Interface1	Comment
phys.Ws	Elastic strain energy density	J/m3	solid, mbd, shell, plate, mbrn, beam, truss
phys.WsM	Membrane strain energy density	J/m2	shell, plate	Contributes to phys.Ws
phys.WsB	Bending strain energy	J/m2	shell, plate	Contributes to phys.Ws
phys.WsS	Shear strain energy	J/m2	shell, plate	Contributes to phys.Ws
phys.WsM	Membrane strain energy density	J/m	beam	Contributes to beam.WsL
phys.WsB	Bending strain energy	J/m	beam	Contributes to beam.WsL
phys.WsS	Shear strain energy	J/m	beam	Contributes to beam.WsL
beam.WsT	Torsional strain energy	J/m	beam	Contributes to beam.WsL
phys.WsL	Strain energy density per unit length	J/m	beam, truss	phys.Ws = phys.WsL/area
phys.Ws_tot	Total elastic strain energy	J	solid, mbd, shell, plate, mbrn, beam, truss	Global variable containing integration and summation of all phys.Ws contributions in a physics interface.
phys.Wk	Kinetic energy density	J/m3	solid, mbd, shell, plate, mbrn, beam, truss
phys.Wk_tot	Total kinetic energy	J	solid, mbd, shell, plate, mbrn, beam, truss	Global variable containing integration and summation of all phys.Wk contributions in a physics interface.
phys.Wp	Plastic dissipation density	J/m3	solid	Energy density dissipated by plasticity
phys.Wp_tot	Total plastic dissipation	J	solid	Global variable containing integration and summation of all phys.Wp contributions in a physics interface.
phys.Wc	Creep dissipation density	J/m3	solid	Energy density dissipated by creep.
phys.Wc_tot	Total creep dissipation	J	solid	Global variable containing integration and summation of all phys.Wp contributions in a physics interface.
phys.Wv	Viscoelastic dissipation density	J/m3	solid	Energy density dissipated by viscosity.
phys.Wv_tot	Total viscoelastic dissipation	J	solid	Global variable containing integration and summation of all phys.Wv contributions in a physics interface.
phys.Wed	Dielectric dissipation density	J/m3	solid	Piezoelectric electrical damping
phys.Wed_tot	Total dielectric dissipation	J	solid	Global variable containing integration and summation of all phys.Wed contributions in a physics interface.
phys.Wmd	Damping dissipation density	J/m3	solid	Piezoelectric mechanical damping
phys.Wmd_tot	Total damping dissipation	J	solid	Global variable containing integration and summation of all phys.Wmd contributions in a physics interface.
phys.I*	Mechanical energy flux, * coordinate	W/m2	solid, mbd
phys.Icomplex*	Complex mechanical energy flux, *coordinate	W/m2	solid, mbd	Frequency domain only
1The availability of physics interfaces is based on the license for a module.