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Stress Analysis

Th features of Galileo (the stress solver) are explained here with some examples.

 

1. The deformation and the stress distribution can be solved for objects when they are loaded or are forced to displace.
    

   In Example 3 of Stress Analysis, a bar is fixed at one end, while the other end is forced to displace. The stress of the bar is analyzed.   Distributions of displacement and stress are solved.

2. Resonant modes can be solved as well.
    

   In Example 11 of Stress Analysis, resonant analysis is performed for a church bell.   Resonant frequencies and distributions of displacement and stress of each resonant mode are solved.

3. Thermal load due to the temperature change can be taken into account.
   
    

   In Example 7 of Stress Analysis, a piece of bimetal is analyzed. It consists of two sheets of different metals.   Distributions of displacement and stress are solved.

 

The functions of the stress analysis are listed below. For more examples, see [Example List for Stress Analysis].

Analysis Types	Static Analysis, Harmonic Analysis, Resonant Analysis, Transient Analysis *, Buckling Analysis, Large Deformation (Large Displacement/Large Strain *), Analysis with Initial Stress Taken into Account
Materials	Elastic Material (Isotropy, Anisotropy), Elasto-plastic Material (Bilinear/Multilinear, Isotropic/Kinetic Hardening)*, Creep (Power Law) Material *, Viscoelastic Material *, Hyperelastic Material * , Coefficient of Linear Thermal Expansion (Isotropy, Anisotropy). Temperature Dependency
Boundary Conditions	Displacement, Normal Displacement, Rotational Displacement, Acceleration, Lumped Load, Distributed Load, Pressure, Torque Load, Joint Load, Simple Contact, Contact (Friction), Spring Connection, Remote Load
Obtained Properties	Displacement, Stress, Strain, External/Reactive Force, Torque, Contact Force, Strain Energy, J Integral, Participation Factor, Effective Mass, Pressure at Contact Face, Contact Area
Miscellaneous	Acceleration, Centrifugal Force, Thermal Load (possible to be coupled with thermal analysis), Initial Strain, Birth/Death, Fatigue Life * Angular Velocity, Plane Strain, Plane Stress, and Analysis with Initial Stress Taken into Account

(*) Transient analysis, large strain, elasto-plastic material, creep material, viscoelastic material, hyperelastic material, and fatigue life are available in an optional package.

 

 

Various setting options are summarized below.

Options	Items	Static Analysis			Harmonic Analysis	Resonant Analysis	Buckling Analysis	Transient Analysis
		Single Step Linear Analysis	Single Step Nonlinear Analysis *1	Multiple Steps
3D Sheet Body	Plane Stress Element	Yes	Yes	Yes	Yes	Yes	No	Yes
	Shell Element	Yes	Yes *6	Yes	Yes	Yes	No	Yes
Large deformation (Geometric nonlinearity)	Large displacement	No	Yes	Yes	No	No	Yes (automatic)	Yes
	Large strain	No	Yes *6	Yes	No	No	No	Yes
Contact	Contact	No	Yes	Yes	No	No	No	Yes
	Simple Contact	Yes *5	Yes	Yes	Yes, only for "Slip" and "Off Contact"	No	No	No
Thermal Options	Thermal Load	Yes	Yes	Yes	No	No	Yes	No
	Constant Temperature	N/A	N/A	N/A	Yes	Yes	N/A	Yes
	Thermal Coupled Analysis	Yes	Yes *3	Yes *4	No	No	No	No
Velocity / Acceleration Options	Angular Velocity	Yes	Yes	Yes	No	No	Yes	No
	Acceleration	Yes	Yes	Yes	Yes	No	Yes	Yes
	Mass / Moment of Inertia	Yes	Yes	Yes	Yes	Yes	Yes	No
Nonlinear Materials	Mechanical Loss	No	No	Yes (viscoelasticity)	Yes	Yes	No	Yes (Coefficient of Rayleigh Damping, Viscoelasticity)
	Elasto-plastic Material *2	No	Yes	Yes	No	No	No	Yes
	Creep Material *2	No	No	Yes	No	No	No	Yes
	Viscoelastic Material *2	No	No	Yes	Yes, only for "Shear and Bulk"	No	No	Yes
	Hyperelastic Material *2	No	Yes	Yes	No	No	No	Yes
Material Options	Birth/Death	No	No	Yes	No	No	No	No
	Material Change	No	No	Yes	No	No	No	No
	Fatigue Life Assessment *2	No	No	Yes	No	No	No	No
Analysis with Initial Stress Taken into Account	N/A	No	No	No	Yes	Yes	No	No

 

 

(*1) Selected automatically depending on the material setting and other settings.

(*2) Transient analysis, large strain, elasto-plastic materials, creep materials, viscoelastic materials, hyperelastic materials, and fatigue life are available in an optional package.

(*3) Contact can be solved, but thermal solver cannot consider the contact state calculated in the stress analysis because the stress solver uses the results of the thermal analysis.

(*4) After multiple steps of heat history, thermal coupled steps are calculated.

(*5) Simple contact cannot is not executable if the shell elements exist in the model.

(*6) Large strain is not supported for shell elements.