Thermal-Stress Analysis Tab

Setting Item

Notes

Analysis Types

(for thermal analysis)

Steady-state analysis

There is no time dependency.

Transient analysis

Transient states are analyzed.

2D Approximation
(for stress analysis)

To perform the 2D analysis, select either one below.

Planar strain

If the object is fixed in the Y direction,

there will be no displacement in the Y direction.

Then we can take into account the X/Z components of the strain only.

This is called the planar strain approximation.

Plane stress

If the object's Y dimension is considerably smaller than the X/Z dimensions

and the object can deform freely in the Y direction,

we can assume that the stress has X/Z components only.

This is called the plane stress approximation.

Options

Notes

Ambient Temperature

Sets the ambient temperature.

Used for various temperature settings.

・Ambient temperature and ambient radiation temperature on the [Thermal] tab.

・Unless specified individually, the ambient temperature set here is used as the ambient radiation temperature.

Radiation Setting

Enables the settings relating to the radiation.

- Outer boundary condition setting

・Default value of emissivity

・Emissivity of each body attribute

・Emissivity of each boundary condition

Click to show [Radiation Setting] dialog box.

Large deformation
(for stress analysis)

Analyzes the geometric nonlinearity involving large deformation.

Large deformation means large rotation and strain of elements.

See Technical Note Analysis of Large Deformation (Geometric Nonlinearity for details.

- Select "Large displacement"

to have large rotation involved.

The total Lagrangian formulation with Green-Lagrangian strains is used.

- Select both "Large displacement" and "Large strain"

to have large rotation and large strain involved.

The updated Lagrangian formulation with logarithmic strain is used.

It is recommended to select "Large displacement" when you are selecting "Large strain".

- Select "Large strain"

to have large strain involved.

The updated Lagrangian formulation with logarithmic strain is used.

Iterative calculations will be performed for large deformation and the simulation will take longer.

Available for the static analysis only.

Acceleration
(for stress analysis)

Takes the weight of the model into account.

Not selectable in the resonant analysis.

Angular velocity
(for stress analysis)

Takes the centrifugal force into account.

Available for the axisymmetric or 3D static analysis.

The rotation axis is fixed to Z.

Thermal load
(for stress analysis)

Takes the thermal load into account.

If selected, the thermal load can be set on the thermal load tab.

Constrain the Freedom of Shells

(for stress analysis)

Available for the 3D analysis. If selected, the freedom of displacement in the rotational direction can be constrained on the mechanical tab.