Axisymmetric Solid Element Orthotropic Material Property Definition
Description: Defines the material properties for linear orthotropic materials for solid axisymmetric elements.
Format:
Example:
| Field | Definition | Type | Default |
|---|---|---|---|
| MID | Material identification number. | Integer > 0 | Required |
| EX, ETH, EZ | Young's moduli in the x, θ , and z directions, respectively. | Real > 0.0 | Required |
| NUXTH, NUTHZ, NUZX | Poisson's ratios (coupled strain ratios in the xθ , zθ , and zx direction, respectively). | Real | Required |
| RHO | Mass density. | Real or blank | 0.0 |
| GZX | Shear modulus. | Real > 0.0 | Required |
| AX, ATH, AZ | Thermal expansion coefficients. | Real or blank | 0.0 |
| TREF | Reference temperature for the calculation of thermal loads. See Remark 8. | Real or blank | 0.0 |
| GE | Structural element damping coefficient. See Remarks 7 and 9. | Real or blank | 0.0 |
Remarks:
- The material identification number must be unique for all MATi entries.
- All seven of the numbers EX, ETH, EZ, NUXTH, NUTHZ, NUZX, and GZX must be specified.
- Material stability requires that
If either condition is not met, a warning message will be issued.
- MAT3 materials may only be referenced by the CTRIAX6 entry.
- The x-axis lies along the material axis (see Figure 2 in the CTRIAX6 entry). The θ-axis lies in the azimuthal direction. The z-axis is normal to both.
- The stress-strain relationship is:
where,
- To obtain the damping coefficient GE, multiply the critical damping ratio C/C0, by 2.0.
- TREF is used only as the reference temperature for the calculation of thermal loads in linear solutions. If TEMPERATURE(INITIAL) is specified, TREF will be ignored.
- If PARAM, W4 is not specified, GE is ignored in transient analysis. (See Section 5, Parameters, for more information on W4.)