View the keywords available for creating input files.
Keywords are presented as parents first and their child keywords following (if they have any). Any keywords on the same level are not presented in any particular order. A parameter enclosed within square brackets indicates an optional parameter.
*MATERIAL
At least one *MATERIAL keyword must be present. This keyword defines a new material to be solved for.
*MATERIAL UNITS, DENSITY, PLYT, TREF
Parameters
Data
*FVF
The *FVF keyword is a child of *MATERIAL and must be present. This keyword supplies fiber volume fraction information. For unidirectional materials, FVF represents the total fiber volume fraction for the composite. For woven materials, FVF specifies the tow fiber volume fraction.
*FVF FVF
Parameters
NONE
Data
*BVF
The *BVF keyword is a child of *MATERIAL and must be present for plain weave materials (Note: satin fabric materials are not supported in batch mode). This keyword supplies the bundle volume fraction information.
*BVF FILLBVF, WARPBVF
Parameters
NONE
Data
*DEGRADATION
The *DEGRADATION keyword is a child of *MATERIAL and must be present for plain weave materials. This keyword supplies the ratios of failed stiffness to virgin stiffness of the matrix and fiber constituents.
*DEGRADATION MATRIX_DEG, FIBER_DEG
Parameters
NONE
Data
*ENVIRONMENT
The *ENVIRONMENT keyword is a child of *MATERIAL. At least one *ENVIRONMENT keyword must be specified for each *MATERIAL. This keyword begins the definition of an environment containing a set of material properties for the current material.
*ENVIRONMENT, MOISTURE=AMBIENT/DRY/WET, TEMPERATURE=TEMP
Parameters
Data
NONE
*STRENGTHS
The *STRENGTHS keyword is a child of *ENVIRONMENT. For unidirectional composites the *STRENGTHS keyword data is:
*STRENGTHS T1, C1, T2, C2, S12, S23
Parameters
NONE
Data
For plain weave composites the *STRENGTHS keyword data is:
*STRENGTHS T1K, T1U, C1K, C1U, S12K, S12U
Parameters
NONE
Data
*LAMINA
The *LAMINA keyword is a child of *ENVIRONMENT and is required. This keyword gives the target elastic constants of the lamina. For unidirectional composites the material is assumed to be transversely isotropic with respect to the 2-3 plane. The data for *LAMINA for a unidirectional composite is:
*LAMINA E11, E22, NU12, NU23, G12, A11, A33
For plain weave composites the material is assumed to be orthotropic. If all material properties are known they can be supplied. Otherwise, the following properties can be supplied as zero and will be calculated by CMM: E33, NU13, NU23, G13, G23, and A33. The data for *LAMINA for a plain weave composite is:
*LAMINA E11, E22, E33, NU12, NU13, NU23, G12, G13, G23, A11, A22, A33
Parameters
NONE
Data
*FIBER
The *FIBER keyword is a child of *ENVIRONMENT and is required. This keyword gives the starting elastic constants of the fiber constituent. The fiber is assumed to be transversely isotropic with respect to the 2-3 plane.
*FIBER, [DEFAULT] E11, E22, NU12, NU23, G12, A11, A33
Parameters
Data
*MATRIX
The *MATRIX keyword is a child of *ENVIRONMENT and is required. This keyword gives the starting elastic constants of the matrix constituent.
*MATRIX, [DEFAULT], [LAW=TRANS23/ISO] E11, E22, NU12, NU23, G12, A11, A33
If LAW=ISO the data for the *MATRIX keyword is:
*MATRIX, LAW=ISO E, NU, A
Parameters
Data
*SOLVE
One (and only one) *SOLVE keyword must be present. This keyword gives the settings for the solving and output process.
*SOLVE, MATDIR=MATDIR MECHANICAL_MAX_ERROR, THERMAL_MAX_ERROR
Parameters
Data
*FATIGUE
The *FATIGUE keyword is a child of *ENVIRONMENT. This keyword begins the definition of a material containing fatigue data.
Parameters
NONE
Data
NONE
*SNDATA
The *SNDATA keyword is a child of *FATIGUE. This keyword begins the definition of the S-N fatigue data.
Parameters
NONE
Data
At least two data lines at a 0-2° load angle and two data lines at a 2-90° load angle are required to perform the optimization.