5.11.6. RVE-related Mapping Options

For the RVE DETECT algorithm, specific properties for representative volume elements must be defined:

Num_RVEs = INT

The number of representative volume elements to be searched for through the thickness.

RVE# = INT INT;INT

Using this option, you can specify up to three part-IDs to define a specific RVE, allowing triaxially-braided representative volume elements to be defined. If only biaxial braids or woven materials are available, omit the final integer value. The final integer is interpreted as the reinforcing yarn, whereas the first two integers are considered as rotating yarns for braided composites. The reinforcing yarn should be seperated from the rotating yarns by a semi-colon.

RVE_TYPE = BRAID

Only braided or woven materials can be detected by the algorithm.

UD INT

Define the material ID which should be assigned in cases where only one fiber ID is found within the search radius.

BIAX_i INT

Define the material ID which should be assigned in cases where two fiber directions are found. The index i in BIAX_i points to a specific angle between the two fiber IDs. If several biaxial RVEs are defined, the material ID which points to the closest angle between the two fibers found in the RVE is assigned. The orientation projected onto the target mesh is derived as the average between the two rotating yarns.

TRIAX_i INT

Define the material ID which should be assigned in cases where three fiber directions are found. The index i in TRIAX_i points towards a specific angle between the two rotating yarn fiber IDs. If several biaxial RVEs are defined, the material ID which points to the closest angle between the two rotating yarn fibers found in the RVE is assigned. The direction used for projecting onto the element is derived from the reinforcing yarn direction.

FIBER_PRECENTAGE = DOUBLE

The mininum percentage of fibers which should be considered for the mapping. The Envyo application counts the overall number of fibers found within a specific search radius and checks if the ratio of each fiber is higher than the value specified here.