In the case of thick composites, the layered shell theory can cause significant errors in the obtained results. In some cases, it is necessary to work with 3D models - also referred to as solid models. ACP has the unique feature that can generate layered solid models based on the shell lay-up definitions. ACP generates layered solid elements based on the shell mesh and the ACP composite definitions, thus representing one-to-one the composite part. Drop-offs, staggering and tapering are also considered. In addition, the solid model extrusion allows you to define extrusion directions and boundary curves.

In this section, the workflow of modeling a composite solid is outlined as it differs to some extent from shell modeling. Selected steps that differ from shell modeling are explained in more detail below and highlighted with a link.