Abstract
Additive Manufacturing (AM) is a collective term for processes that join material, usually layer upon layer, to
make parts from 3D model data. AM creates parts with new, variable and anisotropic material properties,
innovative outer shape and advanced inner structures not possible to produce with subtractive and formative
technologies. Traditional CAD-representation (B-rep) assumes uniform material in the interior of parts and
represents the surfaces of an object. In 2018 new tri-variate spline representations were introduced in ISO 10303
(STEP) to support IGA, variable material and the advances shapes allowed by AM. There is an ongoing process to
add topological structures to STEP (V-rep) that compose trimmed trivariate spline volumes into larger objects.
The presentation will focus on how V-rep and IGA were used in the EC H2020 project www.caxman.eu (2015-
2018) to address simulation-based design for AM.
make parts from 3D model data. AM creates parts with new, variable and anisotropic material properties,
innovative outer shape and advanced inner structures not possible to produce with subtractive and formative
technologies. Traditional CAD-representation (B-rep) assumes uniform material in the interior of parts and
represents the surfaces of an object. In 2018 new tri-variate spline representations were introduced in ISO 10303
(STEP) to support IGA, variable material and the advances shapes allowed by AM. There is an ongoing process to
add topological structures to STEP (V-rep) that compose trimmed trivariate spline volumes into larger objects.
The presentation will focus on how V-rep and IGA were used in the EC H2020 project www.caxman.eu (2015-
2018) to address simulation-based design for AM.