Modeling of Mechanical Behavior of SLA Parts

In recent years, important efforts have been focused on producing functional parts using Stereolithography Apparatus ( SLA ). One of the applications is the development of rapid polymer tooling such as dies for injection molding. For these applications, optimal thermal as well as mechanical properties are of significance. In this paper, the mechanical behavior of the cured resin SL5170 is discussed by use of an elastic-viscoplastic material model. Uniaxial compression tests at different deformation rates are conducted. The stress-strain curves of these tests are predicted by the model, and comparisons of these results with experiments show good agreement.