About this Abstract |
| Meeting |
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Symposium
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2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
|
| Presentation Title |
Numerical simulation of DLP 3D-printed photopolymers |
| Author(s) |
Siyuan He, Kubra Sekmen, Daniel Weisz-Patrault, Andrei Constantinescu |
| On-Site Speaker (Planned) |
Kubra Sekmen |
| Abstract Scope |
Digital Light Processing (DLP) 3D printing enables rapid fabrication of complex geometries by selectively curing liquid photopolymer resin layer by layer. However, UV light penetration into previously cured layers induces depth-dependent shrinkage and viscoelastic deformation, which can generate residual stresses. To predict these effects, we propose a multiphysics finite element approach for DLP 3D-printed photopolymers. The model incorporates a macroscopic viscoelastic constitutive law in which the degree of cure serves as the internal variable and evolves as a function of the irradiation conditions, specifically UV light intensity and exposure time. After experimental calibration, the model is implemented through recurrence relations in an incremental, memory-efficient formulation. This approach enables effective prediction of the spatiotemporal residual stress distribution across the part cross-section by solving a sequence of two-dimensional plane deformation problems. |
| Proceedings Inclusion? |
Undecided |