Investigation of Interfacial Properties In Additive Manufacturing Via Molecular Dynamics Simulations and Experiments

Document Type

Conference Proceeding

Publication Date



Polymer Science and Engineering


Additive manufacturing (AM) has emerged as a powerful manufacturing technique for the rapid production of highly complex parts. Stereolithography (SLA) is an AM approach which selectively exposes liquid resin to a rastering UV laser to build parts in a layer-by-layer approach. While SLA and AM offer manufacturing advantages, inherent limitations exist due to heterogeneity in material properties brought about by this layer-by-layer additive approach. This heterogeneity stems from differences in the polymer-polymer interphase formed during the addition of each layer and bulk layer properties. In our research, we used a combined computational and experimental approach to probe differences in interphase and bulk material. Our experiments allow us to measure the impact of interphase volume on performance while Molecular Dynamics (MD) simulations offer the ability to study the underlying polymer structure that leads to the properties observed. Using these techniques in unison we gain a better understanding of how the interphase properties impact part performance.

Publication Title

CAMX 2018 - Composites and Advanced Materials Expo