Title: The Effect of Multi-Resin Domains in Spatially Resolved Additively Manufactured Parts

Authors: Ahmed M. H. Ibrahim, Giuseppe R. Palmese, Nicolas J. Alvarez

DOI: 10.33599/nasampe/s.22.0700

Abstract: There is a considerable interest in multi-material Additive manufacturing (AM) to leverage physical, optical, and mechanical properties of different polymer resins within a single printed part. For example, the incorporation of a brittle hard resin and a soft flexible resin into a part should result in the combination of high modulus and good toughness. However, many questions remain as to how the domains should be organized and what size domains are needed to optimize mechanical properties. In this work, we determine the effect of arranging spatial domains composed of two resins, one tough and one brittle, on linear and nonlinear mechanical properties.

There are many geometrical considerations of the spatial domains, e.g. the dimensions of the domains, the size ratios, and the geometrical organization (microstructure) of the resin domains. In this work, we examine the effect of two microstructures (stacked, checkered, and staggered), and different lengths and length ratios on test specimen mechanical properties.

The resin domains are printed using a variation of digital light processing (DLP) stereolithography with multiple resin vats and a custom printing protocol.

We find that the microstructure has a significant effect on the overall mechanical properties. Furthermore, the effect of domain size and size ratios of the resin domains strongly depends on the microstructure, and is an important design parameter in optimizing mechanical properties. Interestingly, the rigid matrix properties are dominant in controlling the overall properties of the composite.

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Conference: SAMPE 2022

Publication Date: 2022/05/23

SKU: TP22-0000000700

Pages: 8

Price: $16.00

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