The next frontier in additive manufacturing (AM) lies in the process innovations that enable the integration of dissimilar materials within a single build. The NSF Industry–University Cooperative Research Center for the Science of Heterogeneous Additive Printing of 3D Materials (SHAP3D) unites industrial and academic partners to develop and demonstrate the process science required to achieve heterogeneous, multi-material printing. At the forefront of this effort is the development of Additive Ram Material Extrusion (ARME), a new process for the printing of fully compounded thermoset elastomers. The team University of Massachusetts Lowell overcame long-standing challenges associated with high-viscosity flow, in-situ curing, and thermoset–thermoplastic compatibility. The ARME process enables direct deposition of functional elastomers and dual-material printing that integrates flexible and rigid phases within a single structure—broadening design freedom and application potential. Complementary SHAP3D process innovations include Vibration-Assisted Multi-Powder (VAMP) printing, which allows solvent-free powder patterning and compositional gradients; hybrid additive–subtractive manufacturing, integrating in-situ machining within fused filament fabrication to achieve high precision and reduced cycle times; and topology-optimized foam printing, which embeds designed density and stiffness gradients through advanced process control. Together, these developments showcase SHAP3D’s core mission: establishing the processing–structure–property relationships needed to predict and control heterogeneous integration. By focusing on the process pathways that govern material co-deposition, adhesion, and interfacial control, SHAP3D is redefining the role of AM from shaping geometry to engineering functionality. This presentation will highlight how collaborative, multi-university research is advancing additive processes that expand the manufacturing toolbox and enable the scalable production of multi-material, multifunctional systems.
Learning Objectives:
Explain how the ARME process enables printing of fully compounded thermoset elastomers.
Describe methods to achieve compatibility between thermoset and thermoplastic materials in multi-material printing.
Recognize how material innovation drives property-focused design in additive manufacturing.
