Direct Ink Write and Thermomechanical Characterization of Thermoset Composites

Sergio Dante Favela, University of Texas at El Paso


This research will be divided into two sections. The first section discusses direct ink writing and thermomechanical characterization for thermoset composites. The thermoset ink is prepared with fillers aiding the printing process by modifying the rheology of the ink and geometry retention by allowing for the part to have an initial UV cure step. Three specimen formulations with different weight percentages were printed by material extrusion in the shape of tensile specimens following ASTM standard D638 to characterize the mechanical properties at room temperature, 100℃ and 200℃. Furthermore, the ink resin was characterized through DSC, TGA, and rheology testing. The second section will discuss the detection of intentional defects on both curved and planar carbon fiber composites through non-destructive evaluation (NDE) methods. The main NDE technique used is ultrasonic testing (UT) by using a phased array probe. Different planar and curved composites were produced by compression pressing and molded vacuum bagging. UT was used to detect defects such as delaminations and inclusions at different layers, locations, and sizes. The data acquired from the composite panels was utilized to train an AI model to detect the category of defects, location, and depth.

Subject Area

Mechanical engineering|Polymer chemistry

Recommended Citation

Favela, Sergio Dante, "Direct Ink Write and Thermomechanical Characterization of Thermoset Composites" (2022). ETD Collection for University of Texas, El Paso. AAI30242362.