Tuesday  |  Salon 13  |  04:20 PM–04:40 PM

#16192, Full-field Strain and Temperature Measurement of Epoxy Resin HexPly 8552 under Tension, Compression, and Shear Loading Conditions at Various Strain Rates

The material behavior of full composite system with unidirectional or woven fibers is dependent upon the strain rate sensitivity and strength properties of the polymer matrix within the system. In these experiments the thermomechanical response of HexPly 8552 epoxy resin subjected to tensile, compressive, and shear loading is investigated at strain rates of 0.001, 1, and 1000 sˉ¹. The full-field thermal and deformation response is measured in each experiment by utilizing simultaneous high-speed infrared thermography and Digital Image Correlation (DIC). The 0.001 and 1 sˉ¹ tests are carried out on a servo-hydraulic machine while the 1000 sˉ¹ tests are conducted on 3 different split-Hopkinson bars. A novel specimen design is implemented to study the material response in shear. The results show a reduction in temperature in the specimen during elastic deformation and an increase in temperature during plastic deformation regardless of loading condition. Strain rate effects are evident in the mechanical response of the material in tension and compression. The magnitude of the thermal and mechanical responses is largely dependent on the loading condition of the material.

Jarrod Smith   The Ohio State University
Michael Pereira   NASA Glenn Research Center
Jeremy Seidt   The Ohio State University
Amos Gilat   The Ohio State University