Transverse Tension Test
The transverse tension test was performed as per ASTM D3039. Fig. a shows transverse tension test specimen equipped with strain gauge to measure strain and modulus installed in the machine. The stress-strain diagram (Fig. b) shows linear behavior initially and experiences strain hardening before failure. There is a significant reduction in tensile stress for transverse specimens compared to longitudinal specimens. The tensile stress significantly depends on the fiber orientation. This strength also depicts the strength of adhesive (epoxy resin and matrix) binding the fiber layers within the specimen. Fig. c shows the mode of failure of the tested specimen. Failure is characterized by lateral cracks. Three-part failure code as per ASTM D3039 is LGM, L-lateral, G-Gauge, and M-Middle.
Specimen in test machine
Transverse tensile stress-strain diagram
Failure mode of transverse tension specimen