Skip to main content
Article
Experimental and FEM Study of Thermal Cycling Induced Microcracking in Carbon/Epoxy Triaxial Braided Composites
Composites Part A: Applied Science and Manufacturing
  • Chao Zhang, University of Akron, main campus
  • Wieslaw K. Binienda, University of Akron, main campus
  • Gregory N. Morscher, University of Akron, main campus
  • Richard E. Martin
  • Lee W. Kohlman
Document Type
Article
Publication Date
3-1-2013
Abstract
The microcrack distribution and mass change in T700s/PR520 and T700s/3502 carbon/epoxy braided composites exposed to thermal cycling was evaluated experimentally. Acoustic emission was utilized to record the crack initiation and propagation under cyclic thermal loading between −55 °C and 120 °C. Transverse microcrack morphology was investigated using X-ray computed tomography. The differing performance of two kinds of composites was discovered and analyzed. Based on the observations of microcrack formation, a meso-mechanical finite element model was developed to obtain the resultant mechanical properties. The simulation results exhibited a decrease in strength and stiffness with increasing crack density. Strength and stiffness reduction versus crack densities in different orientations were compared. The changes of global mechanical behavior in both axial and transverse loading conditions were studied. By accounting for the obtained reduction of mechanical properties, a macro-mechanical finite element model was utilized to investigate the influence of microcracking on the high-speed impact behavior.
Citation Information
Chao Zhang, Wieslaw K. Binienda, Gregory N. Morscher, Richard E. Martin, et al.. "Experimental and FEM Study of Thermal Cycling Induced Microcracking in Carbon/Epoxy Triaxial Braided Composites" Composites Part A: Applied Science and Manufacturing Vol. 46 Iss. 1 (2013) p. 34 - 44
Available at: http://works.bepress.com/gregory_morscher/5/