Thermo-mechanical analysis of composites under combined conduction heating and large deflection bending Conference Paper uri icon

abstract

  • A novel conduction heating apparatus that combines thermal loading with large deflection bending is introduced, and its effectiveness for thermo-mechanical stress analysis was investigated. By clamping composite specimens (M40J/PMR-II-50, [0,90]s, a uni-tape cross-ply) on the radial sides of half cylinders having two different radii (78.74mm and 37.96mm), three different in-plane strains including a no strain condition were applied to the composites. Three different thermal loading experiments, 1) 23C to 196C to 250C, 2) 23C to 250C, and 3) 23C to 196C were performed as a function of mechanical in-plane strain levels. The apparatus was excellent enough to generate cracks related to the in-plane stresses (or strains) on plies. The quadratic failure criteria solution based on the thermal residual stresses shows a good agreement with the experimental results at low temperatures, but does not supply a good agreement at high temperatures. A weak adhesion of fiber/matrix interface at high temperatures (250C) might cause the de-bonding at the interface and subsequent exposure to 196C caused the intensive crack propagation.

name of conference

  • Materials

published proceedings

  • Proceedings of the ASME Materials Division

author list (cited authors)

  • Ju, J., Morgan, R. J., & Reddy, J. N.

citation count

  • 0

complete list of authors

  • Ju, Jaehyung||Morgan, Roger J||Reddy, JN

publication date

  • January 2005