Thermal residual stresses in silicon-carbide/titanium (0/90) laminate
The current work formulated a micromechanical analysis of a cross-ply laminate and calculated the thermal residual stress in a very thick (0/90)[sub 2n] silicon-carbide/titanium laminate. Results were also shown for a unidirectional laminate of the same material. Discrete fiber-matrix models assuming a rectangular array of fibers with a fiber volume fraction of 32.5 percent and a three-dimensional, finite-element analysis were used. Significant differences in the trends and magnitudes for the fiber, matrix, and interface stresses were calculated for unidirectional and (0/90) models. Larger hoop stresses calculated for the (0/90) model indicate that it may be more susceptible to radial cracking when subjected to mechanical loading than the unidirectional model. The axial stresses in the matrix were calculated to be slightly larger for the (0/90) model. The compressive axial stresses in the fiber were significantly larger in the (0/90) model. The presence of the cross-ply in the (0/90) model reduced the constraint on the fiber, producing radial interface stresses that were less compressive, which could lead to earlier failure of the fiber-matrix interface.
- Research Organization:
- National Aeronautics and Space Administration, Hampton, VA (United States). Langley Research Center
- OSTI ID:
- 6840112
- Report Number(s):
- N-93-11072; NASA-TM--107649; NAS--1.15:107649; CNN: RTOP 763-23-41-85
- Country of Publication:
- United States
- Language:
- English
Similar Records
Stress-strain analysis of a (0/90)sub 2 symmetric titanium matrix laminate subjected to a generic hypersonic flight profile
Initial failure maps for fibrous CMC laminates
Related Subjects
360103* -- Metals & Alloys-- Mechanical Properties
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALLOYS
CALCULATION METHODS
CARBIDES
CARBON COMPOUNDS
COMPRESSIBILITY
ELEMENTS
FIBERS
FINITE ELEMENT METHOD
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
METALS
NUMERICAL SOLUTION
PHYSICAL PROPERTIES
RESIDUAL STRESSES
SILICON CARBIDES
SILICON COMPOUNDS
STRESSES
THERMAL STRESSES
TITANIUM
TITANIUM ALLOYS
TRANSITION ELEMENTS