Prediction of high temperature metal matrix composite ply properties

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7141719

Caruso, J J; Chamis, C C

The application of the finite element method (superelement technique) in conjunction with basic concepts from mechanics of materials theory is demonstrated to predict the thermomechanical behavior of high temperature metal matrix composites (HTMMC). The simulated behavior is used as a basis to establish characteristic properties of a unidirectional composite idealized an as equivalent homogeneous material. The ply properties predicted include: thermal properties (thermal conductivities and thermal expansion coefficients) and mechanical properties (moduli and Poisson's ratio). These properties are compared with those predicted by a simplified, analytical composite micromechanics model. The predictive capabilities of the finite element method and the simplified model are illustrated through the simulation of the thermomechanical behavior of a P100-graphite/copper unidirectional composite at room temperature and near matrix melting temperature. The advantage of the finite element analysis approach is its ability to more precisely represent the composite local geometry and hence capture the subtle effects that are dependent on this. The closed form micromechanics model does a good job at representing the average behavior of the constituents to predict composite behavior.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• OSTI ID: 7141719
• Report Number(s): N-90-17817; NASA-TM--102490; E--5280; NAS--1.15:102490; CONF-880483--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
COMPOSITE MATERIALS
EXPANSION
FINITE ELEMENT METHOD
FORECASTING
HIGH TEMPERATURE
MATERIALS
MATHEMATICAL MODELS
MATRIX MATERIALS
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
PHYSICAL PROPERTIES
POISSON RATIO
SIMULATION
THERMAL EXPANSION
THERMODYNAMIC PROPERTIES