Contact Mechanics of FGM Coatings
Abstract
The concept of grading the thermo-mechanical properties of materials provides an important tool to design new materials for certain specific functions. To take full advantage of this new tool research is needed not only for developing efficient processing methods and material characterization techniques but also for carrying out basic mechanics studies relating to the safety and durability of the FGM components. These studies may help to protect certain components against abrasion and wear at the surface where the maximum stress often occurs. Graded materials, also known as functionally graded maternals (FGMs), are generally two-phase composites with continuously varying volume fractions. Used as coatings and interfacial zones they can reduce thermally and mechanically induced stresses resulting from material property mismatch, increase the bonding strength and provide protection against adverse environments. In this study the contact problem for the FGM coatings is considered. The objective of the study is to obtain a series of analytical benchmark solutions for examining the influence of such factors as material inhomogeneity constants, the coefficient of friction, curvatures and various length parameters on the critical stresses that may have a bearing on the fatigue and fracture of the components with FGM coatings.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2000
- Accession Number
- ADA388666
Entities
People
- Fazil Erdogan
- Mehmet A. Guler
Organizations
- Lehigh University