Microstructure-based simulation of thermomechanical behavior of composite materials by object-oriented finite element analysis

While it is well recognized that microstructure controls the physical and mechanical properties of a material, the complexity of the microstructure often makes it difficult to simulate by analytical or numerical techniques. In this paper we present a relatively new approach to incorporate microstruc...

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Vydáno v:Materials characterization Ročník 49; číslo 5; s. 395 - 407
Hlavní autoři: Chawla, N., Patel, B.V., Koopman, M., Chawla, K.K., Saha, R., Patterson, B.R., Fuller, E.R., Langer, S.A.
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York, NY Elsevier Inc 01.12.2002
Elsevier Science
Témata:
Al/SiC composites
Applied sciences
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Materials science
Metals. Metallurgy
Microstructure-based modeling
Physics
Specific materials
Specific materials: fabrication, treatment, testing and analysis
Thermal expansion
WC/Co composites
Young's modulus
Al/SiC composites
Young's modulus
Thermal expansion
Microstructure-based modeling
WC/Co composites
Aluminium base alloys
Metal matrix composite
Digital simulation
Theoretical study
Silicon carbides
Thermomechanical properties
Dispersion strengthened metal
Finite element method
Composite materials
Imaging
Object oriented
Property structure relationship
Microstructure
ISSN:1044-5803, 1873-4189
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Popis
Shrnutí:While it is well recognized that microstructure controls the physical and mechanical properties of a material, the complexity of the microstructure often makes it difficult to simulate by analytical or numerical techniques. In this paper we present a relatively new approach to incorporate microstructures into finite element modeling using an object-oriented finite element technique. This technique combines microstructural data in the form of experimental or simulated microstructures, with fundamental material data (such as elastic modulus or coefficient of thermal expansion of the constituent phases) as a basis for understanding material behavior. The object-oriented technique is a radical departure from conventional finite element analysis, where a “unit-cell” model is used as the basis for predicting material behavior. Instead, the starting point of object-oriented finite element analysis is the actual microstructure of the material being investigated. In this paper, an introduction to the object-oriented finite element approach to microstructure-based modeling is provided with two examples: SiC particle-reinforced Al matrix composites and double-cemented WC particle-reinforced Co matrix composites. It will be shown that object-oriented finite element analysis is a unique tool that can be used to predict elastic and thermal constants of the composites, as well as salient effects of the microstructure on local stress state.
ISSN:1044-5803
1873-4189
DOI:10.1016/S1044-5803(03)00054-8