Optimization of the manufacturing process of a titanium aluminide metal matrix composite using a viscoplastic constitutive theory
Article Abstract:
The application of a constant radial pressure to the silicon-carbide-fiber reinforced titanium-aluminide matrix composite, and cycling the composite between 300 and 600 degrees celsius, decreases the residual-stress-field. The reduction in the residual-stress-field minimizes the development of matrix cracks. The residual-stress-field is unaffected by cooling profiles and temperature and pressure holds of different time durations. The Ramaswamy-Stouffer constitutive model and the finite element method are used to determine the thermomechanical properties of the composite.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1996
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A phenomenologically based constitutive model for Rene 95
Article Abstract:
A constitutive model using a damage state variable is developed for the deformation characteristic analysis of various materials. The Ramaswamy-Stouffer constitutive model expresses the materials' important parameters, such as the inelastic-strain rate and back stress, in terms of an inelastic-flow equation. To evaluate its reliability, this model is employed in calculating the mechanical behavior of the Rene 95 under high temperature. Results indicate that the model is capable of investigating te different deformation processes involved in material deformation.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1992
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Application of a unified constitutive theory to the nonproportional multiaxial strain deformation of 1045 steel
Article Abstract:
The computer program UNIPRO was used to calculate material constants for the inelastic flow law. These constants were then compared with values computed from experimental data. Results show that values on 1045 steel agree with experimental data for cyclic hardening from biaxial loadings in relation to the phase angle. What the model now needs is a range of strain rates to be able to develop a material constant for analysis.
Publication Name: Journal of Engineering Materials and Technology
Subject: Science and technology
ISSN: 0094-4289
Year: 1992
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