Search
Now showing items 1-10 of 22
Thermo-fluid modeling of direct chill casting of metal alloys using an inverse finite element method
(Publ by Computational Mechanics Inc, 1992)
Direct chill (DC) casting is used extensively in the production of wrought nonferrous metals and alloys, particularly in the aluminum industry. For alloys, a semi-solid region known as the “mushy zone” and defined by the ...
Two-phase model for processing materials in semisolid state
(Affiliation: Worcester Polytechnic Inst, Worcester, United StatesCorrespondence Address: Alexandrou, Andreas N.Worcester Polytechnic Inst, Worcester, United States, 1998)
The importance of processing of metal and metal matrix composites in semisolid state is increasing quite rapidly due to the distinct advantages it offers over similar methods of near-net-shape making. In this investigation ...
Thixotropy of semisolid metals
(Materials Research Society, 2000)
Understanding the time-dependent flow behavior of metal alloys in semisolid state is essential for the further development of the process. In the present investigation, the thixotropic behavior of semisolid slurries is ...
Transient flow characteristics and properties of semi-solid aluminum alloy A356
(Affiliation: Advance Casting Research Center, Metal Processing Institute, WPI, Worcester, MA 01609, United StatesAffiliation: Department of Mechanical and Industrial Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, CyprusCorrespondence Address: Tonmukayakul, N.Advance Casting Research Center, Metal Processing Institute, WPI, Worcester, MA 01609, United States, 2004)
Development of numerical models to simulate flow characteristics of semi-solid metals in the die cavity requires a good understanding of the transient and equilibrium flow properties of semi-solids and knowledge of the ...
Time-dependent rheology of semisolid metal suspensions
(Affiliation: Metals Processing Inst, Worcester, United StatesCorrespondence Address: Burgos, Gilmer R.Metals Processing Inst, Worcester, United States, 1999)
Understanding the time-dependent flow behavior of semisolid materials (SSM) is essential for the simulation of semisolid processes. During processing, the structure of the material changes with the processing history due ...
3-D flow of Herschel-Bulkley fluids
(ASME, 1998)
The flow of Herschel-Bulkley fluids through a sudden 3-D square with expansion height ratio of 2:1 is studied numerically by solving the mass and momentum conservation equations along with a continuous constitutive relation. ...
First-passage study and stationary response analysis of a BWB hysteresis model using quasi-conservative stochastic averaging method
(1995)
The quasi-conservative stochastic averaging (QCSA) method is applied to a Bouc-Wen-Baber hysteretic system (BWB) under Gaussian white noise excitations. The stationary probability density of the system's response amplitude ...
Yield behavior of commercial Al-Si alloys in the semisolid state
(2004)
Systematic experimental work and modeling efforts have been conducted to characterize the yield behavior of commercial aluminum alloys in the semisolid state. In this study, extensive compression experiments were performed ...
Vortex shedding lock-on in a periodic freestream flow past a circular cylinder
(Publ by ASME, 1993)
Vortex lock-on phenomena in flow past a circular cylinder with a periodic component superimposed on the mean free stream flow is investigated using concepts from dynamical systems (chaos) theory. Numerical results show ...
Compression molding of semi-concentrated fiber suspensions: Flow and fiber orientation
(Publ by ASME, 1993)
The focus of this paper is compression molding of semi-concentrated fiber suspensions. During compression molding a premeasured amount of raw material (charge) is placed between two halves of a die. The die is then closed ...