Workability Theory of Materials in Plastic Deformation Processes. (2005)
Kobayashi,Shiro, Lee,C. H., Oh,S. I.
The investigation is aimed at establishing a workability criteria in upsetting and rolling with reference to occurrence of free surface cracks. A review of the background on workability is given,...
A New Approach For Block-Floating-Point Arithmetic (2002)
Shiro Kobayashi, Gerhard P. Fettweis
A new approach for implementing block-floating-point arithmetic is proposed. This approach intends to preserve the least-significantbits (LSBs) to improve signal processing quality. The preservation...
Deformation Mode of Void-Growth and Coalescence in the Process of Ductile Fracture. (2002)
The objective of this investigation was to develop a fracture criterion applicable to the prediction of the occurrence of cracks in metal-working processes. A model for large void growth was...
Shah,S. N., Kobayashi,Shiro, Oh,S. I.
The objective of this investigation was to establish theories on flow and fracture in order to apply workability theory to metalworking processes. It has been shown in the application to upsetting...
Chen,C. C., Oh,S. I., Kobayashi,Shiro
This investigation applies theories on flow and fracture in metalworking processes to prediction of workability of materials in axisymmetric bar extrusion and drawing, with special reference to...
Kim,J. H., Oh,S. I., Kobayashi,Shiro
This report describes the development of a finite-element model for analyzing sheet-metal forming processes. Materials are assumed to be rigid-plastic with the view that the usefulness of an analysis...
Rigid-Plastic Finite-Element Analysis of Plastic Deformation in Metal-Forming Processes. (2002)
Metal-forming processes of extrusion, drawing, ring compression, and closed-die forging were analysed by the rigid-plastic finite-element method. According to the individual problem characteristics,...
Fracture Criterion for Materials in Plastic Deformation Processes. (1999)
The investigation is aimed at establishing the workability of aluminum alloy 7075-T6 in upsetting and rolling at room temperature with reference to occurrence of free-surface cracks. The fracture...
COMPUTER APPLICATION TO THE VISIOPLASTICITY METHOD. (1998)
Procedures for using a computer for the complete solution to plane strain as well as axisymmetric deformation problems have been developed. The velocity, strain rate, total effective strain, and...
COMPUTER PROGRAMS FOR THE ANALYSIS OF AXISYMMETRIC EXTRUSIONS. (1998)
Shabaik,A., Lee,C. H., Kobayashi,Shiro
Thpe use of a computer for calculating complete solutions of axisymmetric extrusions by the visioplasticity method was developed. (Author)
The principal aim during the first year of investigation was to develop a theoretical method of analysis for obtaining the detailed mechanics of the extrusion process, with special reference to...
Study of Deformation and Defects Occurrence in Advanced Forging Technique. (1998)
Kobayashi,Shiro, Sohrabpour,S., Sehgal,M. M.
A two-part investigation was performed to study the relationship between defects formation and deformation characteristics in plane-strain side-pressing and axisymmetric plastic indentation. In the...
Kobayashi, Shiro, Altan, Taylan, Lambert, Etienne R.
The analytical prediction of defects encountered in extrusion requires a knowledge of the properties of the material and the mechanics of the deformation process. New developments in the upper-bound...
Analytical Prediction of Defects Occurrence in Simple and Complex Forgings. (1998)
Kobayashi, Shiro, Shabaik, A. H., Lee, C. H.
A three-part investigation was performed in the area of simple forging, such as upsetting cylinders, rings and slabs to study the relationship between friction at the tool-workpiece interface and the...
Tang,Ming-Ching, Kobayashi,Shiro
See also Part 1, AD-A131 459.
An investigation of the mechanics of sliding friction--[microform] /--by Shiro Kobayashi. (1957)
Thesis (M.S. in Mechanical Engineering)--University of California, Berkeley, Sept. 1957.
An investigation of the mechanics of sliding friction /--by Shiro Kobayashi. (1957)
Thesis (M.S. in Mechanical Engineering)--University of California, Berkeley, Sept. 1957.