PRIMARY PROCESS SELECTION AND PROCESS SEQUENCING AS THE PART OF PROCESS PLANNING
The field of our research is defining the main criteria for selection of primary processes and types of operations in production. Selection of primary process is based on nature of material, quantity, form complexity of the part, part size/mass and some other factors. Type and sequence operation are results of influence different factors as product shape, surface roughness and tolerance. In application will be used some aspects of knowledge base. Application will enable users to better understand procedure of selection primary process and sequence operations with possible additional technological gradation support. Self learning and testing of students is included in application. In application are used IT technologies of Visual Basic.NET.
PROCESS PLANNING APPLICATION AND INTERNET CONNECTION
This work is a part of the project creating the technological database necessary for improvement of process planning and connection database through SQL server by Internet environment. Developed web site for Database System and Process Planning is useful especially during development student’s project’s of technological process inside fields Process Planning, Production and Operations Management. Here we have elaborated the first phase of selecting tool machines, tools, operations and initial material on the basis of the chosen criteria.We have indicated the problems of selection and the possibility of working out a solution. The Internet technology gives us the possibility to share our data with many users and a chance to improve the elements of Virtual Manufacturing
Evaluation of buckling load and dynamic performance of steel shear wall retrofitted with strips made of shape memory alloy
One of the most imperfections of the steel shear wall is out of plane displacements that cause severe damage in both structural and non-structural elements. In this paper, the effects of shape-memory alloys on steel shear walls are investigated. First, a numerical analysis using the finite element method in ABAQUS software has been carried out according to an experimental test. The results of the numerical analysis have been verified with experimental results. Next, shape-memory alloy fibers have been added vertically and horizontally to various parts of the steel shear wall. The results show that retrofitting with the shape-memory alloy reduces the out-of-plane displacement of the steel shear wall under both cyclic and seismic loadings. Besides, the buckling load in the steel shear wall increases when it is retrofitted with the shape-memory alloy. Also, the total out-of-plane movement (accumulated absolute displacements) of the steel shear wall and non-structural damage are controlled by the characteristic of a shape-memory alloy material called “super-elastic”.