Material flow

About: Material flow is a research topic. Over the lifetime, 3050 publications have been published within this topic receiving 36844 citations. The topic is also known as: material stream.

Energy and material flow modelling of additive manufacturing processes

Abstract: Additive manufacturing (AM) processes allow fabrication of three-dimensional complex parts. Due to the exact amount of material used during the manufacturing step, these new manufacturing processes...

Friction Stir Welding of Non-Heat-Treatable High-Strength Alloy 5083-O

Abstract: 5083 aluminum alloy is increasingly used because of its excellent corrosion resistance, high work-hardening rate, and strength. In order to improve its weldability and feasibility, material behavior, material flow, and defects induced while friction stir welding 5083 should be studied. In this study, they were investigated by thermo-structural analysis. The flow stress of 5083-O has a high rate of sensitivity among high temperatures and wide strain rate ranges. Therefore, the details of the mechanical properties of 5083-O at high temperatures and wide strain rate ranges were investigated to obtain reasonable analysis results using a precise flow stress model. The tool/workpiece interface temperature during FSW is critical for accurate analysis results. This study used special equipment to measure tool temperature in order to investigate the interface temperatures precisely, and then the obtained data were used for optimization and verification of the thermal boundary conditions for analysis modeling. Using the developed model, the material behavior and material flow during FSW of 5083-O were analyzed. The tool and workpiece interface temperatures, flow stresses, strain rates, and velocities were investigated with the cylinder and threaded probes in detail. One of the analysis results indicated that the material flow rate on the rear side of a probe directly affected defect generation while joining.

Laser scanning type bulk material flow detection and distribution error elimination method

Abstract: The invention discloses a laser scanning type bulk material flow detection and distribution error elimination method. Collecting point data and belt speed data of frames of section contours of a material stream are obtained; three-dimensional coordinates are built according to collecting point data and belt speed data; the material flow between adjacent frames is obtained through a triangulation network construction method, and the instantaneous flow rate of a unit time is obtained; the material stream sectional area is worked out by calculating the area difference between a material and a no-load belt scanned by a laser scanner, the area R defined by the straight line where the starting angle of each frame scanned by the laser scanner is located, the straight line where the termination angle of the frame scanned by the laser scanner is located and the corresponding material stream section contour in the material conveying process is calculated, and the material stream sectional area of each frame is obtained; the sectional area distribution error correction factor of the kth frame of the material stream is obtained; the corrected material stream sectional area is calculated. The laser scanning type bulk material flow detection and distribution error elimination method is simple in structure, high in automation degree and high in real time performance, and material distribution measurement is not influenced by dust, the weather, light and the like in the external environment.

Combination of job oriented simulation with ecological material flow analysis as integrated analysis tool for business production processes

Abstract: This paper outlines the application of a special Environmental Management Information System (EMIS) as combination of discrete event simulation with ecological material flow analysis for a selected production process. The software tool serves as decision aid for economic as well as ecological business problems. A combined view of the material flow as well as job-oriented view on an enterprise allows for a unified and efficient model building process. This contribution summarizes the underlying concepts and the experiences with the development and utilization of a suitable software tool following this integrated view and describes the concrete problems and solutions at the example of modeling a complex semiconductor fabrication.