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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.


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Journal ArticleDOI
TL;DR: A new material flow framework for paper industry in which the flow and stage structure supports the use of uniform definitions for terms related to paper recycling is introduced, termed the Detailed Wheel of Fiber.

11 citations

Journal ArticleDOI
28 May 2019
TL;DR: In this paper, the axial force and spindle torque of the welding process were collected through experiments, and the feasibility of the finite element model was verified by a data comparison.
Abstract: Friction stir welding (FSW) material flow has an important influence on weld formation. The finite element model of the FSW process was established. The axial force and the spindle torque of the welding process were collected through experiments. The feasibility of the finite element model was verified by a data comparison. The temperature field of the welding process was analyzed hierarchically. It was found that the temperature on the advancing side is about 20 °C higher than that on the retreating side near the welding seam, but that the temperature difference between the two sides of the middle and lower layers was decreased. The particle tracking technique was used to study the material flow law in different areas of the weld seam. The results showed that part of the material inside the tool pin was squeezed to the bottom of the workpiece. The material on the upper surface tends to move downward under the influence of the shoulder extrusion, while the material on the lower part moves spirally upward under the influence of the tool pin. The material flow amount of the advancing side is higher than that of the retreating side. The law of material flow reveals the possible causes of the welding defects. It was found that the abnormal flow of materials at a low rotation speed and high welding speed is prone to holes and crack defects. The forming reasons and material flow differences in different regions are studied through the microstructure of the joint cross section. The feasibility of a finite element modeling and simulation analysis is further verified.

11 citations

Journal ArticleDOI
TL;DR: In this article, a simulation-based examination on the deformation mechanism in the friction stir welding (FSW) process is conducted, which may not be efficiently feasible by experiment due to severe deformation and rotation of material flow near a tool pin.
Abstract: In this study, a simulation-based examination on the deformation mechanism in the friction stir welding (FSW) process is conducted, which may not be efficiently feasible by experiment due to severe deformation and rotation of material flow near a tool pin. To overcome the severity of distortion of plastically deforming finite element meshes in the Lagrange formulation, and an over-simplified elastic-plasticity constitutive law and contact assumption in the Eulerian formulation, the arbitrary Lagrangian–Eulerian (ALE) formulation is employed for the finite element simulations. Superior accuracy in predicting the temperature profiles and distributions of the friction stir welded aluminum alloy workpiece could be obtained compared to the results of Eulerian based simulations. In particular, the ALE based simulations could predict the sharper gradient of temperature decrease as the distance from the welding zone increases, while the Eulerian based model gives more uniform profiles. The second objective of the study is to investigate the coupling of simulation-based temperature histories into the strength prediction model, which is formulated on the basis of precipitation kinetics and precipitate-dislocation interaction. The calculated yield strength distribution is also in better agreement with experiment than that by the Eulerian based model. Finally, the mechanism of the FSW process is studied by thoroughly examining the frictional and material flow behavior of the aluminum alloy in the welded zone. It is suggested that the initially high rate of temperature increase is attributed to frictional heat due to slipping of material on the tool surface, and the subsequent saturated temperature is the result of sequential repetitive activations of the sticking and slipping modes of the softened material. The sticking mode is the main source of plastically dissipated heat by the large plastic deformation around the rotating tool pin. The present integrated finite element simulation and microstructure-based strength prediction model may provide an efficient tool for the design of the FSW process.

11 citations

Proceedings ArticleDOI
27 Jun 2013
TL;DR: This paper investigates and analyzes the production workflow in small and medium toy manufacturing enterprises by SADT and simulation analysis, and proposes collaborative architecture of toy material and production tracking system based on the Internet of Things to improve tracking accuracy and efficiency.
Abstract: Material safety and traceability is of great importance in toy manufacturing because there have been tougher requirements on toy product safety imposed by new international regulations. We investigate and analyze the production workflow in small and medium toy manufacturing enterprises by SADT and simulation analysis. We find out that tracking information is incomplete and information flow and material flow are out-sync due to lacking material and production process collaboration in current system. Thus, the tracking objective creates a need for systems to collaborate material flow and production flow in manufacturing enterprises. In this paper, aiming at enhancing efficiency of production, a new concept of collaborative material and production tracking based on a supply chain view is presented. Then we also propose collaborative architecture of toy material and production tracking system based on the Internet of Things to improve tracking accuracy and efficiency. Finally, we take the paint material for example to implement the production tracking system. The application example shows that it can collect real-time data accurately and reliably. This system has practical significance in improving product quality management and realizing enterprise information construction.

11 citations

Journal ArticleDOI
TL;DR: In this article, a strategy is proposed to select the most appropriate technique based on type of hang-ups, blockages and their location within the ore pass or waste pass system.
Abstract: A major operational issue in underground mines is the interruption of material flow in ore pass and waste pass systems. Although the design of ore pass systems can be optimised to minimise the occurrence of flow problems, it is unlikely that these can be entirely avoided. This article reviews the methods employed in Canadian mines to restore flow due to the formation of hang-ups and blockages. A strategy is proposed to select the most appropriate technique based on type of hang-ups, blockages and their location within the ore pass or waste pass system.

11 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023120
2022221
2021110
2020139
2019174
2018167