Topic
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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TL;DR: In this article, the material point method is proposed as a framework to model friction stir forming, which allows for the development of a fully coupled thermo-mechanical model which includes heat transfer processes due to plastic dissipation as well as frictional heating.
19 citations
01 Jan 2012
TL;DR: In this article, a preliminary investigation of the use of forging to produce bi-metallic components, through the production of a spur gear form, is described, and the experimental and simulation work described in this paper, provides knowledge of the effects of process variables on the outcome of forging bimetallic gears.
Abstract: High performance components, such as poppet valves, connecting rods, and pistons are manufactured from materials that pro- vide the necessary performance characteristics to withstand tough operating conditions. These materials usually possess high values of yield strength, Young's modulus, fatigue strength, and maintain them over a range of temperatures. Low density is also useful in compo- nents subjected to rapid speed changes. However, high performance materials, such as titanium alloys and stainless steels usually have a high density or are too costly to be used extensively. In many applications, high performance properties are required on particular surfaces or contact points, and are not necessary throughout the entire body of the component. One way of achieving this is to make components with more than one strategically located material. For practical reasons, normally the maximum number of alloys would be two. The work described in this paper is a preliminary investigation of the use of forging to produce bi-metallic components, through the production of a spur gear form. The experimental and simulation work described in this paper, provides knowledge of the effects of process variables on the outcome of forging bimetallic gears.
18 citations
TL;DR: In this article, a finite element (FE) model of transitional region was established based on DEFORM-2D software and validated by physical experiment, and a quick and easy method, which can measure the area of different local regions of forged part in DEFORM2D via user subroutine, was proposed to achieve the quantitative analysis of material flow mechanism.
Abstract: The material flow in transitional region plays an important role in the forming quality of transitional region in the isothermal local loading forming of titanium alloy large-scale rib-web component To study the material flow in transitional region, the finite element (FE) model of transitional region was established based on DEFORM-2D software and validated by physical experiment Then, a quick and easy method, which can measure the area of different local regions of forged part in DEFORM-2D via user subroutine, was proposed to achieve the quantitative analysis of material flow mechanism This technique can also be used in the analysis of other forming process, such as the calculation of fill ratio in forging process The material flow pattern of transitional region during local loading forming was analyzed step by step and compared with integral forming The results show that the material flow of transitional region during local loading process can be divided into six stages according to the material flow pattern and load-time curve Twice transverse material flow with opposite directions occurred in the first and second loading steps sequentially, which does not exist in the integral forming Four characteristic values evaluating the transverse flow of material, which are associated with the formation of defects and their severities, are defined and quantitatively measured at various processing conditions It is found that decreasing the spacer block thickness and increasing friction both can decrease the four characteristic values, thus weaken the transverse material flow, which are helpful to improve the forming quality in transitional region However, the transverse flow of material is little affected by the loading speed
18 citations
TL;DR: In this article, a coupled model of energy system models and material flow models is proposed to better assess and quantify the effects of material recycling on energy consumption and greenhouse gas emissions, and the barriers and challenges of a successful coupling are addressed.
Abstract: Recent studies focusing on greenhouse gas emission reduction strategies indicate that material recycling has a significant impact on energy consumption and greenhouse gas emissions. The question arises how these effects can be quantified. Material recycling is not at all or insufficiently considered in energy system models, which are used today to derive climate gas mitigation strategies. To better assess and quantify the effects one option would be to couple energy system models and material flow models. The barriers and challenges of a successful coupling are addressed in this article. The greatest obstacles are diverging temporal horizons, the mismatching of system boundaries, data quality and availability, and the underrepresentation of industrial processes. A coupled model would enable access to more robust and significant results, a response to a greater variety of research questions and useful analyses. Further to this, collaborative models developed jointly by the energy system and material analysis communities are required for more cohesive and interdisciplinary assessments.
18 citations
Patent•
06 Nov 2013
18 citations