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 effects of high-strain rate dependency, thermal softening and strain rate-temperature coupling on the material flow stress were investigated using cooperative particle swarm optimization (CPSO) method.
Abstract: Advances in plasticity-based analytical modeling and finite element methods (FEM) based numerical modeling of metal cutting have resulted in capabilities of predicting the physical phenomena in metal cutting such as forces, temperatures, and stresses generated. However, accuracy and reliability of these predictions rely on a work material constitutive model describing the flow stress, at which work material starts to plastically deform. This paper presents a methodology to determine deformation behavior of work materials in high-strain rate metal cutting conditions and utilizes evolutionary computational methods in identifying constitutive model parameters. The Johnson–Cook (JC) constitutive model and cooperative particle swarm optimization (CPSO) method are combined to investigate the effects of high-strain rate dependency, thermal softening and strain rate-temperature coupling on the material flow stress. The methodology is applied in predicting JC constitutive model parameters, and the results are comp...
151 citations
TL;DR: In this paper, a brief summary of recent finite element simulation results for the friction stir welding process is presented, where the focus is on the characterisation of material flow around the rotating tool pin.
Abstract: A brief summary of recent finite element simulation results for the friction stir welding process is presented. The focus of the present study is on the characterisation of material flow around the rotating tool pin. Material flow patterns predicted by finite element simulations are found to compare favourably with experimental observations. The simulation results also reveal that material particles tend to pass and move behind the rotating pin from the trailing side, rather than both sides, of the pin. Possible variations in the material flow pattern due to variations in process parameters are discussed.
149 citations
TL;DR: In this paper, a thermal elastic-viscoplastic finite element model is used to evaluate the residual stresses remaining in a machined component, and an improvement in the accuracy of the predicted residual stresses is obtained by using a modified Johnson-Cook material model augmented by a linearly elastic component.
144 citations
TL;DR: In this paper, material flow in friction stir welding (FSW) under different process parameters is simulated by using the finite element technique based on the nonlinear continuum mechanics, and it seems that there is a quasi-linear relation between the change of the axial load on the shoulder and the variation of the equivalent plastic strain.
144 citations
TL;DR: A seamlessly integrated information management framework that can provide logistics information to project stakeholders for their decision making is developed and showed that it can improve time efficiency by about 32% compared to the traditional supply chain management.
144 citations