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particle fracture and debonding during orthogonal machining of metal matrix composites

Advances in Manufacturing 2017年第1期5卷 77-82页

作者： A. Pramanik Liang-Chi Zhang Department of Mechanical Engineering Curtin UniversityBentley WA 6102 Australia School of Mechanical and Manufacturing Engineering University of New South Wales Sydney NSW 2052Australia

This paper investigates the particle fracture and debonding during machining of metal matrix composite （MMC） due to developed stress and strain, and interaction with moving tool by finite element analysis. The machining zone was divided into three regions： primary, secondary and tertiary deformation zones. The tendency of particles to fracture in each deformation zone was investigated. The findings of this study were also discussed with respect to the experimental results available in the literature. It was found that particles at the cutting path inthe tertiary deformation zone fractured as it interacted with tool. In the secondary deformation zone, particles interacted with other particles as well as cutting tool. This caused debonding and fracture of huge number of particles as those were moving up along the rake face with the chips. No particle fracture was noted at the primary deformation zone. The results obtained from finite element analysis were very similar to those obtained from experimental studies.

关键词： particle reinforced metal matrix composite particle fracture particle debonding Finite elementanalysis Strain distribution

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Simulation of rice grain breakage process based on Tavares UFRJ model

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PARTICUOLOGY 2024年第10期93卷 65-74页

作者： Shen, Shaohang Ji, Shouyu Zhao, Dan Han, Yanlong Li, Hao Sun, Ze Li, Zhuozhuang Li, Anqi Feng, Wenyu Fei, Jiaming Jia, Fuguo Li, Yang Northeast Agr Univ Coll Engn Harbin 150030 Peoples R China Northeast Agr Univ Sch Water Conservancy & Civil Engn Harbin 150030 Peoples R China Northeast Agr Univ Coll Food Sci Harbin 150030 Peoples R China

Understanding the breakage characteristics of rice grains is an important means to reduce rice breakage rate. However, the dynamic breakage mechanism of rice grain is unclear due to the lack of a reasonable breakage model. In this study, the uniaxial compression test and drop weight test of single rice were carried out, the breakage model of rice grain was constructed, the reliability of rice model was verified by the experiment and simulation results. The results showed that the fracture energy distribution of rice can be obtained by uniaxial compression test, the specific fracture energy of rice accords with a lognormal distribution, and the median specific fracture energy of rice is 479.75 J/kg. The damage accumulation coefficient and fragment size distribution of rice can be acquired by drop test, the result of damage accumulation coefficient of rice was 4.3. Rice grain breakage mainly occurs in the milling section of the vertical circulation rice mill. (c) 2024 Published by Elsevier B.V. on behalf of Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences.

关键词： Rice breakage mechanism Discrete element method Parameter calibration particle fracture DESIGN VARIABLES DEM

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An analytical approach to modeling stress-strain relationship of particle-reinforced metal matrix composites

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Rare Metals 2022年第11期41卷 3903-3910页

作者： Zhao-Bing Xiang Jun-Hui Nie Shao-Hua Wei Tao Zuo Jian-Zhong Fan National Engineering Technology Research Center for Nonferrous Metals Composites General Research Institute for Nonferrous MetalsBeijing100088China

An analytical model was established to simulate the stress-strain curves of particle-reinforced metal matrix composites by the classical stress equilibrium equation and secant modulus method,where particle cracking and matrix tearing were taken into *** stress-strain curves of the composites predicted by the model fit the experimental curves very *** stressstrain relationship of the matrix affected by the particles is predicted exactly,and it is found that the yield stress of the matrix is influenced obviously by the particle *** yield strength of the composites is also predicted by the model,and the results fit the experimental data very well.

关键词： Strengthening mechanism Yield strength particle fracture Matrix stress-strain curve

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Compressive response and microstructural evolution of in-situ TiB_(2)particle-reinforced 7075 aluminum matrix composite

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Transactions of Nonferrous Metals Society of China 2021年第5期31卷 1235-1248页

作者： Han WANG Hai-ming ZHANG Zhen-shan CUI Zhe CHEN Dong CHEN School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

The hot forming behavior,failure mechanism,and microstructure evolution of in-situ TiB_(2)particle-reinforced 7075 aluminum matrix composite were investigated by isothermal compression test under different deformation conditions of deformation temperatures of 300−450℃ and strain rates of 0.001^(−1)s^(−1).The results demonstrate that the failure behavior of the composite exhibits both particle fracture and interface debonding at low temperature and high strain rate,and dimple rupture of the matrix at high temperature and low strain *** dynamic recrystallization,which improves the composite formability,occurs under conditions of high temperature(450℃)and low strain rate(0.001 s^(−1));the grain size of the matrix after hot compression was significantly smaller than that of traditional 7075Al and ex-situ particle reinforced 7075Al matrix *** on the flow stress curves,a constitutive model describing the relationship of the flow stress,true strain,strain rate and temperature was ***,the processing maps based on both the dynamic material modeling(DMM)and modified DMM(MDMM)were established to analyze flow instability domain of the composite and optimize hot forming processing *** optimum processing domain was determined at temperatures of 425−450℃ and strain rates of 0.001−0.01 s^(−1),in which the fine grain microstructure can be gained and particle crack and interface debonding can be avoided.

关键词： in-situ TiB2 particles aluminum matrix composite hot compression deformation particle fracture interface debonding dynamic recrystallization

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Microstructure-based three-dimensional characterization of chip formation and surface generation in the machining of particulate-reinforced metal matrix composites

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International Journal of Extreme Manufacturing 2020年第4期2卷 74-85页

作者： Qi Wu Liangchi Zhang School of Mechanical and Manufacturing Engineering The University of New South WalesNSW 2052Australia Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongPeople’s Republic of China

Particulate-reinforced metal matrix composites(PRMMCs)are difficult to machine due to the inclusion of hard,brittle reinforcing *** experimental investigations rarely reveal the complex material removal mechanisms(MRMs)involved in the machining of *** paper develops a three-dimensional(3D)microstructure-based model for investigating the MRM and surface integrity of machined *** accurately mimic the actual microstructure of a PRMMC,polyhedrons were randomly distributed inside the matrix to represent irregular SiC *** fracture and matrix deformation and failure were taken into *** the model’s capability comparison,a two-dimensional(2D)analysis was also *** cutting experiments showed that the established 3D model accurately predicted the material removal,chip morphology,machined surface finish,and cutting *** was found that the matrix-particle-tool interactions led to particle fractures,mainly in the primary shear and secondary deformation zones along the cutting path and beneath the machined *** fracture and dilodegment greatly influences the quality of a machined *** was also found that although a 2D model can reflect certain material removal features,its ability to predict microstructural variation is limited.

关键词： particulate-reinforced metal-matrix composites MMCs finite element three-dimensional modelling particle fracture material removal surface integrity

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