Fiber reinforced polymer(FRP) composite materials are heterogeneous and anisotropic materials that do not exhibit plastic deformation. They have been used in a wide range of contemporary applications particularly in s...Fiber reinforced polymer(FRP) composite materials are heterogeneous and anisotropic materials that do not exhibit plastic deformation. They have been used in a wide range of contemporary applications particularly in space and aviation,automotive,maritime and manufacturing of sports equipment. Carbon fiber reinforced polymer(CFRP) and glass fiber reinforced polymer(GFRP) composite materials,among other fiber reinforced materials,have been increasingly replacing conventional materials with their excellent strength and low specific weight properties. Their manufacturability in varying combinations with customized strength properties,also their high fatigue,toughness and high temperature wear and oxidation resistance capabilities render these materials an excellent choice in engineering applications.In the present review study,a literature survey was conducted on the machinability properties and related approaches for CFRP and GFRP composite materials. As in the machining of all anisotropic and heterogeneous materials,failure mechanisms were also reported in the machining of CFRP and GFRP materials with both conventional and modern manufacturing methods and the results of these studies were obtained by use of variance analysis(ANOVA),artificial neural networks(ANN) model,fuzzy inference system(FIS),harmony search(HS) algorithm,genetic algorithm(GA),Taguchi's optimization technique,multi-criteria optimization,analytical modeling,stress analysis,finite elements method(FEM),data analysis,and linear regression technique. Failure mechanisms and surface quality is discussed with the help of optical and scanning electron microscopy,and profilometry. ANOVA,GA,FEM,etc. are used to analyze and generate predictive models.展开更多
利用CO2多模激光器在车轮试样表面获得Co基合金熔覆层，通过 MMS-2 A 微机控制摩擦磨损试验机对比研究了不同轴重下轮轨试样的磨损性能与损伤机理.结果表明，车轮试样激光熔覆处理后熔覆层组织明显细化，表面硬度明显提高，约为基体的1...利用CO2多模激光器在车轮试样表面获得Co基合金熔覆层，通过 MMS-2 A 微机控制摩擦磨损试验机对比研究了不同轴重下轮轨试样的磨损性能与损伤机理.结果表明，车轮试样激光熔覆处理后熔覆层组织明显细化，表面硬度明显提高，约为基体的1．5倍.轮轨试样摩擦系数与磨损率随轴重增加而增大，车轮磨损率仅为钢轨的1/5~1/8；随时间增加，轮轨试样磨损量呈线性增长趋势；随轴重增加，轮轨试样表面损伤越严重，相同条件下，车轮试样损伤比钢轨轻微，轴重较小时，车轮熔覆层磨损主要为粘着磨损和氧化磨损，钢轨主要为疲劳磨损与氧化磨损.随轴重增加，轮轨试样主要为严重疲劳损伤，氧化磨损较为轻微.展开更多
文摘Fiber reinforced polymer(FRP) composite materials are heterogeneous and anisotropic materials that do not exhibit plastic deformation. They have been used in a wide range of contemporary applications particularly in space and aviation,automotive,maritime and manufacturing of sports equipment. Carbon fiber reinforced polymer(CFRP) and glass fiber reinforced polymer(GFRP) composite materials,among other fiber reinforced materials,have been increasingly replacing conventional materials with their excellent strength and low specific weight properties. Their manufacturability in varying combinations with customized strength properties,also their high fatigue,toughness and high temperature wear and oxidation resistance capabilities render these materials an excellent choice in engineering applications.In the present review study,a literature survey was conducted on the machinability properties and related approaches for CFRP and GFRP composite materials. As in the machining of all anisotropic and heterogeneous materials,failure mechanisms were also reported in the machining of CFRP and GFRP materials with both conventional and modern manufacturing methods and the results of these studies were obtained by use of variance analysis(ANOVA),artificial neural networks(ANN) model,fuzzy inference system(FIS),harmony search(HS) algorithm,genetic algorithm(GA),Taguchi's optimization technique,multi-criteria optimization,analytical modeling,stress analysis,finite elements method(FEM),data analysis,and linear regression technique. Failure mechanisms and surface quality is discussed with the help of optical and scanning electron microscopy,and profilometry. ANOVA,GA,FEM,etc. are used to analyze and generate predictive models.
文摘利用CO2多模激光器在车轮试样表面获得Co基合金熔覆层，通过 MMS-2 A 微机控制摩擦磨损试验机对比研究了不同轴重下轮轨试样的磨损性能与损伤机理.结果表明，车轮试样激光熔覆处理后熔覆层组织明显细化，表面硬度明显提高，约为基体的1．5倍.轮轨试样摩擦系数与磨损率随轴重增加而增大，车轮磨损率仅为钢轨的1/5~1/8；随时间增加，轮轨试样磨损量呈线性增长趋势；随轴重增加，轮轨试样表面损伤越严重，相同条件下，车轮试样损伤比钢轨轻微，轴重较小时，车轮熔覆层磨损主要为粘着磨损和氧化磨损，钢轨主要为疲劳磨损与氧化磨损.随轴重增加，轮轨试样主要为严重疲劳损伤，氧化磨损较为轻微.
