摘要
纤维增强碳化硅陶瓷基复合材料(FRCMC)因其高比强度和比模量、以及优异的耐高温、耐腐蚀等性能已成为航空航天、轨道交通以及核能工业等领域的优选材料。尽管FRCMC是由成型技术制备,但一些加工工艺,例如磨削对于提升尺寸精度和表面完整性是必要的,在FRCMC结构件的高性能制造中不可或缺。然而,高硬度和脆性的材料属性及其结构上的不均质性和力学性能上的各向异性等特点是高效低损伤磨削加工的技术难点。磨削力作为反馈和控制生产过程质量和精度的关键信号,受磨削过程砂轮与工件几何学与运动学等多参数协同作用的影响,解析磨粒与工件的微观力学行为并建立磨削力预测模型,对深度理解材料去除机制、指导高性能制造至关重要。基于此,首先分析了磨削过程中材料特性及磨削参数对磨粒与FRCMC相互作用的影响规律,揭示了FRCMC磨削过程的材料去除机制。其次,系统回顾了FRCMC磨削力预测模型的研究现状,从单颗磨粒磨削力、磨粒几何学、纤维随机分布几何特性以及材料去除阶段判定准则分析推导了磨削力的建模过程。进一步的,从磨屑的成形机制、未变形切屑厚度、磨粒运动学等角度,分析了超声振动辅助磨削FRCMC的材料去除机制及磨削力力学行为的特殊性。最后,针对FRCMC材料去除机制和磨削力模型,分析了当前研究的潜在问题与研究热点。目标是为FRCMC制定可行的低损伤磨削准则,并建立溯源递进的理论框架以推动FRCMC磨削力模型的发展。
Fiber reinforced SiC ceramic matrix composites(FRCMC)have emerged as preferred materials in aerospace,nuclear energy,and other cutting-edge scientific and technological fields owing to their exceptional specific strength and modulus,as well as superior resistance to high temperatures and chemicals.Although FRCMC are prepared by molding techniques,some machining processes,such as grinding,are necessary to enhance dimensional accuracy and surface integrity,and are indispensable in the high-performance fabrication of FRCMC structural components.However,the innate material properties of high hardness and brittleness,coupled with structural characteristics such as anisotropy and non-homogeneity,pose challenges for efficient and low-damage grinding.The grinding force,serving as a crucial indicator for feedback and control in the production process,is influenced by synergistic effect of multiple parameters of the grinding process,such as wheel and workpiece geometry and kinematics.Therefore,elucidating the mechanical behavior of abrasive grains and work-pieces,and modeling the grinding force,are imperative for comprehending the processing mechanism and guiding efficient production practices.Based on this,the paper firstly analyzed the influence of material properties and grinding parameters on the interaction mechanism between abrasive grains and FRCMC during the grinding process.Secondly,the current research status of FRCMC grinding force prediction modeling was systematically reviewed.The modeling process of grinding force was analytically deduced from the grinding force of a single grain,the geometry of the grain,the geometric properties of the random distribution of fibers,and the criteria for determining the stage of material removal.Furthermore,it discussed the unique aspects of material removal mechanisms and grinding force modeling for ultrasonic vibration-assisted grinding of FRCMC from the viewpoints of the chips shaping mechanism,the thickness of the undeformed chips,and the kinematics of the abrasive grains.
作者
许文昊
高腾
刘德伟
徐培明
安庆龙
王一奇
丁文锋
李长河
XU Wenhao;GAO Teng;LIU Dewei;XU Peiming;AN Qinglong;WANG Yiqi;DING Wenfeng;LI Changhe(Key Lab of Industrial Fluid Energy Conservation and Pollution Control,Ministry of Education,Qingdao University of Technology,Qingdao 266520,China;Taishan Sports Industry Group Co.,Ltd.,Dezhou 253600,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China;College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2024年第9期4628-4653,共26页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(52375447)
山东省自然科学基金(ZR2023QE057,ZR2022QE028)。
关键词
陶瓷基复合材料
磨削
力学行为
材料去除机制
磨削力模型
超声振动
ceramic matrix composites
grinding
mechanical behavior
material removal mechanism
grinding force models
ultrasonic vibration
