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首页> 外文会议>Transactions of the North American Manufacturing Research Institution of SME >FINITE ELEMENT MODELING AND SIMULATION OF MICROMACHINING RANDOM MULTIPHASE MATERIALS
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FINITE ELEMENT MODELING AND SIMULATION OF MICROMACHINING RANDOM MULTIPHASE MATERIALS

机译：微加工随机多相材料的有限元建模与仿真

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摘要

Compared with lithographic techniques, mechanical micromachining is a potential competitive process for fabricating 3D micro/meso components or macro parts with micro-features from diverse materials at high accuracy, efficiency, and low costs, but the size effect induced by the comparable size of microstructures, cutting edge radius, and depth-of-cut results in a plowing dominated process. A methodology to incorporate model random microstructure in finite element analysis (FEA) of micromachining multiphase materials has been developed to understand the plowing, tribological, and heat transfer mechanisms. An internal state variable plasticity model has been developed to model the dynamic mechanical behavior including the effect of randomly distributed microstructure, materials damage and evolution. The simulated process variables including chip morphology, forces, and temperatures agree well with the observed experimental phenomena. The simulationrnrecovers the shearing-plowing transition and increased specific energy in micromachining.
机译：与光刻技术相比，机械微机械加工是一种潜在的竞争性工艺，可以以高精度，高效率和低成本从各种材料中制造具有微特征的3D微型/中观组件或具有宏观特征的宏观零件，但是由可比较的微结构尺寸引起的尺寸效应，切削刃半径和切削深度会导致刨削占主导地位。已经开发出一种将模型随机微结构纳入微加工多相材料的有限元分析（FEA）中的方法，以了解耕作，摩擦学和传热机理。已开发出内部状态变量可塑性模型来对动态力学行为建模，包括随机分布的微观结构，材料损坏和演变的影响。包括切屑形态，力和温度在内的模拟过程变量与观察到的实验现象非常吻合。该模拟恢复了微加工中的剪切-咬合过渡和增加的比能。

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