| 金蒙,赵岩,赵光光,符加彬,王加春.基于D-P本构的Vit1型金属玻璃激光加热辅助切削仿真研究[J].高技术通讯(中文),2019,29(10):1003~1011 |
| 基于D-P本构的Vit1型金属玻璃激光加热辅助切削仿真研究 |
| Simulation research of laser-assisted machining of Vit1 metallic glass based on D-P constitutive model |
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| DOI：10.3772/j.issn.1002-0470.2019.10.008 |
| 中文关键词: 金属玻璃； D P本构模型； 激光加热辅助切削； 仿真研究； 切削力 |
| 英文关键词: metallic glass, D-P constitutive, laser-assisted machining, simulation research, cutting force |
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| 摘要点击次数: 2913 |
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| 中文摘要: |
| 金属玻璃属于典型的难加工材料，为了提高切削加工性能，利用其强度和硬度对温度敏感的特性，提出金属玻璃的激光加热辅助切削加工，并以Vit1型金属玻璃为对象进行仿真研究。针对有限元软件中没有适用于金属玻璃本构模型的问题，构建了Vit1型金属玻璃的Drucker Prager本构模型，通过切削力仿真值与实验值的对比验证了本构模型的准确性。由于在有限元软件中无法直接定义和加载激光光源模型，利用Fortran语言编写了激光光源代码，并嵌入到有限元软件，然后将激光加热金属玻璃的梯度温度场数据加载到金属玻璃的二维切削仿真模型中，进行了切削仿真。仿真结果表明，在给定的切削用量下相比传统切削，采用激光加热辅助切削金属玻璃的最高温度降低15.1%，最大Mises应力降低23.3%，切削力降低36.1%，且稳定切削时切削力的波动幅度更小，表明了利用激光辅助切削的方式可以提高金属玻璃的切削加工性。 |
| 英文摘要: |
| Metallic glass is a typical hard-to-machine material. In order to improve the cutting performance, the temperature-sensitive characteristics of strength and hardness are used. Laser-assisted machining of metallic glass is proposed, and simulation is carried out on Vit1 metallic glass. In view of no accurate material constitutive model of metallic glasses in finite element software, D-P constitutive model of Vit1 metallic glass is constructed. By comparing the cutting force with simulation cutting force, it proves the accuracy of the model. The laser source can’t be directly defined and loaded in the finite element software, so the laster source code is written by Fortran language and embeded into the finite element software. Then the gradient temperature field of laser-heated Vit1 metallic glass is loaded into the two-dimensional cutting simulation model of metallic glass and cutting simulation is advanced. When comparing with normal cutting at the given parameters, the results show that the highest temperature of laster-assisted machining of Vit1 metallic glass is reduced by 15.1% and the maximum Mises stress by 23.3% and the cutting force by 36.1%. And there is a small fluctuation range during stable cutting of the cutting force that proves that the use of laser-assisted cutting to improve the machinability of metallic glass is an effective method. |
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