论文部分内容阅读
Gleeble热力模拟实验机试样在电阻加热中温度分布很不均匀,试样中均温区的大小对实验操作和数据分析具有重要影响。本文利用Python程序通过前后处理器Mentat调用有限元软件Marc,用二分法对输入试样的热通量进行了优化计算,实现了试样按任意规定速度加热和冷却的模拟。计算结果表明,采用铜夹具对6 mm×70 mm C60钢试样加热,在自由宽度20 mm时,均温区长度只有4~5 mm。试样均温区的主要影响因素为自由跨度,自由跨度越大均温区长度越大。试样与夹具之间的接触传热系数对均温区影响不大,加热速度对均温区长度没有影响。
The temperature distribution of the Gleeble thermal simulation test machine in the resistance heating is very uneven. The size of the soaking zone in the sample has an important influence on the experimental operation and data analysis. In this paper, we use the Python program to invoke the finite element software Marc through the front and rear processors Mentat. The dichotomy is used to optimize the heat flux of the input sample, and the simulation of heating and cooling the sample at any given speed is realized. The calculation results show that the heating temperature of 6 mm × 70 mm C60 steel with copper fixture is only 4 ~ 5 mm when the free width is 20 mm. The main influencing factor of the sample temperature zone is the free span, the greater the free span is, the longer the temperature zone is. The contact heat transfer coefficient between the specimen and the fixture has little effect on the average temperature zone, and the heating rate has no effect on the length of the average temperature zone.