(西北工業(yè)大學 機電學院，西安 710072)
摘 要:
基于輻射傳熱原理，建立液固擠壓復(fù)合材料過程模具傳熱的非穩(wěn)態(tài)有限元模型，采用有限元分析與實驗研究相結(jié)合的方法研究模具初始溫度場和液固擠壓過程模具溫度場的傳熱特性，得到了模具溫度場的變化趨勢及其對成形過程的影響規(guī)律，并對比研究了考慮模具預(yù)熱和初始模具溫度場恒定的數(shù)值模擬情況。結(jié)果表明，考慮預(yù)熱情況的模擬結(jié)果更加接近實際，且模擬結(jié)果與實驗結(jié)果吻合較好。
關(guān)鍵字: 液固擠壓；有限元法；模具溫度場
（School of Mechatronics, Northwestern Polytechnical University, Xi’an 710072）
Abstract:The model of non-linear temperature field of the die for liquid-solid extruding composites process is established, which considers the preheating, the heat radiation and the contacting heat transfer between the die and other media. By combining the numerical analysis with experimental testing, the radiation heating and extruding process are simulated using the commercial finite element code MARC. On the basis of researching the heat transfer characteristics, the initial distribution of temperature field of the die and the effect on the shaping process are obtained. Through comparing the simulation results considering the preheating with the stationary temperature field, it concludes that the former approaches to actual forming process. The simulation results are in good agreement with experimental measurements. The research of this paper found the base for designing the technology parameters properly of liquid-solid extrusion composites process.
Key words: liquid-solid extrusion; finite element analysis; temperature field of die
