( 1. 株洲工學(xué)院 機(jī)械學(xué)院, 株洲 412008;
2. 中南大學(xué) 機(jī)電學(xué)院, 長(zhǎng)沙 410083)
摘 要: 針對(duì)快速超薄鑄軋材料、 幾何、 摩擦等多重非線性， 將鑄軋輥與板坯之間的力學(xué)行為視為熱彈塑性接觸問(wèn)題， 應(yīng)用無(wú)網(wǎng)格—有限元耦合方法建立了計(jì)算模型，該模型較好地解決了板坯劇烈變形有限元網(wǎng)格畸變問(wèn)題。 對(duì)軋制過(guò)程中軋制壓力分布進(jìn)行了分析， 得到其分布規(guī)律為軋制壓力在變形區(qū)中間區(qū)達(dá)到最大值， 而在入口和出口處逐漸減少。計(jì)算結(jié)果基本與實(shí)測(cè)結(jié)果吻合， 說(shuō)明該計(jì)算模型和計(jì)算是比較有效和可靠的。
關(guān)鍵字: 軋制壓力； 接觸問(wèn)題； 耦合模型
thin gauge roll-casting
（ Powder Metallurgy and Special Materials Department,
General Research Institute for Nonferrous Metals, Beijing 100088, China）
Abstract: As regarding the non-linearity of thin roll-casting materials, geometry and friction. The mechanics beheavior was taken as thermo-elastoplastic contact problem between the roller and slab. By using Element-Free Galerkin-Finite Element(EFG-FE) coupling method, computation model was established to overcome the inconvenience of applying remesh method, for the slab is deformed greatly which leads to the mesh distortion with the the traditional finite element simulation. The rolling force distribution was analyzed to obtain its character which reaches the maximum value in the centre of the rolling zone, while at the entrance and exit, the stress fades away. The results show that the calculated results by the coupling model are close to the measured ones.
Key words: rolling-force; contact problem; coupling model
