本文選題：絕熱剪切 + 背水靶板　； 參考：《船舶力學》2017年03期

【摘要】：絕熱剪切效應是材料破壞的重要機理之一。文章開展了動態(tài)沖擊作用下的材料絕熱剪切試驗,計算了絕熱條件下材料的塑性溫度升高。建立了背水靶板的FEM全流固耦合模型,采用考慮了溫度效應的Johnson-cook模型開展了爆炸破片侵徹艦船液艙艙壁過程的計算。結果表明:(1)材料在高應變率下的絕熱溫升不可忽略;(2)彈體侵徹背水靶板過程可分為4個典型階段,分別為墩粗鑿坑階段、碰撞形成速度共同體階段、絕熱剪切階段和擾動液體階段;(3)考慮溫度效應的剩余速度明顯小于不考慮溫度效應的剩余速度;速度較低時,是否考慮溫度效應預測的剩余速度值差異較小,隨著初始速度的增大,差異逐漸增大。
[Abstract]:Adiabatic shear effect is one of the important mechanisms of material failure. In this paper, the adiabatic shear test of the material under dynamic impact is carried out, and the plastic temperature rise of the material under adiabatic condition is calculated. The FEM full fluid-structure coupling model of backwater target plate is established. The Johnson-cook model considering temperature effect is used to calculate the penetration process of explosive fragments into ship tank bulkhead. The results show that the adiabatic temperature rise of the material at high strain rate can not be ignored. The penetration process of the projectile into the backwater target can be divided into four typical stages: the crater stage and the velocity community stage. In adiabatic shear stage and disturbed liquid phase, the residual velocity considering temperature effect is obviously smaller than that without temperature effect, and when the velocity is low, the difference between the predicted residual velocity values of temperature effect and that of temperature effect is small. With the increase of initial velocity, the difference increases gradually.
【作者單位】： 武漢理工大學交通學院;
【基金】：Supported by the Natural Science Foundation of China(No.51408450) the Fundamental Research Funds for the Central Universities(No.2014-yb-20) the open fund of the State Key Laboratory of Nonlinear Mechanics(LNM201505)~~
【分類號】：O385

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