【摘 要】
：
Mold filling in lately-developed Thixomolding(R) process is a complex process, of which numerical simulation is necessary for development. Governing equations a
【机 构】
：
Key Laboratory of Automobile Materials
论文部分内容阅读
Mold filling in lately-developed Thixomolding(R) process is a complex process, of which numerical simulation is necessary for development. Governing equations and numerical models are first given, and then the experiment and its filling simulation are carried out. The results demonstrate that the modeling temperature changes from 864 to 873 K when the barrel temperature is 873 K. The difference is primarily in the runner system, but nearly invariable in the part. Consequently, the slurry fills the cavity smoothly with low solid fraction, and the filling process finishes in 5 ms, the filling process completes successfully before solidification of the slurry, which has good agreement with the experiment. Through a snapshot of the filling process and defects tracking, drawbacks are displayed and confirmed in the experiment.
其他文献
文章针对船舶推进轴系多质量、多弹性支撑的工程实际结构，运用有限单元法，基于带弹性支撑、集中质量的纵横耦合振动梁单元的非线性刚度矩阵及质量矩阵，建立了结构有限元动力学分
夹层板系统（SPS）具有优良的力学性能，因此被广泛地应用于船舶修造过程。因其夹芯层具有良好的缓冲作用，所以可以用作耐撞结构以提高舰船的碰撞性能。文章基于大型商业有限元分析
Taylor杆常被用于确定材料动力学行为和损伤特性的常用实验。文章开展了低碳钢的霍普金森压杆实验和缺口拉伸实验，并基于J-C模型和B-W损伤模型确定了船用低碳钢的动力学特性。
文章运用计算流体力学和直接边界元方法计算叶轮旋向对喷水推进器水下辐射噪声性能的影响。首先，采用计算流体力学方法计算和分析了某喷水推进泵的裸泵性能曲线，并与厂商数据比
为了解决船舶以恒定速度在波浪中运动的水动力问题，文章开发了基于瞬时格林函数方法的三维时域计算程序。从数值精度和计算效率的角度出发，采用了精细时程法和一些数学上的推导
随着国际海事组织对船上噪声控制要求的提高及强制规则的出台，船舶噪声级成为民船设计中需要重点关注的指标之一。为了满足船上噪声限值要求，声学设计工作需要纳入船舶设计流程
Five kinds of Al-Zn-Mg-Cu-Zr based alloys with different Sc additions were prepared by ingot metallurgy. The effects of minor Sc on the microstructure and mecha
文章对船舶运动极短期预报技术进行了探讨和评价。论述了极短期运动预报的定义，从不同角度对极短期预报方法进行了分类。并对极短期预报方法的发展进行了叙述及讨论，分析了这些
A two-dimensional model was established in the rectangular co-ordinate to study the thermal stress in the sapphire single crystal grown by the improved Kyropoul
Effect of the deformed microstructure on mechanical properties of an orthorhombic (Ti2AlNb) based alloy of Ti-22Al-25Nb (mole fraction, %) has been investigated