Nian LIU
金属学报(英文版)
The success in synthesizing high purity SnO2 nanobelts via self-propagating high temperature synthesis was achieved. According to the experimental results, a relationship between the residual heat of the reaction system at 2848 K and SnO2 nanobelts yield was identified. The most appropriate formula for this self-propagating high temperature synthesis method is turned out to be composed of Sn powder and thermite with weight ratio of 1:1.
关键词:
Optimal design
邵健
,
王芳
,
邓正泉
,
朱永伟
宇航材料工艺
doi:10.3969/j.issn.1007-2330.2014.05.009
用有限元方法分析超声调制电加工振动系统,探讨有、无负载时振动工具的动力学特性,通过ANSYS分析结果与理论计算值的比较,表明用有限元方法分析超声特性有较高精度;用ANSYS参数化方法设计、优化超声振动工具设计,通过振动系统的振动特性测试,验证了振动系统设计的合理性;通过微结构超声复合电解加工试验,证明超声调制电解方式加工难加工材料、异型面的技术优势.
关键词:
超声振动系统
,
变幅杆
,
动力学分析
,
优化设计
,
超声调制电加工
J.Brnic´
,
G.Turkalj
材料科学技术（英文）
Recent engineering design as well as material processing on the optimization procedure are based and computer oriented. Finite element stress and sensitivity analysis are the most important things in such modern determination of optimal solution. According to high computer capacity finite element continuum discretization and load application independent of the coming fields become unlimited. This paper deals with the development of a new finite elements generation used in shear stress analysis caused by S.Venant’s torsional load and bending with shear. Their stiffness matrices and load vectors on the basis of their geometrical properties are derived. For justification of new finite elements application some examples are presented.
关键词:
New finite elements
,
null
,
null
