Recent progress in developing ballistic and anti-impact materials:Nanotechnology and main approaches

With increasing international and civilian conflicts, developing advanced body armor has become an emerging field in academia and industry. Nanotechnology, by means of, incorporating nanomaterials, is considered a highly effective technique to achieve this goal. It has been widely studied in defense applications owing to high strength-to-weight ratios and excellent energy absorption capability of nanomaterials. Hence, this review encompasses the latest application of nanotechnology involving nan...     

Shielding and corrosion properties of the Alloy 709 as canister material for spent nuclear fuel dry casks

The shielding and corrosion properties of the Alloy 709 advanced austenitic stainless steel have been investigated as a candidate canister material in spent fuel dry casks. The results revealed that the experimental and computational data of the linear and mass attenuation coefficients of the alloy are in good agreement, in which the attenuation coefficient values decreased with increasing photon energy.Alloy 709 was shown to exhibit the highest linear attenuation coefficient against gamma rays ...     

Natural vibration of cantilever porous twisted plate with variable thickness in different directions

In this paper, the blade is assumed to be a rotating variable thickness cantilever twisted plate structure,and the natural vibrations of variable thickness cantilever twisted plate made of metal porous material are studied. It is assumed that the thickness of the plate changes along spanwise direction and chordwise direction, respectively, and it changes in both directions. The classical thin shell theory, the first and second fundamental forms of surface and von Karman geometric relationship ar...     

Ballistic impact response of flexible and rigid UHMWPE textile composites: Experiments and simulations

This study elaborates on the effects of matrix rigidity on the high-velocity impact behaviour of UHMWPE textile composites using experimental and numerical methods. Textile composite samples were manufactured of a plain-weave fabric(comprising Spectra? 1000 fibres) and four different matrix materials.High-velocity impact tests were conducted by launching a spherical steel projectile to strike on the prepared samples via a gas gun. The experimental results showed that the textile composites gradu...     

Effect of interactions of two holes on tensile behavior of patch repaired carbon/epoxy woven laminates

The conventional case of patch repair involves bonding a patch over single damage/hole in the laminate.This work investigates the effect of interaction of two holes on the tensile behavior patch repaired carbon epoxy woven laminates. The specimens of [0°/45°/45°/0°] laminates were repaired with adhesively bonded two-ply [45°]2external patches. Three different cases of drilled specimens were produced with different hole arrangements viz. specimens with single central hole(SH), with two holes alig...     

以科学发展观指导武警部队财务工作

党的十六届三中、四中全会以邓小平理论和“三个代表”重要思想为指导,明确地提出了“以人为本、全面、协调、可持续的发展观”和“构建社会主义和谐社会”的构想,这一重大战略思想成为统领我国经济社会发展全局的根本指针。作为社会全面建设的一部分,武警部队也需要从构建“和谐社会”的角度出发,以科学的发展观,规划各项建设。财务建设作为武警部队建设的重要方面,必须落实好科学发展观,用科学发展观来指导财务工作。一、以科学发展观指导财务工作要求各级党委必须树立科学的理财观科学发展观统揽着科学的理财观,科学的理财观实践着科学发…     

军队吸收和保留人才难的原因及对策

军队要吸收和保留高素质人才必须从物质和非物质待遇两方面着手。物质待遇上要进一步提高军队工资待遇水平,完善军队人才津贴制度,提供工资以外的物质条件。非物质待遇包括营造良好的工作生活环境,建立先进科学的业绩评价体系,完善军地人才流动机制等。     

学习贯彻新条令 争做合格的军人

新修订的共同奈令颁发后,江西省抚州军分区按照“掌握修订的、牢记常用的、精通本职的、了解相关的”要求,采取“原原本本学、新旧对照学、区分层次学、突出重点学、结成对子学、评比竞赛学”等方法,开展了“学习贯彻新条令,争做合格的军人”活动,在全区迅速掀起“宣传新条令、学习新条令、落实新条令”的热潮,     

一支部队的阅读调查 既要操好炮,又要读好书

读书好的道理人人皆知,为啥还是说做两张皮?读书难的问题解决了多少年,为啥还是涛声依旧?读杂书的现象层层引导,为啥还是良莠不分?咋读书的方法层出不穷,为啥还是读用脱节?透过对北京军区某机步旅炮兵团开展群众性读书活动的调查,也许会给我们带来启示和思考。     

卫星中心承力筒结构优化设计研究

利用有限元软件ANSYS建立复合材料中心承力筒式卫星平台结构的参数化有限元分析模型,计算了整星结构振动模态,在此基础上对复合材料蜂窝夹层中心承力筒结构分析模型进行简化,在满足结构的强度、变形、振动和屈曲约束条件下,对承力筒结构进行优化设计,并对多种方案进行比较,提出的方法和思路为今后同类结构设计提供了参考。