织物-树脂复合材料层压板的准静态侵彻机理

本文利用MTS得到了芳纶和高强维纶织物复合材料层压板受尖头侵彻体穿孔的准静态侵彻曲线 ,比较和分析了不同类型纤维集合体与热固性树脂和热塑性树脂复合材料的破坏模式 ,并考察了芳纶织物复合材料层压板侵彻的逐步破坏过程 ,揭示了复合材料层压板的准静态侵彻机理。     

镁基储氢材料的研究进展

本文回顾和总结了近几十年来，特别是近十年来镁基储氢材料的发展情况，重点综述了机械合金化Mg-Ni2合金体系的研究情况及其近期的进展，从储氢材料成份及配比，制造工艺改进以及材料的组织结构对材料性能的影响等各方面进行一定的分析和归纳，对储氢材料研究中出现的问题以及今后的发展方向都作了探讨。     

Controlling mechanical systems with backlash—a survey

Backlash is one of the most important non-linearities that limit the performance of speed and position control in industrial, robotics, automotive, automation and other applications. The control of systems with backlash has been the subject of study since the 1940s. This survey reveals that surprisingly few control innovations have been presented since the early path breaking papers that introduced the describing function analysis of systems with backlash. Promising developments are however taking place using adaptive and non-linear control strategies.     

Porosity of recycled concrete with substitution of recycled concrete aggregate: An experimental study

In this paper, we present the experimental analysis of samples of recycled concrete (RC) with replacement of natural aggregate (NA) by recycled aggregate originating from concrete (RCA). The results of the tests of mechanical properties of RC were used for comparison with tests of mercury intrusion porosimetry (MIP), in which the distribution of the theoretical pore radius, critical pore ratio, the surface area of the concrete, threshold ratio and average pore radius were studied at ages of 7, 28 and 90 days. The results showed some variation in the properties of the RC with respect to ordinary concrete. Porosity increases considerably when NA is replaced by RCA. Additionally, a reduction in the mechanical properties of the RC is seen compared with ordinary concrete when porosity increases.     

硅灰混凝土的研究及其在公路道面的应用

 了提高道路路面混凝土的抗磨能力，采用硅灰代替部分水泥的方法，对硅灰混凝土的性能进行了较系统的试验研究。成果表明其抗压强度、抗弯强度、抗磨强度等指标都得到明显提高，全面达到和超过了规范要求。并已在丹江口水利枢纽上坝公路中得到应用，实践证明硅灰混凝土技术可靠、经济合理、易于施工。特别是抗磨度的提高，对延长公路路面的使用寿命具有重要意义。     

微合金化高强度钢轧制采用的工艺技术

本文综述微合金化高强度钢轧制采用的工艺技术，其中包括热装热送、板坯加热、控轧控冷、快速冷却、采用的新设备等工艺技术。重点是生产低碳、高韧性、高强度、易焊接的造船用钢采用形变热处理技术，以提高产量和质量，节省昂贵的Ｎｉ、Ｃｒ、Ｍｏ等合金，降低生产成本。     

Ionic Strength Effects on Heat-induced Gelation of Myofibrils and Myosin from Fast- and Slow-twitch Rabbit Muscles

The effects of ionic strength on myofibrils and myosin from rabbit fast-twitch Psoas major (PM) and slow-twitch Semimembranosus proprius (SMp) muscles before and after heating were studied by electron microscopy and thermal scanning rheometry. The direct suspension of proteins in low ionic strength (0.2M KCl; pH 6.0) led to very weak gels, whereas a gradual lowering of the ionic strength (by dialysis against 0.2M KCl; pH 6.0) of 0.6M KCl protein solutions induced strand-type networks at low temperature and strong heat-induced gels. As shown by transmission and scanning electron micrographs, in low ionic strength, SMp myosins formed shorter filaments before heating and thinner and shorter structures in heat-induced gels, as well as a lower gel porosity than PM myosins.     

高强度烧结钢

为开拓粉末冶金材料新的应用领域，近年来对高强度烧结钢进行了大量的研究与开发。本文简要介绍Ｈｏｇａｎａｓ公司开发的一些高强粉末冶金材料及对一些高强度烧结材料尺寸变化的控制。     

Rene′95粉末合金喷丸强化研究

研究了Ｒｅｎｅ′９５热等静压粉末高温合金喷丸后的残余应力场、组织结构、致密度及其与疲劳性能的关系。结果指出，喷丸强化能够有效地提高合金高周和低周疲劳强度。     

自韧Si3N4陶瓷的显微结构及其性能研究

利用热压的方法制得室温断裂韧性和抗弯强度分别为１１．２ＭＰａ·ｍ￣（１／２）、８２３ＭＰａ，高温（１３５０℃）断裂韧性和抗弯强度分别为２３．９ＭＰａ·ｍ￣（１／２）、６３０ＭＰａ的自韧Ｓｉ＿３Ｎ＿４陶瓷。研究了显微结构和力学性能之间的关系。结果表明：玻璃相的含量、β－Ｓｉ＿３Ｎ＿４的长径比等对性能有重要影响。分析了自韧Ｓｉ＿３Ｎ＿４陶瓷的增韧机理，通过ＳＥＭ明显观察到Ｓｉ＿３Ｎ＿４中存在裂纹偏转、分支和β－Ｓｉ＿３Ｎ＿４拔出现象。