The effect of the strain gradient on the onset of adiabatic shear instability in gradient - dependent particle reinforced metal matrix composites is investigated by using of linear perturbation analysis in this paper . the analytical results demonstrate that high strain gradient produced by the reinforcing particle will provide a strong a deriving force for the onset of adiabatic shear instability in mmcp 结果表明：增强颗粒的加入，改变了基体材料的微结构，并在基体中诱导了高的应变梯度，而这种高的应变梯度为mmcp的失稳提供了强大的驱动力，使其更易发生绝热剪切变形局部化失稳。
In this paper , a new two - dimension interface load - transfer model was developed after careful analysis of the one - dimension models mentioned above , the i nfluence of material properties on the load - transfer ability of the interface was taken into account . especially the property of the matrix have important influence on the ability of the load transfer ability of the interface , and it could well describe the bond phenomenon of the interface 本文经过仔细地分析cox的一维界面载荷传递模型之后，提出了一个新的二维界面载荷传递模型，考虑了材料性能参数对界面载荷传递能力的影响，特别是基体材料的性能对界面载荷传递能力的影响最大，能够较好的描述界面粘结现象。
In cvd support method , carbon nanotubes were prepared with the supported fe catalyst on the regular mesoporous molecular sieve mcm - 41 by catalytic pyrolysis of c2h2 . the author studied systematically the effect of different react conditions on the structure , property and thermal - stability of mcm - 41 , and reached an optimum condition of prepared mcm - 41 , whose mesoporous diameter was about 2 . 9nm , with 0 . 12 c16tmabr : 1teos : 0 . 24naoh : 66 . 7h2o under hydro - thermal condition Cvd基体法制备碳纳米管中，首先探索了不同反应条件对mcm - 41材料结构性能和热稳定性的影响，优化工艺参数，结果发现水热条件下反应物的摩尔配比为0 . 12c16tmabr ： 1teos ： 0 . 24naoh : 66 . 7h2o时制得的mcm - 41材料最适合用来作为催化剂基体材料，其孔径大小为2 . 9nm左右。
Polarization microscope had observed that the size of sphere crystal of pp after adding organic rigid particles became smaller , the excellent compatibility of interphase between matrix and organic rigid particles in composite has been proved , and the organic rigid particles were drew out into cavities from matrix in the photograph of the impact breaking section by sem . the reason of enhanced toughness of the composite is that the material absorbed amount of energy at forming cavities , which is the mechanism of the pp composite toughened with the organic rigid particles 偏光显微镜显示加入有机刚性粒子可使pp的球晶尺寸减小， sem观察到复合材料中基体材料和刚性粒子的界面相容性较好，在冲击破坏的材料断面上，刚性粒子明显被拔出形成“空穴” ，这些微小空穴较易产生而吸收能量，从而提高了材料的断裂韧性，这是刚性粒子复合聚丙烯的增韧机理。
Smart materials and structure have definite requirements of sensor components and driving components , for example , they can adhere well to the matrix and have higher strength , fatigue strength , more broad scope of frequency response and faster response speed , etc . piezodielectric ceramics have characteristic of easily preparing , heat - resistance , wet - resistance , high strength and broad scope of frequency response , etc . furthermore , it has piezoelectric effect and inverse piezoelectric effect , namely it can produce electric potential energy when it is transformed by mechanical strength and its mechanical dimension can be transformed when voltage is put on it 压电陶瓷能与基体材料很好结合,具有制备容易、耐热、耐湿、强度高、频响宽等特点,另外它具有正压电效应和逆压电效应,即当它受到机械力变形时,能产生电势,对它施加电压时,能改变其机械尺寸,因此它在智能材料结构中既能用作传感元件又能用作驱动元件。
The early studies are mostly focused on the method of gluing piezoceramics on structural surfaces , which has some disadvantages such as difficulties to protect the ceramics and the connection wires , bad coupling with only one surface glued on the base materials , low signal - to - noise ratio etc . these problems can be solved using the embedded piezoceramics , and furthermore , the piezoceramics can be placed in the optimal positions , especially in the optimal deepness for the piezo - actuators , according to an optimization algorithm befor e they are embedded , so the actuator effects and sensor signals are thereby enhanced 早期的研究主要集中在表面粘贴压电片的结构，表面粘贴压电片具有一些无法克服的缺点。本文着重进行利用埋入复合材料结构的压电传感器和压电驱动器对其振动进行主动控制的相关理论和实验研究，并介绍其相应结果。埋入型压电材料的优点主要是能保护压电传感器和作动器及其连线、增强压电材料和基体材料的耦合、优化埋入压电陶瓷的深度和厚度可增强压电传感器的测量信号并提高信噪比等。
At the same time i also did many primary experments on separator and these polymer membrane can be used in as soft packaging li - ion battery ’ s separator . used polyvinylidene fluoride ( pvdf ) as the basic material , added cotton fibre and starch in , cooked with 100 in boiling water afer 3 hours , the starch inflate , and then acquire porous polymer membrane . in the process of coating polyester film , copper foil and aluminum boil were used to as carrier , 选用的基体材料为pvdf ,同时向其中添加棉纤维和淀粉,最后利用100沸水对隔膜进行3小时蒸煮处理使淀粉溶胀,从而达到造孔的目的。在涂布工艺的筛选中,通过对麦腊片、铜箔、铝箔进行筛选,最后选定以铜箔为载体来进行涂布处理。当以铜箔为载体时,可以使隔膜正反两面物理性质达到基本一致。
This article is about the polymer separator full of holes , we research the performance of the separator , including making two kinds separters that produce wth complete different methods : spreading the separator , pvdf as the basic material , dbp as the plasticizing agent , nm sio2 as the inorganic addition and acetone as the solvent , and make separator on the special machine ; dipping in the separator so that intensify the seprater , its dip liquor is as the liqure as the spreading separator , and dip the base material pp / pe / pp into the liquor for more than 2 hours 本文对多孔聚合物电解质隔膜进行了综合研究。以聚偏氟乙烯( pvdf )为基体,邻苯二甲酸二丁酯( dbp )为增塑剂,纳米sio2为无机添加剂,丙酮为溶剂,在流延机上涂布得到了聚合物电解质隔膜。以流延法制备隔膜的浆料为处理液,将基体材料pp / pe / pp浸泡在处理液中2h以上,制备出强化电解质隔膜。
The one - dimension model has the advantages of simplicity , convenience and feasibility , but it also has one serious shortcoming , i . e . , the influence of material properties on the load - transfer ability of the interface was not taken into account . although the two - dimension interface model considered the transverse effects of the matrix and the effects of the material properties on the load transfer ability of the interface , its principle is very complicated , and is n ' t fit for dealing with the data of the sfc test Cox的一维界面载荷传递模型的主要特点是简单、方便和实用，但是具有一个致命的缺点：没有考虑材料性能参数对界面载荷传递能力的影响； nairn的二维界面载荷传递模型虽然考虑了基体的横向效应、纤维基体材料性能参数对界面载荷传递能力的影响，但是其原理非常复杂，不适合于单纤维复合材料断裂实验的数据处理。
Fiber reinforced plastic rebar ( frp ) is a new composite , which is composed of fiber acting as reinforced material , synthetic resin acting as matrix , and some adequate auxiliaries , and is formed through a pultrusion process and necessary surface process . it has a high strength to weight ratio , excellent non - corrosive characteristic , fatigue - resistant characteristic , strong designability and magnetic neutrality , so it can be used in the applications with special performance requirements or where reinforcing bars are subjected to severe chemical attack 纤维增强塑料筋是以纤维为增强材料，以合成树脂为基体材料，并掺入适量辅助剂，经拉挤成型技术和必要的表面处理所形成的一种新型复合材料，具有比强度高、耐腐蚀性能好、可设计性强、抗疲劳性能好、耐电磁等独特优点。
