Abstract:Multifunctional structure technologies are considered as the ideal way to design a lighter and smaller
satellite and are becoming the focus of structure engineer爷s attention. The study and progress of MFS technologies are
summarized,and the future development of MFS is analyzed and prospected.

Abstract:Thermal interface materials (TIMs) are commonly used to reduce the thermal resistance between an
electronic device and its cooling solution. This paper summarizes the progress in the design,composition,properties and
application of TIMs in microelectronics. Finally,the developing trend of the technique is also pointed out.

Abstract:In this article, the progress of the drying technology at ambient pressure of silica aerogels and of theapplication of silica aerogel composite as the insulating material were reviewed. Several drying processes of silica aerogel such as improving the strength of gel network framework,adding chemical additives,surface modification,reducing
the capillary force and so on are summerized. In addition,the application of silica aerogels composites have been introduced as well.

Abstract:The absorbing mechanism of nano magnetic metals is analytically dicussed in this paper. And the recent research progress of nano magnetic metals including nanomagnetic particles of zero dimension,nanowire arrays of
one dimension, magnetic thin films of two dimension and flaky matel magnetic powders of two dimension at home and
abroad is reviewed. At last,the future research trends are introduced.

Abstract:This article presents to the readers a brief description of the principle of RTM and physical parameters
of advanced composite. Then two common derived RTM process: vacuum infusion molding process and flexible RTM are
discussed in detail. And, an outlook on two methods which are going to widen the use of RTM in aerospace field: lowering the viscosity of the resin and improving this technology, also put forward.

Abstract:Composite pressure vessels are widely used in many fields such as aerospace, automotive and electronics among others. The recent application of composite pressure vessels in the industry of aerospace is reviewed.
The Basic design and representative structure of composite pressure vessels are introduced systematically, and the development of composite pressure vessels is discussed

Abstract:On the basis of the formula of buckling load of C/ E composite trellis wound structure under the axial
force combined with external pressure,this paper calculates the load carrying capacity for the carbon epoxy composite
trellis wound structure. Through choosing non hole structure as objective function,we can obtain an optimum strengthe
ning design result. The result gives a good strengthening method to the typical area of the skin with the hole and solves
the engineer problem.

Abstract:This paper summarizes the advantages and the disadvantages of the carbon/ epoxy composites trellis
wound structure based on multiple experiences of design and production of the structure. In order to exert the advantage and overcome the disadvantage of the structure,the views and the flows of integration design are given. The details
of the flows are discussed. The analysis indicates that it can reduce the development cycle and the development cost so
that the carbon/ epoxy composites trellis wound structure can be widely applied in project.

Abstract:The effect of geometry on strength in aluminum adhesive joints is studied by using 3D elastic plastic
finite element method(FEM). The results show that:with adhesive thickness increasing,the strength first increases and
then decreases; the strength, which is not linear with the lap length but linear with the lap area,increases with the increasing of the lap length within a certain range. The strength can be increased with increasing lap width and decreasing lap length in the case of the same lap area. The strength decreases with the shorter distance between the clamps,
increases with the increasing of the adherend thickness,but the increase is not unlimited . This change tends to be slowl. When thickness reaches up to a certain extent.

Abstract:By using fiber random distribution model constructed by finite element code Ansys, the computing
and analysis of transient moisture distribution were carried out after moisture transports into the aramid fiber/ epoxy
resin composites exposed to relative humidity RH = 90% at t =80益condition. The difference between the computed
results and the material absorption experimental results was minimal with the maximum difference being 2. 7% of the
weight gain. Then the analysis was carried out to study the timevarying moisture stress on the basis of obtained transient moisture distribution. The results show that finite element analysis approach can accurately simulate transient moisture transport of composites. The level of moisture stress is very high after a long term moisture absorption in resin matrix (above 50 MPa),and the stress in the matrix region of fiber spacing is smaller and the interface between matrix
and fiber is higher than that in other regions. The highest stress occurs in the interface. This high level of stress may
lead to significant effects on damage and failure initiation in the cycle moisture and drying.

Abstract:This article studies the surface modification of PBO fiber by using the polymer coating method. The
impact of surface coating treatment liquor with different concentration and different impregnation process on interlaminar shear strength of the composite materials is investigated through NOL ring interlamminar shear strength test. The results show that the treatment of surface through coating method can increase composite interlaminar shear strength.When the PBO fiber surface after the treatment of twice impregnation process,the efficiency is most obvious. The interlaminar shear strength up to 61% higher than that of the fiber without surface treatment.

Abstract:Effect of twice step heat treatment on mechanical properties and microstructure of graphite fibers was
studied,and the skincore degree of graphite fibers was analysed by Raman spectroscopy. The results found that twicestep heat treatment contributed to increasing the tensile strength and volume density of graphite fibers,but showed lesseffect on tensile modulus of graphite fibers. From the results of Raman spectroscopy,we found that the surface graphitization degree was lower,the inner graphitization degree was higher and the skincore gene was larger by twice step heattreatment,which meant that graphite fiber was more homogeneous. Twice step heat treatment was good for inreasingcompactness and homogeneousness of graphitize fibers,which was the reason for tensile strength increasing

Abstract:Organic fiber 1,organic fiber 2,carbon fiber powder and nanoinorganic substance were added to HN
BR matrix respectively. By morphology analysis and Xray energy dispersive spectroscopy (EDS),the effect of different amount of different fillers on ablation performance and mechanical properties of HNBR was studied. It is foundthat HNBR with organic fiber 1 and nano inorganic substance possesses good ablation performance. HNBR with organic fiber 1 has poor mechanical properties,while nano inorganic substance have little impact on mechanical properties ofHNBR. HNBR with organic fiber 2 and carbon fiber powders has little impact on mechanical properties but unsatisfactory ablation performance.

Abstract:The TiO2 / TiN films were grown by multiarc plasma deposition on Al substrates. Through controlling
the roughness of the substrate material, the prepared films possessed nonspecular reflection effect in visible band.The films were analyzed and characterized by scanning electron microscopy, infrared radiation measurement instrument and the UV visible spectrum. The results show that visible camouflage films with low infrared emission and good binding force can be grown by multi arc plasma deposition on Al substrate. The results show also that the infrared emission tends to be stabilized at a value of about 0. 2, as the thickness of the oxide layer increased.

Abstract:The effect of vacuum electron irradiation on interlaminar shear strength and mass loss of carbon fiber/
cyanate ester composites was investigated by using space simulation equipment. XPS and SEM were used to characterize the composition and fracture micrograph of composites before and after electron irradiation. The results show thatvacuum electron irradiation of 150 keV has the influence on the surface of carbon fiber/ cyanate ester composites, andwith the increasing of irradiation fluence, the interlaminar shear strength of composites increases first, then decreases.The mass loss goes up quickly first, however, it tends to level off.

Abstract:The M40 fiber reinforced bisphenol A dicyanate ester(BADCy)composites with soft buffer layer of oxazoline ring were prepared by coating epoxy E51 on the surface of M40 fiber. FTIR, SEM and mechanical investigation shows that epoxy E51 reacts with cyclotrimerization and forms oxazoline ring, which has high impact strength andflexural strength. The buffer oxazoline ring between the M40 fiber and BADCy matrix can relax the interface stress emerging from difference of CTE between M40 fiber and BADCy matrix, thus resulting in the improvement of interlaminar properties of M40/ BADCy pomposities. When the concentration of the treating solution is 5wt %, the interlaminarshearing strength (ILSS) and flexural strength of M40/ BADCy composite rise from 68. 9 MPa and 1080 MPa to 78. 1MPa and 1 110 MPa, respectively.

Abstract:Excellent ZL114A/5A06 joints by laser welding were obtained after parameter optimization. The microstructure,tensile strength and tensile fracture were analyzed by means of optical microscopy(OM), tensile testingmachine,high temperature fatigue testing machine,scanning electron microscopy( SEM) and energy dispersive Xrayspectrometry(EDX). The results show that the microstructure of the central welding zone is equiaxed crystal. The average tensile strength of untreated welding joints can reach 265 MPa,which is more than eighty percent of that of basemetal,excellent fatigue resistance of the joints is also demonstrated. The fracture appears near the fusion line ofZL114A,and under the premise of full weld penetration,the lower laser power, the smaller crystal size and the highertensile strength. Aluminum alloy conduithead with stressedskin construction was successfully welded and can meetthe requirements.

Abstract:Through the experiments on cutting SiC wafer under the workpiece rotating,the surface microtopography ofslices was analyzed. The affecting laws including saw wire speed,workpiece feed speed and workpiece rotational speed onsurface roughness and tangential force of slice were studied. The results show that the wafer surface is flat and smooth andthere are no obvious bumps or grooves along the sawing direction due to additional rotation of the workpiece in this experiment condition. The surface roughness of slice reduces from Ra 1.532 m to Ra 0.513 m when the speed increases from 0r/ min to 12 r/ min. Thus the quality of slice surface is improved. The value of surface roughness and tangential force reduce
when wire saw speed and workpiece rotation speed increase and workpiece feed speed decreases. However, the value of surface roughness and tangential force will increase when wire saw speed and workpiece rotation speed excessively increase.

Abstract:Along with the development of exploration in deep sky research, the stylists pay mote attention to the influence of Lunar dust and Martian dust on spacecraft. In this paper, with the technique of quartz crystal microbalance(QCM), a research of measuring the space fine dust mass accumulation is introduced. A model of adhaesion coeficient betweenthe surface of the quartz crystal pole and the mass of dust particles was establisted. As a result, when the adhesion coeficient is k>m棕02, dust particles accumulation and the frequency of quartz crystal accord with Sauerbrey function. Based onthis theory,by spreading sticky film on the surface of the pole of QCM, fine dust particles mass accumulation can be measured.

Abstract:The microstructure,mechanical properties and hardness of TIG welded joints made by TA15 titanium
alloy with and without ultrasonic impact were analyzed and tensile fracture surfaces of the joint were observed. Meantime,the fracture of welding joint was investigated. The results show that,after welding,microstructure of the weld zone and the heat affected zone are different from the parent metal,showing characteristics of weave structure. Microstructure of the parent metal and the joint changed a littie after ultrasonic impact. The tensile strength and the elongation percentage of the parent metal and the weld zone increased slightly. Before and after ultrasonic impact,the property of the tensile fracture surfaces of the parent metal and the weld zone are dimple type fracture. After ultrasonic impact,
the surface microhardness and the section microhardness are obviously increased.

Abstract:The fatigue crack growth rate of inertia friction welded joints of TC17 titanium alloy was studied. The microstructure and the fracture surface were analyzed by means of optical microscopy and scanning electron microscopy. The results show that the microstructure of TC17 titanium alloy is +phase with bigger grain. The microstructure of weld zone and heat affected zone is tiny phase and clear phase grain boundary,the original grain of weld zone is smaller, the original grain of heat affected zone is bigger. At room temperature;when K15 MPa·m1/2,the fatigue crack growth rate of weld zone is smaller;when K15 MPa·m1/2,the fatigue crack growth rate of weld zone is the largest. The next is heat af fected zone, the growth rate of parent metal is the smallest. At high temperature,the fatigue crack growth rate of different parts of welded joints shows little difference,but all lower than those tested at room temperature.