Abstract:Impact test method,damage mode of impact with low velocity, damage failure detection method of
carbon fiber reinforced epoxy laminates are described,research advances in residual strength and fatigue properties af
ter impact and finite element numerical simulation are also summarized. Further studies of the impact of composite
materials are prospected.

Abstract:The harmfulness of electromagnetic radiation and the principle of electromagnetic shielding are introduced in this paper. Influence factor such as the kind, shape, content, combination, distribution and dispersion of
the fillers on shielding effect are reviewed for filling type electromagnetic shielding composite.

Abstract:The main properties of aerogel are reviewed, and the thermal stabilities of silica, zirconia, alumina,
and silicon oxycarbides aerogels are summarized. The prospective development of high temperature aerogel thermal in
sulation is discussed.

Abstract:The EPDM insulators ablating processes and some models for the solid ducted rocket motor are intro
duced simply and the main thermochemistry reactions on the insulator爷s surface and ablation products are analyzed based
on the omitting of particle collision and mechanical impact. Approximating prediction of charring layer ablating was presen
ted and the preliminary exploring of the thermochemical ablation mechanism of EPDM insulator was conducted.

Abstract:This paper focuses our attentions on the TBCs assembled by spraying techniques. On the basis of un
derstanding of failure mechanism of TBCs, the progress in the research on the TBCs assembled by plasma spray and
cold spray techniques is reviewed in detail.

Abstract:This paper calculated load carrying of isogrid and orthogrid of carbon epoxy composite trellis wound
structure (C/ E CTWS) using non linear finite element method. Based on the analysis, test cases were designed and
tests of axial compression were carried. Analysis result and test result fit well. In order to be used in the project, this
kind of structure cut out repairing was calculated. The method presented in this paper has been proved and can be used
to solve complicated engineering problems. According to calculations and experimental results combined with applica
tion, a principle of choosing wound structure is obtained and principle could be applied to engineering.

Abstract:A novel path generation algorithm for fiber placement is presented based on the generalized helical line
on canal surface. Here the problem of path planning on the mould surface is transformed into the solution on generalized
helical line. With this algorithm, the accurate generalized helical line is obtained by numerically solving the initialval
ue problems for a system of first order ordinary differential equations. The new algorithm can be solved by ODE45 func
tion of powerful Matlab based on adaptive 45 order Runge-Kutta algorithm. So the constructed fiber placement path has
control mechanism for absolute and relative error. The practical examples indicate that this algorithm is easy to operate
and the precision requirements of automatic fiber placement are easily satisfied.

Abstract:This paper presents a new assembly design process of components: assembly features of the assembly
base will be made automatically by the program instead of designers. The rapid assembly is implemented and applied
to a system of composite materials tooling design successfully.

Abstract:On the basis of the established 3D unit cell model of 3 dimensional (3D) five directional braided
composites, a tensile strength numerical model was proposed via 3D finite element analysis (FEA) compared with Iso
strain assumption and maximum stress failure criteria. The predictive strength was in good agreement with available
experimental data, which demonstrated the applicability of the presented model. The numerical results show that the
main failure modes of 3D five directional braided composites are tension of the axial yarn, which are consistent rele
vant with experimental results.

Abstract:

The TiC/ Ti5Si3 composites were synthesized by high energy milling and hot pressing with Ti, Si and
C powders as raw materials. The effect of processing conditions,especially hot pressing temperature,on the phase com
position and microstructure of the synthesized product was studied. Meanwhile,the thermodynamic was examined by
DSC,XRD and SEM. The results show that high purity TiC/ Ti5Si3 were successfully obtained by high energy milling for
12 h and hot pressing at 1 400 for 6 h. The synthesizing process was as follows:at first,Ti+C TiC, △G = -
167.72 kJ/ mol,then,5TiC+8Si →Ti5Si3 +5SiC, △G =-62.12 kJ/ mol,finally,3SiC+8Ti →Ti5Si3 +3TiC, △G =-
697.8 kJ/ mol. Microstructure shows that the synthesizing process of TiC/ Ti5Si3 composites go with the Si melted,the
materials are combined in the form of TiC-Si-Ti5Si3,and Si is binder.

Abstract:The tensile tests under superplastic temperature of BTi-62421S titanium alloy were carried out. Me
chanical property, metallurgical structure and morphology of failure surface were investigated to determine the fracture
mechanism and the optimum parameter of superplastic forming. Based on these researches, a BTi-62421S titanium
alloy frame was superplasticly formed. The results show BTi-62421S titanium alloy has the optimal superplastic per
formance with an extensibility of 448. 5% when deformed at the temperature of 920 ℃and the strain rate of 1伊10- 3 /
s. The gliding fracture is the main mode during the fracture procedure, accompanied with the character of brittle frac
ture on some conditions. A BTi-62421S titanium alloy frame satisfying the operating requirement can be formed suc
cessfully at the optimal superplastic condition.

Abstract:The expanded graphite was prepared through microwave expanding method and the nanographite
sheets were prepared through ultrasonic treatment and decoration technology. The microstructure of expanded graphite
and nanographite sheets were characterized by means of SEM, XRD and FTIR. Meanwhile, the application of
nanographite sheets in EPDM/ Graphite nanocomposites were introduced. The results showed that EG aremade from a
lot of graphite sheets with 100 to 300 nm thickness and formed a kind of net structure. By means of ultrasonic treat
ment, graphite is exfoliated and became many nanographite sheets with 30 to 60 nm thickness, meanwhile, the active
groups are led into the surface of nanographite sheets. The application effect of nanographite sheets in EPDM/ Graphite
nanocomposites are good.

Abstract:Carbon/ carbon composites were prepared by densifying through pregnation carbonization and graphiti
zation technology. The effect of volume fraction of pre oxidized fiber web on the mechanical performance of carbon/
carbon composites was studied by means of measuring the tensile strength,compression strength,flexural strength,
shear strength,and fracture morphology of sample was observed by using scanning electron microscope. The results
show that the mechanical performance in z direction (except compression strength) is increasing monotonously with in
crease of volume fraction of pre oxidized fiber web, and the mechanical performance in xy direction is little influenced
by volume fraction of pre oxidized fiber web. It is also found that the mechanical performance in z direction is closely
related to the amount and distribution of the fiber in z direction.

Abstract:The temperature of oxidation modification of carbon aerogels by using nitric acid and the influence of
the oxidation temperature on its structure and property was studied in order to obtain the carbon aerogels with good dis
persion and electric conductivity. Carbon aerogels before and after oxidation treatment were characterized by the FTIR,
XPS,Zeta potential, XRD and N2 isothermal adsorption desorption techniques. It was found that the dispersion stabili
ty of the carbon aerogels was closely associated with the oxygen containing functional groups on the surface. For com
parison,conductivity of carbon aerogels was well kept after oxidation treatment by HNO3 at low temperature rather than
that at high temperature (40℃, 87. 7% vs. 100℃, 2. 5%), which was attributed to the higher number of micro
pores formed at high temperature.

Abstract:A new method called sol-gel method was studied to add refractory metals into C/ C composites. Zir
conium acetate sol was used to infuse C/ C composites whose densities were 1. 39 and 1. 59 g/ cm3 respectively. The
effect of weight gain was apparently, and finally, the densities of C/ C composites reached 1. 88 and 1. 86g/ cm3. With
the use of back scattered electron, we studied the distribution of zirconium in the C/ C composites, finding that a zir
conium coating layer was formed on the surface of the material. But inside the material, the distribution of zirconium
mainly depended on the distribution of holes with in the material itself. After the testing of wind tunnel ablation on the
Zr-containing C/ C composites, a uniform ZrO2 film was found on the surface of material, which can cut off osculation
of oxygen and C/ C composites, and reduce the ablation rate of materials.

Abstract:ZrB2 doped into the matrix of carbon-based composite materials was investigated. Modified carbon-
based composite materials were prepared through hot-pressing molding and carbonation treatment. After static oxida
tion experiment at 1 500益,the sample with ZrB2 showed a better anti-oxidation performance. SEM observation results
showed that the samples surface formed dense oxidation layer, which inhibited the oxygen from diffusing into the ma
trix. Moreover, the chemical reaction mechanism in the high temperature oxidation process of composite material was
studied through the thermodynamic calculation.

Abstract:Polyacrylonitrile based carbon cluster like composite materials were prepared by physical and chemical methods. The morphology and surface phases of polyacrylonitrile based carbon cluster like composite materials
were examined by SEM and XRD. The absorbents filled with carbon cluster like composite materials and carbon clus
ter like materials were prepared, respectively, and their micorwave absorption was measured over the frequency range
of 8 to 18 GHz. The results indicate that the absorption band of the absorbents filled with carbon cluster like composite
materials is more than that of the absorbents filled with carbon cluster like materials. Polyacrylonitrile based carbon
cluster like composite materials have the electric and magnetic loss ability.

Abstract:We have developed new polymeric systems based on the ternary mixture of typical benzoxazine mono
mers with a typical modification bismaleimide and epoxy resin. Non-isothermal differential scanning calorimetry (DSC)
was used to follow the curing reaction. The analyses showed that there are a exothermic reaction peak from 164℃ to
306℃ for the modification benzoxazine/ bismaleimide/ epoxy resin system and top of the peak is 240℃,which con
firmed main reaction of modification benzoxazine/ bismaleimide/ epoxy resin system. The curing process temperatures
such as gelation temperature (Tgel)= 151℃, curing temperature (Tp)= 224℃ and postcuring (Ttreat )= 295℃ were
acquired. The reaction energy of the modification benzoxazine/ bismaleimide/ epoxy resin system was 89. 5 kJ/ mol and
the reaction level is 0. 93 by using Kissinger and Crane equation. The cure kinetic model of the curing process based
on n order reaction equation was established,which was used for simulation of the curing reaction characteristics. Cu
ring technics is 180℃/1 h+200℃/2 h+230℃/2 h,post curing technics is 250℃/2 h.

Abstract:As the Mist jetting electric discharge milling is lack of discharging stability, an ultrasonic atomizer,
which generates micro fog drops, is applied on the machining. And with supersonic vibrator, which offers vibration to
work piece,a better performance can be obtained. Experiments on electric discharge milling with mist generated by
tap water and deionized water were conducted. The results showed that the micro fog drops attained by ultrasonic at
omizer could effectively reduce the short circuit rate. Further, the experiments also illustrated that mist jetting from
external side could further improve the stability of the milling and achieve a better performance.

Abstract:In this paper,one parameter called "equivalent thermal resistance" was raised to reflect insulation of
flexible thermal protection structure, and experiments were conducted to analyze the law between this parameter and
aerodynamic pressure on the surface of flexible thermal protection structure. The insulation property of flexible thermal
protection structure non linearly declines as aerodynamic pressure rises. So the effect of aerodynamic pressure on insu
lation property of flexible thermal protection structure should be taken into account in designing.

Abstract:The theory of complex permittivity measurement of dielectric with circular cavity is described,a new
method of TM0n0 circular cavity design is reported,we designed the measuring system,compared with other cavity and
measurement of some kinds of dielectric. We can see many disturbing modes disappear in the cavity. This system has a
low measuring error and, makes the measurement more precise.

Abstract:This article analyse the reason why micro-crack and lead loosing appeared on CC4L high frequency
maltilayer ceramic capacitor during the manufacture process of the capacitor and tinning with handwork and other way.
The results of five groups tests indicate that the cracks were caused by high temperature,long tinning time and unapt
force to the lead. At last,the main operating method is pointed out to prevent the cracks.