Advanced Materials Research Vols. 418-420

Abstract: This paper analyzed the basic physical and chemical characteristics of methanol diesel blended fuel. The power and fuel economy performances were studied experimentally when methanol diesel blended fuel was supplied to JiChai 3012 diesel engine, without any changing of the configuration of this machine. The results show that compared to common diesel engine, the diesel engine using 10% and 20% methanol blended fuel show a slightly decrease in power, a less than 5% decrease in the dynamic performance, and an increase in fuel consumption; while the smoke is the reduced by 10% and 20% methanol blended in diesel.

Abstract: The application of grouting technology in the reinforcement and water shutoff of underground engineering is very extensive. The grouting technology mainly includes two aspects: grouting process and grouting material. The grouting material is a vital link in grouting. It affects the cost of construction directly, and determines the success or failure of the engineering. The smaller the molecular dimension of solution or solid particle dimension, the greater the scope that the grout can be injected into. And it is beneficial to the grouting effect. With the development of nanotechnology, the development of nanometer grouting materials is feasible, and is also a great breakthrough for the grouting technique.

Abstract: This paper gives an amended stiffness model of simple beam. Single-cylinder hydraulic machine upper beam as an example, amended stiffness model is established. Using orthogonal test method to determine the test program and carrying out finite element analysis to each test program. For the purpose of constructing the amended simply beam stiffness model, the overdetermined equations is established. By solving the overdetermined equation, the amended simply beam stiffness model is obtained. The error between the amended stiffness model results and the finite element analysis is less than 20%, so the amended model has certain validity.

Abstract: Using SBR and epoxy to modified warm-mix asphalt, the penetrability, ductility, softening point of bitumen at different aging times are tested, the comparative analysis of the modified effects of two modified agents to the asphalt mixture is made; Construction temperature of asphalt is determined by using temperature - porosity curve; The results reflect epoxy resin and SBR can improve the high temperature stability and anti moisture infringement capacity, so propose to use warm mix asphalt concrete for the top layer except in special sections layer.

Abstract: In this study, new conductive polymers were synthesized based on phenothiazine. Phenothiazine has a structure containing nitrogen and sulfur atoms, hetero atoms and is known to be a good material to transmit holes. However, its solubility is low and there is a difficulty when it is used as a transcription-type material. Hence, various alkyl groups were substituted in the nitrogen location of phenothiazine so that they could be used to synthesize polymers as monomers. Four types of compounds, Poly (10-n-butyl-phenothiazine) sulfide (PBPS), Poly (10-n-hexyl-phenothiazine) sulfide (PHPS), Poly (10-(2-ethylhexyl)-phenothiazine) sulfide (PEHPS), and Poly (10-n-decyl-phenothiazine) sulfide (PDPS) were synthesized and their yields were 57.4%, 80.2%, 45.2%, and 47.1%, respectively. Finally, UV-Vis, PL spectra, and cyclic voltammetry (CV) were measured to analyze the characteristics of conductive polymers.

Abstract: A composite structure multi-parameter sensor based on an embedded polarization maintaining fiber grating (PMFG) has been studied theoretically and experimentally. A fiber Bragg grating (FBG, for comparison with the PMFG) and a PMFG are embedded in glass fiber reinforced polymer (GFRP) laminates in the experiment. The temperature and stress response characteristics of the fiber gratings embedded in corresponding GFRP are studied. The temperature sensitivity of the FBG improves from 10.64pm/°C to 21.66pm/°C. The temperature sensitivity of the PMFG improves from 10.22m/°C to15.7pm/°C (x-axis) and from 9.56 pm/°C to15.1 pm/°C (y-axis). The peak wavelengths in the reflection spectra of the two gratings all shift linearly with the temperature and/or the stress of GFRP. The two temperature-wavelength sensitivities and the two stress-wavelength sensitivities of the PMFG are all different with each other. The temperature and the stress of the GFRP can be calculated according to the two peak wavelength (in x-axis and in y-axis) shifts of a PMFG. Therefore, one PMFG is component for monitoring the temperature and the stress of a composite structure simultaneously according to the experimental results.

Abstract: Two kinds of fiber materials, glass fiber and technical polyester filament were used to design six different kinds of woven spacer fabrics. Then in the space of the fabric the polyurethane foam was filled and on the surface of the fabric the epoxy resin was combined by means of handle paste shaping craft to build the composite panels. The flexure and compression performance of the composite panels were measured. The experimental results showed that the difference of the materials influenced the properties of compression and flexure to some extent.

Abstract: The Polysulfone Flat ultrafiltration membranes were prepared with dimethylacetamide (DMAc) as solvent and polyvinypyrrolidone (PVP) as pore forming additive. Performance of PSF membrane such as pure water flux, albumin egg rejection were investigated. In addition, the same investigations were conducted with different coagulation bath temperature and evaporation time. The results show that there were a maximum of pure water flux and a minimum of the retention of Albumin when PVP content reach 14%.

Abstract: In order to discuss the effect of content of primary α on properties of bimodal microstructure, the TC4 sheet in rolling state was heat treated at different temperatures of 10~50°Cbelow the β-transus temperature, then a series of bimodal microstructures with different content of primary α were obtained by air-cooled procedure. Quasi-static and dynamic compress tests were carried out with universal material testing machine and Split Hopkinson Pressure Bar (SHPB) respectively. The results indicated that the relationship between mechanical properties and primary α is irregular, and that bimodal microstructure with 25% primary α shows a better combination of strength and ductility.

Abstract: The analysis of windshield against bird strike is necessary for reducing the disastrous consequences. The flat windshield which involves two pieces of glass together with a polyurethane interlayer is often used in the aircraft. The mechanical property of the polyurethane interlayer is an important factor of affecting the response of windshield against bird strike. This effect is investigated in this work by simulating the bird impacting the flat windshields with the polyurethane of different elastic modulus. The bird is modeled with SPH method. The calculation results indicate that the elastic modulus of polyurethane affect the response of windshields in many points. For the elastic modulus of 5 MPa, the thickness of polyurethane interlayer is compressed by 16% during the striking. The compressive effects decrease the contact force and the displacement of windshield to some extent. Especially, the major principle stresses in the inner and outer glass are decreased by the compressive effects significantly. It is found that the major principle stresses in the outer glass are 103 MPa lower than those of the case with the elastic modulus of 600 MPa. The relatively small stress in the glass means that the windshield can afford more serious impact and has the better impact resistance.