Applied Mechanics and Materials Vols. 543-547

Abstract: People are paying more and more attention on driving comfort of their vehicle. This subject also draws more and more attention from the manufacturer. For cost and fix space reason, light trucks cab can hardly be designed to be float-type. So, good match for cab-mount system are the only available method. This paper is focus on matching analysis of cab-mount system. From parameters calculation to matching analysis, this paper provided a full chain of this method, which has great value of reference.

Abstract: In engineering practices, aircraft structures have been damaged due to the structural corrosion, the corrosive problem of aircrafts needs to call high attentions for researchers because aircraft structures are composed of metals and compound metals. In this paper, corrosion problems and structural reliability of aircraft structures are discussed. Corrosion morphology and mechanism of aircraft structures are analyzed based on metal corrosion theory. The characteristics of the various types of corrosions of aircraft structures have been enumerated. The effect of environments in corrosion process of aircraft structures is studied. The law of corrosion developed at aircraft structural parts or materials is summarized. This research contributes to improving professionals capacity of corrosion prevention and control. It also provides technical support for aircraft maintainers.

Abstract: According to the overseas and domestic researches on green design and mass customization, this paper does research on green product configuration design method based on the three configuration algorithms, and proposes a new product configuration method aiming at realizing the goal of green design under mass customization (MC). By studying on green design method based on product configuration, strong support is provided for enterprises with green manufacturing both in theory and method.

Abstract: Hinge sleeve of cubic press is the key important equipment which is used in the field of processing and production of super-hard materials, and is always under super high pressure. So the problem of fatigue must be concerned. In this paper, the model of hinge sleeve of cubic press was established in ANSYS and UG. Fatigue of hinge sleeve in cubic press was analyzed by ANSYS. The results of calculation shows that the times of work period of hinge sleeve reaches 61550 under extreme load, satisfied the requirement of design.

Abstract: This paper takes a marine steam turbine control valve as the research object, studies the vibration response under pressure pulse excitation. First, the transient flow field analysis is made to obtain the time-domain information of the pressure pulsation; Followed by pressure pulsations fast Fourier transform into the frequency domain information, access to the load spectrum; Then modal analysis is studied to obtain the natural frequencies and mode shapes; Finally, based on the analysis of vibration modes, research vibration response and resonance problems of control valve. The study found that the vibration of control valve is strongly in low frequency excitation, but high-frequency excitation makes relatively little impacts on it; The diffuser and downstream of valve is the main area of generating vibration. Supported by the Fundamental Research Funds for the Central Universities (HEUCF140707).

Abstract: With worldwide developments stressing the security, economy, human well-beings and environmental costs of relying heavily on fossil and nuclear energy, the demand of safe renewable energy resources is expanding consistently and tremendously in recent years. With its safe and environmental characteristics, wind energy production has become one of the fastest growing renewable energy sources in the world. While new wind power capacity is being added in more places in various countries, the installation of wind turbines is an important process for long-term energy generation. In this study, an evaluation model, which incorporates multiple criteria decision making (MCDM) methods, including decision making trial and evaluation laboratory (DEMATEL) and fuzzy analytic network process (FANP), is developed to establish interactive relationships between criteria. Fuzzy Yager ranking method is used for deffuzification. The final ranking of the alternatives is obtained, and this can provide decision-makers for references.

Abstract: A methodology to design optimal forming process and relative parameters of the automobile front panel reinforcing plate, using the numerical simulation technology of forming sheet metal, is investigated. The digital model of the complex automobile part is established by computer aided design software. Dynaform software is used to simulate its forming process to acquire the feasible process parameters affecting its formability. Forming limit diagram and thickness distribution diagram are used to evaluate the simulation results of different process schemes. The orthogonal experiment method is adopted to design and simulate the process parameters to find out the optimum values for die design. The reasonable process design and optimum values of fillet radius of female die, friction coefficient and blank-holder force are obtained, which can reduce the tendencies of wrinkling, crackling and thickness reduction, and achieve sufficient plastic deformation of blank.

Abstract: In this paper, the computer simulation software Moldflow was used to analyse the characteristics of cooling, flowing, pressure maintaining, and warping in the process of injection filling for the tea ceremony electromagnetic oven baseplate, which could guide the optimization of machining process. Meanwhile, the development cycle of products would be greatly shortened and the cost would be reduced, which could produce significant economic benefits [1-5].

Abstract: The Variable Forward-Swept Wing (VFSW) Tailless configuration UAV can well satisfy multipurpose demands. However, this kind of unconventional morphing aircraft lacks tail, which brings great challenge to stability analysis. The connatural aero-elasticity divergence and the strong aerodynamic coupling as well as many uncertain factors in mechanical environment, give the VFSW Tailless configuration UAV complicated dynamic characteristics. During the process of transformation, the variation of dynamic shape will inevitably lead to the variation about aerodynamic center and barycentre positions of airplane, then make the angle of attack static stability margin variable, and directly influence stability of aircraft. On the basis of introduction of the VFSW Tailless configuration UAV, according to its geometric shape, positions of aerodynamic center and barycentre, in different states with different forward-swept angle, were calculated, so as to obtain variation curve of longitudinal static stability margin, which provided preferences for dynamics analysis, position of barycentre adjustment and design of flight control system (FCS).

Abstract: The influence of vehicle deformation on the risks of head injury for the drivers involved in frontal crashes is studied using real world crash data. There are three types of vehicle damage distribution considered in this paper, namely, wide distribution, moderate offset, and small offset. The adjusted odds ratios (OR) along with 95% confidence intervals (CI) for the head injuries are estimated by logistic regression, controlling for a wide variety of confounders. Results show that occupants' head injuries are highly related to damage distribution. Small offset crash has greatest threat to head injury. Seat belt is effective in all the crash types of concern. This study provides evidences to upgrade existing frontal crash test program and clue to countermeasure development for occupant protection in different crash modes.