Applied Mechanics and Materials Vols. 37-38

Abstract: Tool edge geometry has obvious influences on cutting tool behaviors. FEM modeling and simulation of orthogonal cutting process using uniform and variable edge cutting tools were studied with dynamics explicit ALE method. AISI 1045 steel was chosen for workpiece, and cemented carbide was chosen for cutting tool. Three sections of uniform and variable edges were chosen for analysis. Cutting forces and temperature distributions were calculated for uniform and variable edge carbide cutting tool. Simulation results show that variable edge cutting tool obtains small cutting forces. Ploughing force tends to reduce when variable edge cutting tool was used. Variable edge cutting tool reduces the heat generation and presents reasonable temperature distributions, which is beneficial to cutting life. The force and temperature distributions demonstrate the advantages of variable edge cutting tool.

Abstract: This paper used Finite Element Method to investigate the influence of the circular face-core debonding dimension on the further debond propagation under the pure bending load in honeycomb structure. We also summarized the debonding rules and looked further into debonding area effect on the critical load for debond propagation. The conclusions are as follows: For a honeycomb panel, there exists a certain debonded radius . When the initial debonded radius is greater than , it will experience local buckling which takes the form of snap-through buckling. The debonding propagation is only discovered on the wide direction of the plate. The critical load for debonding propagation decreases with increased debond size.

Abstract: As the consumer market in the optics, electronics and aerospace industries grows, the demand of ultra-precision aspheric surface increases. The shape accuracy of the optical lens changes significantly with deformation conditions and optical properties of the lens varies with stress distribution within the lens. Therefore, determining the deflection and stress of glass lens is very important to improve the quality of the lens. In this paper, the deflection and stress theoretical results of BK7 glass plate have been presented in different cases of elastic deformation processing. The results are compared with the finite element analysis (FEA) to demonstrate the robustness and accuracy of algorithm in calculation of stress and deflection. The mentioned finite element models were established using the software Abaqus/CAE. The analytical and FEA results showed that if the edge of plate is simply supported, the maximum deflection is 4 times larger than in the fixed edge case. Otherwise if the edge and centre point of plate is simply supported, the maximum deflection is 2.5 times lower than in the fixed edge case and 11.3 times lower than in the simply supported at edge case.

Abstract: In order to improve the ride performance of the wheel-tracked exploration robot, the suspension structure characteristics of wheel-tracked exploration robot have been analyzed, and the vibration model of the robot has subsequently been established. The stiffness coefficients and damp coefficients of the suspension system have been optimized, and the best mach program has been obtained. The study not only implements the optimization design of the suspension system, but also provides reference to other similar design problems.

Abstract: Based on electric pallet truck skids in the process of moving because of low road attachment coefficient, this paper proposed an anti-skid method by changing the proportion of enduring pressure between the driving wheel and trundles. Anti-skid control theory of the new method is researched and mathematical models of the main modules are established. Anti-skid control system is simulated by using AMESim and Matlab / Simulink software. Simulation results show that, this hydraulic anti-skid system can respond quickly and precisely.

Abstract: In this study, a computational analysis of the distribution of oxynitride concentrations in a tunnel is carried out by using the one-dimentional numerical method for a train-induced unsteady flow. The discretized equations are solved using the finite volume method. The results show that the calculated value and measured one is compatible basically. It can provide a theoretical basis and new idea for design.

Abstract: Social innovation is an emerging perspective of radical innovation transiting our society towards sustainability. Design, dealing with innovation issues, is supposed to play an important role in promoting it. Two workshops in Italy and China are organized as a pilot exploration with inter-cultural perspectives in service design for grassroots social innovations. Results show that service design can be a viable approach to intervene social innovations. Service design experiences are concluded in terms of local context, problem definition, targeting group and new business mode.

Abstract: Although Chinese industrial design has developed for over 30 years, the combination of design principles and practice could not meet the challenges of the new era. Design management could be used in reconstructing the core competence of Chinese enterprises. An atmosphere of effective communication and respect for each other is useful in achieving design objective. Design-appraising system will be eventually established by integrating design theory with practice.

Abstract: A new prototype of 2-DOF micro-positional stage was designed based on parallel structure according to the following requirements of the stage, such as, symmetrical structures in X and Y directions, decoupling movement in X and Y directions, large operating surface, and more simple and compact structure. Using double flexible arched plate, the specified structure of the stage was designed by considering the realization of its movement. Static and dynamic characteristics of the stage have been analyzed by using the finite element method. For the static performance, there is a linear relationship between the displacement of the stage and its driving force. The maximum displacement of the stage is about 36 μm under the maximum force 650 N. For dynamic performance, the natural frequency and the response time of the stage are about 2.4 kHz and 1.4 ms, respectively.

Abstract: Performance evaluation for knowledge management in organization is an important task under enterprise management. This paper designed a knowledge-based self-assessment system model based on Criteria for Performance Excellent framework established by National Institute of Standards and Technology (NIST). Firstly, the base framework and self-assessment scoring guidelines were introduced and explained. The paper also did requirement analysis for the system and explained the system function in details. Lastly, system process model and flowchart of primary function was designed.