Papers by Author: Peng Fei Wang

Abstract: An analysis feature-based CAD-CAE integrated approach was proposed to solve the problems of rapidly CAE modeling for static and dynamic analysis process of machine tool. Firstly, analysis features were defined in CAD system and analysis feature library was constructed for machine tool and its structural components. Secondly, analysis feature model was constructed by attaching analysis feature to CAD model interactively. Finally, ANSYS parametric design language (APDL) file was generated automatically by mapping analysis features to APDL codes, which realized the integration of CAD system and ANSYS system. Based on application programming interface (API) of SolidWorks, a parametric CAD-CAE tool oriented to static and dynamic analysis of machine tool was developed, which realized parametric modeling and automatic analysis of machine tool and improved design efficiency and quality of machine tool.

Abstract: Diamond polycrystalline composites with some different elements were prepared by HPHT (high pressure and high temperature). The dependence between emission energy and excitation energy was characterized by PL technique. The results showed that the photoluminescence of diamond polycrystalline composites was not affected by additives, only related to the excitation. The emission wavelengths of composites decreased with excitation, at the same time, emission peaks shifted to high energy region and the peak width at half-height decreased relatively. The energy of emission had a linear relationship with that of excitation. The emission band peak location shifted from 1.57 (790nm) to 1.97eV (628nm) as the excitation wavelength changed from 2.34 (530nm) to 2.95eV (420nm). Emission intensity decreased linearly with the decrease of excitation energy intensity. However, this linear dependence disappeared as excitation wavelength was below 400nm.

Abstract: Zn and Cu were separately incorporated to the diamond powder and then the compacts were prepared under 5GPa, 1273K. The results showed that Zn was a good additive to prepare polycrystalline diamond by high-pressure and high-temperature (HPHT) because it could inhibit the graphitization of diamond. The element Zn left in the polycrystalline was in the form of ZnO. The photoluminescence spectroscopy showed that there were a series of sharp bands between 310 and 390nm when the excitation was above 200nm. However, the full width at half maximum of the diamond peaks mostly was below 0.5nm. The intensity of sharp band decreased with the decrease of excitation energy and then disappeared at last.