3D simulation of image-defined complex internal features using the numerical manifold methodScience China Technological Sciences - - Trang 1-17
Wu, Jie, Ma, GuoWei
The numerical simulation of internal features, such as inclusions and voids, is important to analyze their impact on the performance of composite materials. However, the complex geometries of internal features and the induced continuous-discontinuous (C-D) deformation fields are challenges to their numerical simulation. In this study, a 3D approach using a simple mesh to simulate irregular interna...... hiện toàn bộ
Numerical simulation of rotor-airframe aerodynamic interaction based on unstructured dynamic overset gridsScience China Technological Sciences - Tập 55 - Trang 2798-2807 - 2012
HeYong Xu, ZhengYin Ye
A method of unstructured dynamic overset grids is developed for the numerical simulation of helicopter unsteady rotor-airframe aerodynamic interaction. For the effective treatment of the relative motion between the rotor and the airframe, the domain of flowfield is divided into two overset subzones, namely, a rotational subzone containing the blades and a stationary subzone containing the airframe...... hiện toàn bộ
Hot-exciton effects on exciton diffusion and circular polarization dynamics in a single PbI2 nanoflakeScience China Technological Sciences - - 2023
ChenYu Xu, Lei Wang, Lin Cui, BingRong Gao, HaiYu Wang
As one of the emerging two-dimensional lead halide materials, lead iodide (PbI2) nanosheets have proven to possess strong application potential in the fields of high-energy radiation detection and highly efficient perovskite solar cells. However, the underlying photophysical properties such as hot-exciton-related carrier dynamics remain unclear for PbI2 nanosheets. Here, we report the exciton dyna...... hiện toàn bộ
Hull deformation measurement for spacecraft TT&C ship by PhotogrammetryScience China Technological Sciences - Tập 58 - Trang 1339-1347 - 2015
HaiBo Liu, Cong Sun, YueQiang Zhang, XinMing Liu, JinBo Liu, XiaoHu Zhang, QiFeng Yu
When voyaging, ships are subject to inevitable hull deformations caused by the changes in the environmental temperature and external stress. These are a crucial source of errors when measuring data using a spacecraft tracking, telemetry, and control (TT&C) ship. A prototype system based on photogrammetry was developed for the real-time measurement of a spacecraft TT&C ship’s hull deformation. This...... hiện toàn bộ
Analytical investigation on thermal-induced warpage behavior of ultrathin chip-on-flex (UTCOF) assemblyScience China Technological Sciences - Tập 59 - Trang 1646-1655 - 2016
JianKui Chen, ZhouLong Xu, YongAn Huang, YongQing Duan, ZhouPing Yin
The serious warpage issues of ultrathin chip-on-flex (UTCOF) assembly induced by mismatched thermal stresses have greatly affected the mechanical stability and reliability of emerging ultrathin chip packaging technology. Currently, a theoretical prediction as a convenient and straightforward approach is still lacked for describing effectively the thermal-mechanical behavior of UTCOF during the adh...... hiện toàn bộ
Construction of Fe/Ag galvanic couple by mechanochemical in-situ reduced Ag to accelerate the degradation of Fe-based implantScience China Technological Sciences - Tập 66 - Trang 2824-2836 - 2023
WenJing Yang, Hao Song, ZhengYu Zhao, CiJun Shuai, Hao Pan
Orthopedic applications of Fe have been hindered by the insufficient degradation rate. Alloying with noble elements (such as Ag, Au, and Pt) to generate galvanic couples is a feasible approach. However, the direct preparation of homogenous alloys by mechanical alloying or metallurgy is difficult because of the differences in strength, density, and toughness. In this study, Ag2O was selected as the...... hiện toàn bộ