旋转体系中空载弹簧的应力分析

本文对旋转体系中空载弹簧的应力作了分析和探讨，并通过实验加以验证。     

旋转体系中负载弹簧的应力分析

在旋转体系中空载弹簧的应力分析基础上 ,本文进一步分析了负载弹簧的应力分布并提出了标志角的概念     

SIMS STUDY OF OXYGEN SPIRAL DIFFUSION C-TEXTURED Yba2Cu3O7-δ/SrTiO3 EPITAXIAL THIN FILM

Secondary ion mass spectroscopy was used to study the chemical diffusivity of 0¹⁸ in c-textured YBa₂Cu₃O_7-δ/SrTiO₃ epitaxial thin film. By fitting experimental data to the one- dimensional diffusion curve, the apparent diffusivity along the c-axis was obtained to be equal to l.02×10¹⁴cm²/sec when the temperature was 350℃. A computer analysis method was put forward to calculate the "spiral diffusion" process, and the diffusivity anisotopy of films with different mosaic size obtained. For a film of 7000×7000?² mosaic size, Dab was found to be ～3.55×10^-5xexp((-1.03 ev)/kT) cm²/sec. The calculated results reveal that the variation of the results of Dc is not the result of diffusivity anisotropy but of the difference in mosaic size.