复杂轮胎钢帘线双尺度结构分析

对全钢载重子午线轮胎钢丝帘线的精确变形和应力分布进行了数值研究。基于子午线轮胎整体建模理论,提出了帘线局部分层建模新方法。结果表明:高伸长率帘线在拉伸仿真中能清楚地观察到结构、弹性及弹塑性变形阶段,而高强度帘线的结构变形阶段不明显;拉弯组合仿真中,单丝均独立弯曲而非统一弯曲,最内层单丝中性轴偏移到压缩区,最外层单丝中性轴几乎仍位于几何对称轴,单丝之间接触面的增大极大地提高了单丝局部压力。最后,实验结果验证了有限元方法的正确性。

DEFPOS Hα observations of the W80 Complex

We present Hα emission line measurements of the W80 nebula complex. A total of 26 regions have been observed inside the nebula with the Dual Etalon Fabry- Perot Optical Spectrometer system at the f/48 Coud6 focus of the 150 cm RTT150 telescope located at TUBITAK National Observatory in Antalya, Turkey. The inten- sities, local standard of rest velocities, heliocentric radial velocities and linewidths for full width at half maximum of the Hα emission lines have been determined from these observations. They lie in the range of 259 to 1159 Rayleigh （R; 1R = 106/47r pho- tons cm-2 sr-1 S-1 = 2.41 × 10-7 erg cm-2 sr-1 S-1 at Ha）, 4 to 12 km s-1, -3 to -11 km s-1 and 44 to 55 km s-i, respectively. The radial velocity measurements show that there are several maxima and minima inside W80. The new results confirm findings in the literature that the complex seems to be rather uniform in terms of radial velocity and no turbulent motion is seen inside the complex. The average value of the calculated emission measure for the region is 3.1 pc cm-6.

应用发泡点分析仪分析胎面胶硫化过程中的温度不饱和度与热扩散系数

以载重子午线轮胎胎面胶为例,应用发泡点分析仪(BPA)测试和计算胶料温度不饱和度及扩散系数,探讨BPA的测试原理和方法。结果表明,热扩散系数与热源温度无关,而与加热时间和厚度相关。应用BPA对胶料进行硫化分析,有助于硫化工艺设计和生产控制。