The main mechanical properties in warp and weft direction of the hollow integrated core sandwich composites are obtained by edgewise tensile,edgewise compression,flatwise tensile,flatwise compression,double lap shear,and four point bending experiments.
对整体中空夹层复合材料经、纬向的侧拉、侧压、平拉、平压、双层剪切和4点弯曲等性能进行了实验研究,获得了该种材料的主要力学性能参数,并与类似的蜂窝夹层材料部分力学性能进行了对比。
Discussion of Weft Stop of Air-jet Loom;
喷气织机纬向停台问题的讨论
Reducing weft stop is an important way of improving efficiency of air-jet loom.
降低纬向停台是提高喷气织机效率的重要途径,通过对断纬、引纬受阻、引纬装置调节不当及引纬工艺参数配置不合理等因素引起的纬向停台,从原纱质量及生产工艺两方向进行研讨,并提出降低纬向停台、提高喷气织机效率的方法。
Warp stop and weft stop, especially the latter, are the main reasons that cause dropping efficiency of air-jet loom.
经纬向停台是导致喷气织机织造效率下降的主要原因,而纬向停台占的比例较高,因此,通过减少喷气织机纬向停台来提高织机效率具有重要意义。
The reasons which cause the defects have been analyzed,and afterwards,the measures to prevent and cure weft direction defects have been introduced from points of view of yarn property,loom condition and technique.
对用喷气织机织造弹力牛仔布常见的 4种纬向疵点的产生原因进行了分析 ,并介绍了自原料品质、织机状态到工艺设计等方面的合理防治措
This conclusion makes it clear that there is mathematic relationship between parameter ellipsoid and latitudinal density, and we have full reasons to do research on latitudinal density and latitudinal density anomaly.
这样就将不久前提出的“参数椭球”与“纬向密度”联系在了一起,使得水准椭球的纬向密度成为一种数学必然,为研究地球的纬向密度及纬向密度异常找到了充分的理由。