LaNi_(5-x)Al_x(x=0,0.3)合金吸放氢循环床体壁应力的实验研究

Wall Stress induced by Ab-/Desorbing Hydrogen of LaNi_(5-x)Al_x(x=0,0.3) Hydrogen Storage Bed

采用电阻应变测量法研究了ＬａＮｉ５－ｘＡｌｘ系列合金吸放氢循环床体壁应力与循环次数、贮氢容量、壁厚以及松装比的关系。结果表明：松装比大和壁薄的贮氢床应力要大；且随吸放氢循环的进行，壁应力增大更明显；在贮氢量达到一定值后，壁应力才缓慢增大。

The relationships of wall stress of hydrogen storage bed with cycle index of hydrogen ab-/desorption, capacity of hydrogen storage, packing fraction, and thickness of the wall of hydrogen storage bed have been studied using strain gauge. The experimental results indicate that the wall stress increases with increasing packing fraction and the thickness of the wall. The wall stress slowly increases as amount of hydrogen storage reaches a certain value.