喷管堵盖开裂失效分析  

Failure Analysis of End Lid on Spray Pipe

作　　者：谢国君[1] 支小敏[2] 王影[1] 韩露[1] 

机构地区：[1]航天材料及工艺研究所,北京100076 [2]北京动力机械研究所,北京100074

出　　处：《宇航材料工艺》2014年第3期101-103,共3页Aerospace Materials & Technology

摘　　要：喷管堵盖所用材料为高硅氧短切纤维/钡酚醛树脂复合材料,部分堵盖在存储5年后发生开裂。通过失效分析认为,材料中树脂分布不均匀,部分区域树脂含量偏少、呈贫胶状态,造成该区域材料强度相对较低,同时由于堵盖的工艺特点决定其内部会存在一定水平的内应力,随着存储时间的增长,材料的强度下降、脆性增大,当强度降至低于内应力时,堵盖较薄弱区域即发生开裂。End lid on spray pipe is made of short glass fiber/barium phenolic resin,some end lids cracked after five years under naturally store.By examination,test and analysis,it is considered that the end lids cracked by the reason of that,mass ratio of resin of local part in end lid is relatively low that resulted in lower intensity.There was internal stress in the end lid at the same time and intensity of material fell gradually during naturally store,then the end lids cracked when intensity fell lower than internal stress.

关 键 词：堵盖 开裂 树脂含量 内应力 

分 类 号：TB332[一般工业技术—材料科学与工程]