复材泡沫夹芯筒加劲肋法兰连接性能试验

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (8): 66-71.

复材泡沫夹芯筒加劲肋法兰连接性能试验

李峰^1,2,赵志波²,陶杰²

1.东南大学土木工程学院,南京210096;
2.陆军工程大学野战工程学院,南京210007

收稿日期:2018-11-05 出版日期:2019-08-28 发布日期:2019-08-28
作者简介:李峰(1979-),男,博士,副教授,研究方向为复合材料结构与力学,83812546@qq.com。
基金资助:
国家自然科学基金资助(51778620, 51708552);中国博士后科学基金(2017M611657)

CONNECTION PERFORMANCE TEST ON RIB-STIFFENED FLANGE OF COMPOSITE FOAM CORE SANDWICH TUBE

LI Feng^1,2, ZHAO Zhi-bo², TAO Jie²

1.School of Civil Engineering, Southeast University, Nanjing 210096, China;
2.College of Field Engineering, Army Engineering University, Nanjing 210007, China

Received:2018-11-05 Online:2019-08-28 Published:2019-08-28

摘要/Abstract

摘要： 为了实现复材泡沫夹芯筒间及与其他结构的有效连接,提出了一种加劲肋法兰连接形式,利用真空辅助树脂导入工艺制备了一体成型的复材泡沫夹芯筒与加劲肋法兰。分别对两组复材泡沫夹芯筒加劲肋法兰试件进行了偏心压缩试验和悬臂横向荷载试验,观察了试件的受力过程和破坏形态,获得了荷载-位移曲线。结果表明:复材泡沫夹芯筒加劲肋法兰在偏压荷载下,在加劲肋与夹芯筒筒身过渡处发生了纤维压缩断裂的破坏模式,该位置为偏心受压下试件的承载薄弱点。在横向荷载作用下,加劲肋法兰先发生加劲肋蒙皮纤维剥离破坏,再发生复材法兰与筒身连接部位的纤维拉伸破坏,最后复材法兰盘出现整体褶皱变形失效,法兰的破坏过程具有明显的渐进失效特征。

关键词: 复材泡沫夹芯筒, 加劲肋法兰, 偏压试验, 悬臂试验, 破坏模式

Abstract: In order to realize the effective connection between composite foam core sandwich tubes or between composite foam core sandwich tubes and other structures, a connection form of rib-stiffened flange is put forward, and integral molding composite foam core sandwich tube and rib-stiffened flange were produced by vacuum assisted resin introduction technique. Eccentric compression tests and cantilever lateral load tests were carried out on two-group specimens of composite foam core sandwich tube rib-stiffened flanges respectively. The loading process and failure mode were observed and the load-displacement curve was obtained. The results showed that when composite foam core sandwich tube rib-stiffened flange was under eccentric load, the failure mode of fiber compression fracture occurred in the transition position between stiffening ribs and sandwich tube body, and this position was the weak point of the specimen under eccentric compression. Under the effect of transverse load, the rib-stiffened flange was firstly subjected to fiber peeling failure of stiffening rib skin, then subjected to the fiber tensile failure at the connecting part of the composite flange and tube body. Finally, the flange of composite material appeared the failure of integral fold deformation. The failure process of flange has obvious characteristic of progressive failure.

Key words: composite foam core sandwich tube, rib-stiffened flange, eccentric compression test, cantilever test, failure mode

中图分类号:

TB332

李峰,赵志波,陶杰. 复材泡沫夹芯筒加劲肋法兰连接性能试验[J]. 玻璃钢/复合材料, 2019, 0(8): 66-71.

LI Feng, ZHAO Zhi-bo, TAO Jie. CONNECTION PERFORMANCE TEST ON RIB-STIFFENED FLANGE OF COMPOSITE FOAM CORE SANDWICH TUBE[J]. Fiber Reinforced Plastics/Composites, 2019, 0(8): 66-71.

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