|本期目录/Table of Contents|

[1]孙国庆,马亚利,霍瑞丽,等.温度-荷载耦合作用下玻璃纤维增强复合材料-泡沫夹层结构Ⅰ-Ⅱ混合型界面断裂试验[J].南京工业大学学报(自然科学版),2019,41(02):179-186.[doi:10.3969/j.issn.1671-7627.2019.02.008]
 SUN Guoqing,MA Yali,HUO Ruili,et al.Experiments on mixing Ⅰ-Ⅱ interfacial fracture toughness of glass fiber reinforced plastic-foam sandwich structure under coupling effects of high temperature and loading[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2019,41(02):179-186.[doi:10.3969/j.issn.1671-7627.2019.02.008]
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温度-荷载耦合作用下玻璃纤维增强复合材料-泡沫夹层结构Ⅰ-Ⅱ混合型界面断裂试验()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
41
期数:
2019年02期
页码:
179-186
栏目:
出版日期:
2019-03-19

文章信息/Info

Title:
Experiments on mixing Ⅰ-Ⅱ interfacial fracture toughness of glass fiber reinforced plastic-foam sandwich structure under coupling effects of high temperature and loading
文章编号:
1671-7627(2019)02-0179-08
作者:
孙国庆马亚利霍瑞丽刘伟庆王璐
南京工业大学 土木工程学院,江苏 南京 211800
Author(s):
SUN GuoqingMA YaliHUO RuiliLIU WeiqingWANG Lu
College of Civil Engineering,Nanjing Tech University,Nanjing 211800,China
关键词:
复合材料 夹层结构 单臂弯曲试验(SLB) 应变能释放率 裂纹扩展准则
Keywords:
composite material sandwich structure single leg bending test(SLB) strain energy release rate interface crack extension criterion
分类号:
TB332
DOI:
10.3969/j.issn.1671-7627.2019.02.008
文献标志码:
A
摘要:
复合材料夹层结构在长期的使用过程中发现界面剥离是夹层结构失效的常见模式之一,因此十分有必要研究不同温度条件下,玻璃纤维增强复合材料(GFRP)-聚氨酯泡沫夹层结构的I-II混合型界面断裂韧性。本项研究采用单臂弯曲试验(SLB)的方法测量GFRP-聚氨酯泡沫夹层结构的荷载-挠度曲线和裂纹扩展长度。试验结果表明:随着温度的升高,裂纹沿着界面扩展,芯材无破坏现象,极限承载力呈下降趋势。通过计算应变能释放率发现,随着温度的升高应变能释放率峰值呈上升趋势。运用界面裂纹扩展准则判定裂纹扩展符合理论要求。
Abstract:
Composite material sandwich structure was widely used in many engineering fields due to its excellent performance.It is found that interfacial peeling is one of the common patterns of sandwich structure failure in the long-term use.The mixing I-II interfacial fracture toughness of glass fiber reinforced plastic(GFRP)-polyurethane foam sandwich structure under the effect of different temperatures was considered.The load-displacement curve and length of crack propagation of GFRP-foam sandwich structure were measured by single leg bending test(SLB).Results showed that as the temperature increased,the crack was expanded along the interface,the core material had no damage,and the ultimate bearing capacity was decreased.It was found that the peak of strain energy release rate was on the upward trend with the increase of temperature.The application of interface crack extension criterion to determine the crack propagation met the theoretical requirement.

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备注/Memo

备注/Memo:
收稿日期:2017-08-04
基金项目:国家自然科学基金(51678297,51408305); 江苏省科技厅基础研究计划青年基金(BK20140946)
作者简介:孙国庆(1992—),男,E-mial:sgqtdcq@njtech.edu.cn; 王璐(联系人),副教授,E-mail:kevinlwang@hotmail.com.
引用本文:孙国庆,马亚利,霍瑞丽,等.温度-荷载耦合作用下玻璃纤维增强复合材料-泡沫夹层结构Ⅰ-Ⅱ混合型界面断裂试验[J].南京工业大学学报(自然科学版),2019,41(2):179-186..
更新日期/Last Update: 2019-03-31