中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 变厚度碳纤维复合材料孔隙率超声衰减模型 农业机械学报 2014,45 (7) 330-337
Position: Home > Articles > Ultrasonic Attenuation Model for Porosity Test of CFRP with Variable Thickness Transactions of the Chinese Society for Agricultural Machinery 2014,45 (7) 330-337

变厚度碳纤维复合材料孔隙率超声衰减模型

作  者：
李钊;周晓军;杨辰龙;王建龙;徐建勇;郑慧峰
单  位：
浙江大学流体动力与机电系统国家重点实验室;中国计量学院计量测试工程学院
关键词：
碳纤维复合材料;孔隙率;变厚度;超声衰减
摘  要：
根据超声波透射法检测原理,在一定的假设基础上,针对层数不同的层板碳纤维复合材料,建立了孔隙率与材料层数、超声衰减量的关系模型,利用5组不同层数样本试块的孔隙率和超声衰减量的试验数据,给出了基于模型的孔隙率拟合公式。分析和试验结果表明,拟合公式具有一定的精度,满足工程检测的要求。该模型可用于检测同批次下不同层数复合材料的孔隙率,且不需要制备大量的试验样本,既方便快捷又节约成本。在此基础上,对模型进行了修正,建立了变厚度层板复合材料孔隙率与材料厚度、超声衰减的关系模型,并对模型进行了讨论,该模型适合于大曲率半径结构件。
译  名：
Ultrasonic Attenuation Model for Porosity Test of CFRP with Variable Thickness
作  者：
Li Zhao;Zhou Xiaojun;Yang Chenlong;Wang Jianlong;Xu Jianyong;Zheng Huifeng;The State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University;College of Metrology and Measurement Engineering,China Jiliang University;
关键词：
Carbon fiber composite Porosity Variable thickness Ultrasonic attenuation
摘  要：
Based on the principle of ultrasonic transmission method with some hypothesis,a relationship model between porosity,the number of layers and the ultrasonic attenuation was established for different CFRP laminates. Firstly,under several assumed conditions,a relationship model between the number of layers and the ultrasonic attenuation was established without porosity. This model can reflect effect of other factors on the ultrasonic attenuation. Then,considering the effect of voids,the model was improved with the factor of porosity. Finally,using the test data of the porosity and ultrasonic attenuation for 5different laminate test blocks,a fitting porosity mode was given. The analysis and test result show the model has enough precision and can certify the requirement of engineering test. This model can be used to test the porosity of different composite laminates in same bath and doesn't need to prepare too many samples,so it is convenient and fast,as well as cost saving. On the basis,a relationship model between porosity,thickness and ultrasonic attenuation was established by revising the porosity model. As for composites with variable thickness,it is needed to replace the number of layers by thickness. What's more,refraction phenomenon may occur while the ultrasound propagates at the back wall. So other factors should be revised. The analysis shows that,the included angle between the propagation direction and the normal direction of back wall plays an important part in the model. And the attention will increase rapidly with the angle increases. So the model is suitable for the composites with big curvature radiuses.

相似文章

导出引用
计量
文章访问数: 8
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46