期刊
COMPOSITES PART B-ENGINEERING
卷 94, 期 -, 页码 389-398出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2016.02.060
关键词
Process monitoring; Resin transfer moulding (RTM); Resin flow; Cure
资金
- Federal Ministry for Economic Affairs and Energy (BMWi) in the frame of the 4th call of the Aeronautical Research Program [20W1110G]
The presented work investigates Differential Electrical Time Domain Reflectometry (D-TDR) as a method to monitor the flow front position and curing degree of resin during manufacturing of composite structures by vacuum infusion technology. The sensor concept is based on the physical principle that a voltage pulse introduced into a transmission line, which serves as a sensor, is reflected at impedance changes, which correlate to changes of the dielectric properties along the line. The method's accuracy under different boundary conditions is investigated by infiltrating glass and carbon fiber preforms on metallic and wooden toolings with epoxy resins. A shielded sensor concept is presented, which eliminates the influence of conductive materials on the signal. For all tested fiber/tooling combinations, the monitoring method shows a good agreement between the flow front position and optically determined flow fronts. Degree of cure measurements at ambient and elevated temperatures show a correlation with Differential Scanning Calorimetry (DSC) and rheology analyses. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据