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Letter

Monitoring Strain Response of Epoxy Resin during Curing and Cooling Using an Embedded Strain Gauge

1
State Key Laboratory of Technologies in Space Cryogenic Propellants, Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2
School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China
*
Authors to whom correspondence should be addressed.
Sensors 2021, 21(1), 172; https://doi.org/10.3390/s21010172
Received: 11 November 2020 / Revised: 19 December 2020 / Accepted: 23 December 2020 / Published: 29 December 2020
(This article belongs to the Section Electronic Sensors)
The present work describes the monitoring system of the real-time strain response on the curing process of epoxy resin from the initial point of curing to the end, and the change in strain during temperature changes. A simple mould was designed to embed the strain gauge, thermometer, and quartz standard sample into the epoxy resin, so that the strain and the temperature were simultaneously measured and recorded. A cryogenic-grade epoxy resin was tested and the Differential Scanning Calorimetry (DSC) was used to analyse the curing process. Based on the DSC results, three curing processes were adopted to investigate their influence on strain response as well as residual strain of the epoxy resin. Moreover, impact strength of the epoxy resin with various curing temperatures were tested and the results indicate that the curing plays a crucial role on the mechanical properties. The method will find cryogenic application of epoxy adhesives and epoxy resin based composites to monitor the strain during the curing process as well as the cryogenic service. View Full-Text
Keywords: epoxy resin; strain response; curing process; thermal shrinkage epoxy resin; strain response; curing process; thermal shrinkage
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MDPI and ACS Style

Dong, H.; Liu, H.; Nishimura, A.; Wu, Z.; Zhang, H.; Han, Y.; Wang, T.; Wang, Y.; Huang, C.; Li, L. Monitoring Strain Response of Epoxy Resin during Curing and Cooling Using an Embedded Strain Gauge. Sensors 2021, 21, 172. https://doi.org/10.3390/s21010172

AMA Style

Dong H, Liu H, Nishimura A, Wu Z, Zhang H, Han Y, Wang T, Wang Y, Huang C, Li L. Monitoring Strain Response of Epoxy Resin during Curing and Cooling Using an Embedded Strain Gauge. Sensors. 2021; 21(1):172. https://doi.org/10.3390/s21010172

Chicago/Turabian Style

Dong, Hongyu, Huiming Liu, Arata Nishimura, Zhixiong Wu, Hengcheng Zhang, Yemao Han, Tao Wang, Yongguang Wang, Chuanjun Huang, and Laifeng Li. 2021. "Monitoring Strain Response of Epoxy Resin during Curing and Cooling Using an Embedded Strain Gauge" Sensors 21, no. 1: 172. https://doi.org/10.3390/s21010172

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