3D printing technology is a rapidly developing manufacturing technology, which is known as a core technology in the third industrial revolution. With the continuous improvement of the application of 3D printing products, the health monitoring of the 3D printing structure is particularly important. Fiber Bragg grating (FBG) sensing technology is a new type of optical sensing technology with unique advantages comparing to traditional sensing technology, and it has great application prospects in structural health monitoring. In this paper, the FBG sensors embedded in the internal structure of the 3D printing were used to monitor the static and dynamic strain variation of 3D printing structure during loading process. The theoretical result and experimental result has good consistency and the characteristic frequency detected by FBG sensor is consistent with the testing results of traditional accelerator in the dynamic experiment. The results of this paper preliminary validate that FBG embedded in the 3D printing structure can effectively detecting the static and dynamic stain change of the 3D printing structure, which provide some guidance for the health monitoring of 3D printing structure.
The main research is thermal strain sensing characteristics of epoxy resin in fiber Bragg grating (FBG) packaging process. The results of experiment showed that modified epoxy acrylate resin which is often used to package FBG, occurred glass transition at about 65°C, of which the thermal strain sensing sensitivity decreased. Meanwhile, this study showed that FBG is packaged by the modified epoxy acrylate resin after heat treatment has the effect on strain measurement. The experiment indicated that strain measuring consistency and repeatability of FBG has been significantly improved after heat treatment at high temperature 120°C. Finally, a FBG packaging technology about curable epoxy resin curing at room temperature is proposed, and it can improved strain and temperature measuring consistency and repeatability.
The main research is thermal strain sensing characteristics of epoxy resin in fiber Bragg grating (FBG) packaging process. The results of experiment showed that modified epoxy acrylate resin which is often used to package FBG, occurred glass transition at about 65°C, of which the thermal strain sensing sensitivity decreased. Meanwhile, this study showed that FBG is packaged by the modified epoxy acrylate resin after heat treatment has the effect on strain measurement. The experiment indicated that strain measuring consistency and repeatability of FBG has been significantly improved after heat treatment at high temperature 120°C. Finally, a FBG packaging technology about curable epoxy resin curing at room temperature is proposed, and it can improved strain and temperature measuring consistency and repeatability.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.