Load and temperature assessment in sandwich-structured composite using embedded optical sensors

Michal Jurek; Katarzyna Majewska; Magdalena Mieloszyk; Wieslaw Ostachowicz

doi:10.1117/12.2513271

1 April 2019 Load and temperature assessment in sandwich-structured composite using embedded optical sensors

Michal Jurek, Katarzyna Majewska, Magdalena Mieloszyk, Wieslaw Ostachowicz

Proceedings Volume 10972, Health Monitoring of Structural and Biological Systems XIII; 109722H (2019) https://doi.org/10.1117/12.2513271
Event: SPIE Smart Structures + Nondestructive Evaluation, 2019, Denver, Colorado, United States

Abstract

Sandwich-structured composites consisted of two outer skins and a lightweight internal core. Due to structural and geometrical properties, these composites are light, have a relatively high flexural strength and could have high thermal insulating characteristics. Therefore, such materials are widely used in many industrial applications (e.g. aeronautics, civil engineering, road vehicles, and ships) especially where high strength to weight ratio is required. In such applications, it is often important to control the loads and operation conditions e.g. temperature. Apart from strength requirements, due to the safety issues, there is a big need for equipping structures in structural health monitoring (SHM) systems. One of the promising monitoring methods base on Fiber Bragg Grating (FBG) sensors. It is due to the advantages of FBG sensors such as small size and weight, high corrosion resistance. The paper presents an application of FBG sensors for assessment of load and temperature influences on a composite sample. For this purpose glass fiber - foam sandwich-structured composite sample with embedded FBG sensors was handmade. A relationship between temperature and strain as well as a relationship between static point load and strain determined from FBG sensors measurements were analyzed. Structural responses for static point load applied in selected locations on the sample surface were studied.

Citation Download Citation

Michal Jurek, Katarzyna Majewska, Magdalena Mieloszyk, and Wieslaw Ostachowicz "Load and temperature assessment in sandwich-structured composite using embedded optical sensors", Proc. SPIE 10972, Health Monitoring of Structural and Biological Systems XIII, 109722H (1 April 2019); https://doi.org/10.1117/12.2513271

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