TY - JOUR
T1 - Internal strain assessment using FBGs in a thermoplastic composite subjected to quasi-static indentation and low-velocity impact
AU - Mulle, Matthieu
AU - Yudhanto, Arief
AU - Lubineau, Gilles
AU - Yaldiz, R.
AU - Schijve, W.
AU - Verghese, N.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): BAS/1/1315-01-01
Acknowledgements: The research reported in this publication was supported by the Saudi Arabia Basic Industries Corporation (SABIC) under Grant Agreement number RGC/3/2050-01-01 and by King Abdullah University of Science and Technology (KAUST), under award number BAS/1/1315-01-01. The authors are very grateful to Dr. Husam Wafai and Ditho Pulungan for their technical support and valuable advice.
PY - 2019/2/19
Y1 - 2019/2/19
N2 - We present, for the first time, an experimental investigation of internal strain monitoring in thermoplastic composites subjected to quasi-static indentation and low-velocity impact using embedded fiber Bragg gratings (FBGs). The goal is to highlight the interest and limitations of the in-core instrumentation of glass fiber-reinforced polypropylene laminates subjected to these two classical loading conditions. We propose an instrumentation strategy utilizing FBGs that is expected to provide a reliable set of internal strain values and strain rates, which can be used for the analysis of the damage behavior and the validation of a numerical mesoscale model of laminates. Based on a specific sensor insertion procedure, monitoring techniques and optical observations, we show how the applied methodology alleviates major issues, such as determining the in-plane and through-thickness position of the embedded FBGs, their influence on the structural integrity or the interpretation of the reflected optical signal.
AB - We present, for the first time, an experimental investigation of internal strain monitoring in thermoplastic composites subjected to quasi-static indentation and low-velocity impact using embedded fiber Bragg gratings (FBGs). The goal is to highlight the interest and limitations of the in-core instrumentation of glass fiber-reinforced polypropylene laminates subjected to these two classical loading conditions. We propose an instrumentation strategy utilizing FBGs that is expected to provide a reliable set of internal strain values and strain rates, which can be used for the analysis of the damage behavior and the validation of a numerical mesoscale model of laminates. Based on a specific sensor insertion procedure, monitoring techniques and optical observations, we show how the applied methodology alleviates major issues, such as determining the in-plane and through-thickness position of the embedded FBGs, their influence on the structural integrity or the interpretation of the reflected optical signal.
UR - http://hdl.handle.net/10754/631204
UR - https://www.sciencedirect.com/science/article/pii/S0263822318343769
UR - http://www.scopus.com/inward/record.url?scp=85061866568&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2019.02.085
DO - 10.1016/j.compstruct.2019.02.085
M3 - Article
AN - SCOPUS:85061866568
VL - 215
SP - 305
EP - 316
JO - Composite Structures
JF - Composite Structures
SN - 0263-8223
ER -