In-line residual strain monitoring for thermoplastic automated tape layup using fiber Bragg grating sensors

Neha Yadav, Karol Wachtarczyk, Paweł Gąsior, Ralf Schledjewski, Jerzy Kaleta

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung


Automated tape layup (ATL) has been used extensively for manufacturing composites laminates using unidirectional prepregs for high-performance industries like aerospace. Residual stress is one of the defects that adversely affect the layup quality. These stresses affect geometrical tolerances in the form of distortion of the final product and are found to have a detrimental impact on the mechanical properties. In-line monitoring of such defects will help in productivity increase and achieving a reliable process control. The aim of the present work is to demonstrate the feasibility of fiber Bragg grating sensors for monitoring residual strains. FBGs are embedded inside a thermoplastic UD laminate. Temperature and strain discrimination is performed to recognize intermittent residual strains during the layup. Finally, intermittent residual strain is used to develop an understanding of the global residual strain. Effect of selective process parameter on residual stress formation and the evolution of the same is also analyzed.

Seiten (von - bis)1590-1602
FachzeitschriftPolymer Composites
PublikationsstatusVeröffentlicht - 5 Jan. 2022

Bibliographische Notiz

Funding Information:
This work has been supported by the OeAD – Austria's Agency for Education and Internationalisation under Project No. PL 05/2019 and the Polish National Agency for Academic Exchange (NAWA) under Grant No. PPN/BIL/2018/1/00058. The authors kindly acknowledge the financial support through project InP4 (project no. 864824) provided by the Austrian Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology within the frame of the FTI initiative “Produktion der Zukunft”, which is administered by the Austrian Research Promotion Agency (FFG).

Publisher Copyright:
© 2022 The Authors. Polymer Composites published by Wiley Periodicals LLC on behalf of Society of Plastics Engineers.

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