TY - JOUR
T1 - Quantitative investigation of local strain and defect formation in short glass fibre reinforced polymers using X-ray computed tomography
AU - Maurer, Julia
AU - Salaberger, Dietmar
AU - Jerabek, Michael
AU - Kastner, Johann
AU - Major, Zoltán
N1 - Funding Information:
This project was funded by Borealis Polyolefine GmbH, Linz. Financial support was also provided by the Austrian research funding association (FFG) under the scope of the COMET programme within the research project ’Photonic Sensing for Smarter Processes (PSSP)’ (contract # 871974). This programme is promoted by BMK, BMDW, the federal state of Upper Austria and the federal state of Styria, represented by SFG. We want to thank Dieter Nicolussi, representatively for all those who worked on the ex situ experiments conducted at Borealis Polyolefine GmbH, Linz.
Publisher Copyright:
© 2022 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2022
Y1 - 2022
N2 - Knowledge of the mechanical behaviour, especially at the microscale level, is of great importance for a better understanding of the failure mechanisms of injection-moulded glass fibre reinforced polymers. Furthermore, knowledge about deformation and damage processes helps to improve the quality of structural simulations. Interrupted in situ tensile testing by X-ray computed tomography allows a stepwise, time-dependent investigation of the local strain and defect formation. The objective of this work is the determination of strains by Digital Volume Correlation and the segmentation and characterisation of defects. The correlation between different defect types (matrix fracture, fibre-matrix debonding, fibre fracture and fibre pull-out) and fibre orientation is shown. Defect localisation and volume and their relation to local strain are illustrated. The investigation of strain hot spots at low load levels allow for the prediction of the position of fracture onset. Moreover, the strain distribution at higher load levels can be used to comprehend the fracture surface. Various evaluation and visualisation approaches that enable simultaneous analysis of defects and strains are demonstrated.
AB - Knowledge of the mechanical behaviour, especially at the microscale level, is of great importance for a better understanding of the failure mechanisms of injection-moulded glass fibre reinforced polymers. Furthermore, knowledge about deformation and damage processes helps to improve the quality of structural simulations. Interrupted in situ tensile testing by X-ray computed tomography allows a stepwise, time-dependent investigation of the local strain and defect formation. The objective of this work is the determination of strains by Digital Volume Correlation and the segmentation and characterisation of defects. The correlation between different defect types (matrix fracture, fibre-matrix debonding, fibre fracture and fibre pull-out) and fibre orientation is shown. Defect localisation and volume and their relation to local strain are illustrated. The investigation of strain hot spots at low load levels allow for the prediction of the position of fracture onset. Moreover, the strain distribution at higher load levels can be used to comprehend the fracture surface. Various evaluation and visualisation approaches that enable simultaneous analysis of defects and strains are demonstrated.
KW - Glass fibre reinforced polymers
KW - X-Ray computed tomography
KW - defect characterisation
KW - digital volume correlation
KW - in situ tensile testing
UR - http://www.scopus.com/inward/record.url?scp=85131312542&partnerID=8YFLogxK
U2 - 10.1080/10589759.2022.2075865
DO - 10.1080/10589759.2022.2075865
M3 - Article
SN - 1058-9759
VL - 37
SP - 582
EP - 600
JO - Nondestructive Testing and Evaluation
JF - Nondestructive Testing and Evaluation
IS - 5
ER -