Publication detail
Influence of Voids on Dimensional Accuracy and Stability in Bonded Metal-Composite Hybrid Joints
KUPČÁK, R. ZOUHAR, J. PŘIKRYL, R.
English title
Influence of Voids on Dimensional Accuracy and Stability in Bonded Metal-Composite Hybrid Joints
Type
Paper in proceedings (conference paper)
Language
en
Original abstract
This study investigates the impact of voids on the precision and dimensional stability of bonded joints in hybrid CFRP–aluminum assemblies for optical applications. Six CFRP samples were fabricated using filament winding and bonded to anodized aluminum alloy sleeves with DP 190 epoxy. Four samples were cured at 70 °C and two at 20 °C. Dimensional stability was assessed through radial runout measurements at three stages: post-manufacture, after environmental conditioning (including thermal cycling between +70 °C and –40 °C and six thermal shock cycles), and following mechanical resistance tests (shock, bump, and vibration per ISO 9022-3:2015). X-ray computed tomography (CT) revealed frequent defects such as adhesive starvation at joint edges, overflow, and a significant number of voids introduced during mixing. Porosity analysis showed that the presence of voids with equivalent diameters ≥0.5 mm strongly correlated with increased changes in radial runout, suggesting reduced dimensional stability.
Keywords in English
carbon fibre | composite materials | computed tomography | epoxy | precision bonding | voids
Released
2025-12-01
Publisher
Trans Tech Publications Ltd
Book
Solid State Phenomena
Pages from–to
57–68
Pages count
11
BIBTEX
@inproceedings{BUT200089,
author="Radim {Kupčák} and Jan {Zouhar} and Radek {Přikryl}",
title="Influence of Voids on Dimensional Accuracy and Stability in Bonded Metal-Composite Hybrid Joints",
booktitle="Solid State Phenomena",
year="2025",
journal="Solid State Phenomena",
pages="57--68",
publisher="Trans Tech Publications Ltd",
doi="10.4028/p-mnp8RD",
issn="1012-0394"
}