Determination of mode I interlaminar fracture toughness of composite by a wedge-insert double cantilever beam and the nonlinear J integral

JC Ding, W Xu - Composites Science and Technology, 2021 - Elsevier
Wedge-insert double cantilever beam (WDCB) is a promising test specimen for measuring
the mode I fracture toughness of composite material subjected to impact and static loadings …

[HTML][HTML] Experimental method for mode I fracture toughness of composite laminates using wedge loaded double cantilever beam specimens

S Oshima, A Yoshimura, Y Hirano… - Composites Part A …, 2018 - Elsevier
This study proposes a simple and accurate data reduction scheme for the wedge loaded
double cantilever beam (DCB) specimen. The effects of axial loading applied by wedges …

[HTML][HTML] DLC-treated aramid-fibre composites: Tailoring nanoscale-coating for macroscale performance

M Kanerva, S Korkiakoski, K Lahtonen… - Composites science and …, 2019 - Elsevier
This work aims to quantify the effect of a diamond-like carbon coating (DLC) treatment of
aramid fibres and to reveal the conversion of a fibre-level performance leap on the …

A concept for defining the mixed-mode behaviour of tough epoxy film adhesives by single specimen design

J Jokinen, O Orell, M Wallin… - Journal of Adhesion …, 2020 - Taylor & Francis
Fracture modes I and II interact in mixed-mode loading conditions, and the interaction is
typically taken into account using a mixed-mode fracture criterion. In this work, a concept for …

[PDF][PDF] The influence of the number of adhesive plies (FM 300-2) on fracture properties

J Jokinen, M Wallin, M Kanerva - The 32nd Congress of the International …, 2020 - icas.org
Adhesively bonded joints, their strength and fracture properties, are influenced by several
factors of design and material. One main factor is the thickness of the bond line, ie thickness …

Analyses of criticality for multiple-site delaminations in the flap spar of Finnish F/A-18 aircraft

J Jokinen, M Kanerva, M Wallin… - The Aeronautical …, 2021 - cambridge.org
Metal-composite airframes will suffer various defects during their lifetime. One category of
defects is composite laminate delamination. This study evaluates the criticality of …

Fatigue performance of DIARC® plasma coated bonded metal specimens

J Aakkula, J Jokinen, O Saarela - International Journal of Adhesion and …, 2017 - Elsevier
The fatigue performance of DIARC® vacuum plasma surface treatment for titanium, stainless-
steel and aluminium structural bonding was tested with double lap shear test specimens. In …

A Review of Aeronautical Fatigue Investigations in Finland April 2017-March 2019

T Viitanen, A Siljander - 36th Conference of the International Committee on …, 2019 - cris.vtt.fi
This document was prepared for the delivery to the 36th Conference of the International
Committee on Aeronautical Fatigue and Structural Integrity (ICAF) scheduled to be held in …

[PDF][PDF] Adjusted shapes of adhesively bonded repair patches for the early indication of debond in fighter aircraft structures

J Jokinen, M Wallin, M Kanerva - Congress of the International Council of …, 2021 - icas.org
Adhesively bonded joints are widely used in structural repairs of aeroplanes. The main
disadvantages of adhesive bonding are the complex bonding process and the inability to …

Closed-Form J-Integral and Its Applications for Measurement of Mode I Interlaminar Fracture Toughness of Composites

WU XU, J DING - Proceedings of the American …, 2021 - dpi-proceedings.com.destechpub …
Due to the interlaminar properties of composites are low, delamination is one of the major
failure modes. It threatens the safety of composite structure subjected to out-of-plane static …