Effect of surface treatment for metallicz-reinforcements on interlaminar fracture toughness of CFRP/CFRP joints

M. Juergens, A. Kurtovic, T. Mertens, A. C. Nogueira, H. Lang, M. Kolb, P. Strobach, E. Hombergsmeier, K. Drechsler

Publikation: Beitrag in Buch/Bericht/KonferenzbandKonferenzbeitragBegutachtung

4 Zitate (Scopus)

Abstract

The weight saving potential of carbon fiber reinforced polymers (CFRP) in primary aircraft structures is strongly determined by the applied joint design. Through-thickness reinforcements (z-reinforcements) are introduced to increase the delamination resistance of laminates and joints and thus improve their damage tolerance. In the present work, an innovative process is presented for a cost and time-efficient manufacture, with multidimensional metallic structures enhancing the joint's interlaminar fracture toughness. Spikes bent in the out-of-plane direction made of stainless steel and titanium were exposed to wet-chemical (HF/HNO3, Turco 5578®) and physical (pulsed laser irradiation; Nd:YVO4, 1064 nm) surface treatments to create micro-and nano-scaled oxide layer morphologies respectively. Mode I energy release rate is improved significantly through the introduction of pretreated reinforcements into a double cantilever beam (DCB) joint geometry. Laser irradiation shows a superior performance when compared to alkaline etched or baseline sandblasted spikes. Surface analyses through SEM and XPS were employed to further correlate fracture mechanical results to the oxide surface morphology, chemical composition and surface contaminations resulting from the applied co-bonding process. Reference joints featuring pretreated sheets without spikes in the bondline reveal similar results.

OriginalspracheEnglisch
TitelSAMPE Baltimore 2015 Conference and Exhibition
Herausgeber (Verlag)Soc. for the Advancement of Material and Process Engineering
ISBN (elektronisch)9781934551196
PublikationsstatusVeröffentlicht - 2015
VeranstaltungSAMPE Baltimore 2015 Conference and Exhibition - Baltimore, USA/Vereinigte Staaten
Dauer: 18 Mai 201521 Mai 2015

Publikationsreihe

NameInternational SAMPE Technical Conference
Band2015-January

Konferenz

KonferenzSAMPE Baltimore 2015 Conference and Exhibition
Land/GebietUSA/Vereinigte Staaten
OrtBaltimore
Zeitraum18/05/1521/05/15

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