On the opening and edge-sliding fracture toughness of aluminium-epoxy adhesive joints

1978 ◽  
Vol 13 (10) ◽  
pp. 2280-2284 ◽  
Author(s):  
Y. W. Mai ◽  
A. S. Vipond
Keyword(s):  
Fracture Toughness ◽  
Epoxy Adhesive ◽  
Adhesive Joints

On the effect of pulsed laser ablation on shear strength and mode I fracture toughness of Al/epoxy adhesive joints

2015 ◽  
Vol 29 (17) ◽  
pp. 1820-1830 ◽  
Author(s):  
Giovanni Chiodo ◽  
Marco Alfano ◽  
Stefano Pini ◽  
Alessandro Pirondi ◽  
Franco Furgiuele ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Shear Strength ◽  
Laser Ablation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Epoxy Adhesive ◽  
Adhesive Joints ◽  
Mode I ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness

scholarly journals Effect of Mechanical Pretreatments on Damage Mechanisms and Fracture Toughness in CFRP/Epoxy Joints

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1512
Author(s):  
Chiara Morano ◽  
Ran Tao ◽  
Marco Alfano ◽  
Gilles Lubineau
Keyword(s):  
Fracture Toughness ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Polymer Matrix ◽  
Mechanical Tests ◽  
Adhesive Joints ◽  
Fiber Reinforced Polymers ◽  
Composite Joints ◽  
Damage Mechanisms ◽  
Grit Blasting

Adhesive bonding of carbon-fiber-reinforced polymers (CFRPs) is a key enabling technology for the assembly of lightweight structures. Surface pretreatment is necessary to remove contaminants related to material manufacturing and ensure bond reliability. The present experimental study focuses on the effect of mechanical abrasion on the damage mechanisms and fracture toughness of CFRP/epoxy joints. The analyzed CFRP plates were provided with a thin layer of surface epoxy matrix and featured enhanced sensitivity to surface preparation. Various degrees of morphological modification and fairly controllable carbon fiber exposure were obtained using sanding with emery paper and grit-blasting with glass particles. In the sanding process, different grit sizes of SiC paper were used, while the grit blasting treatment was carried by varying the sample-to-gun distance and the number of passes. Detailed surveys of surface topography and wettability were carried out using various methods, including scanning electron microscopy (SEM), contact profilometry, and wettability measurements. Mechanical tests were performed using double cantilever beam (DCB) adhesive joints. Two surface conditions were selected for the experiments: sanded interfaces mostly made of a polymer matrix and grit-blasted interfaces featuring a significant degree of exposed carbon fibers. Despite the different topographies, the selected surfaces displayed similar wettability. Besides, the adhesive joints with sanded interfaces had a smooth fracture response (steady-state crack growth). In contrast, the exposed fibers at grit-blasted interfaces enabled large-scale bridging and a significant R-curve behavior. While it is often predicated that quality composite joints require surfaces with a high percentage of the polymer matrix, our mechanical tests show that the exposure of carbon fibers can facilitate a remarkable toughening effect. These results open up for additional interesting prospects for future works concerning toughening of composite joints in automotive and aerospace applications.

Mixed-mode fatigue behavior of degraded toughened epoxy adhesive joints

2011 ◽  
Vol 31 (2) ◽  
pp. 88-96 ◽  
Author(s):  
N.V. Datla ◽  
J. Ulicny ◽  
B. Carlson ◽  
M. Papini ◽  
J.K. Spelt
Keyword(s):  
Mixed Mode ◽  
Fatigue Behavior ◽  
Epoxy Adhesive ◽  
Adhesive Joints ◽  
Toughened Epoxy

Design and development of novel reactive amine nanocontainers for a self-healing epoxy adhesive: self-repairing investigation using the lap shear test

RSC Advances ◽  
2015 ◽  
Vol 5 (27) ◽  
pp. 21023-21032 ◽  
Author(s):  
Sepideh Khoee ◽  
Zahra Kachoei
Keyword(s):  
Fracture Toughness ◽  
Shear Test ◽  
Epoxy Adhesive ◽  
Self Healing ◽  
Design And Development ◽  
Lap Shear ◽  
Lap Shear Test ◽  
P Recovery

Recovery of fracture toughness of a self-healing epoxy adhesive is achieved by using a novel amine nanocontainer.

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