Interacting straight-sided buckles: An enhanced attraction by substrate elasticity

Interaction between two straight-sided buckles propagating in opposite directions has been investigated by atomic force microscopy. Below a critical separation distance, it is observed that the two buckles are attracted towards each other once their fronts have crossed. A mechanical analysis using f...

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Bibliographic Details
Published in:Journal of the mechanics and physics of solids 2019-03, Vol.124, p.526-535
Main Authors: Coupeau, C., Boijoux, R., Ni, Y., Parry, G.
Format: Article
Language:English
Subjects:
Atomic force microscopy
Buckling
Computational Physics
Elasticity
Engineering Sciences
Fasteners
Films and coatings
Finite element method
Finite elements simulations
Mechanical analysis
Mechanics
Mechanics of materials
Modal mixity
Phase diagrams
Physics
Separation
Substrates
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Summary:Interaction between two straight-sided buckles propagating in opposite directions has been investigated by atomic force microscopy. Below a critical separation distance, it is observed that the two buckles are attracted towards each other once their fronts have crossed. A mechanical analysis using finite element simulations has shown that the buckle interaction is strongly influenced by the substrate elasticity. The deviation of the two buckles from their initial straight propagation is discussed at the light of mode mixity mappings extracted from finite elements simulations along the crack path of the two interacting buckles. Finally, a phase diagram depending on both the separation distance and the film/substrate elastic mismatch is proposed, in good agreement with the experimental results. [Display omitted]
ISSN:0022-5096
1873-4782
DOI:10.1016/j.jmps.2018.11.010