scholarly journals An improved delamination fatigue cohesive interface model for complex three-dimensional multi-interface cases

2018 ◽  
Vol 107 ◽  
pp. 633-646 ◽  
Author(s):  
Chongcong Tao ◽  
Supratik Mukhopadhyay ◽  
Bing Zhang ◽  
Luiz F. Kawashita ◽  
Jinhao Qiu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Interface Model ◽  
Cohesive Interface

scholarly journals A note on traction continuity across an interface in a geometrically non-linear framework

2018 ◽  
Vol 24 (8) ◽  
pp. 2478-2496 ◽  
Author(s):  
Ali Javili
Keyword(s):  
Spatial Configuration ◽  
Three Dimensional ◽  
Interface Model ◽  
Cohesive Interface ◽  
Interface Models ◽  
Linear Framework ◽  
Non Linear ◽  
Spatial Configurations ◽  
Elastic Interface ◽  
General Interface

The objective of this contribution is to elaborate on the notion of “traction continuity” across an interface at finite deformations. The term interface corresponds to a zero-thickness model representing the interphase between different constituents in a material. Commonly accepted interface models are the cohesive interface model and the elastic interface model. Both the cohesive and elastic interface models are the limit cases of a generalized interface model. This contribution aims to rigorously analyze the concept of the traction jump for the general interface model. The governing equations of the general interface model in the material as well as spatial configurations are derived and the traction jump across the interface for each configuration is highlighted. It is clearly shown that the elastic interface model undergoes a traction jump in both the material and spatial configurations according to a generalized Young–Laplace equation. For the cohesive interface model, however, while the traction field remains continuous in the material configuration, it can suffer a jump in the spatial configuration. This finding is particularly important since the cohesive interface model is based on the assumption of traction continuity across the interface and that the term “traction” often refers to the spatial configuration and not the material one. Thus, additional care should be taken when formulating an interface model in a geometrically non-linear framework. The theoretical findings for various interface models are carefully illustrated via a series of two-dimensional and three-dimensional numerical examples using the finite element method.

Neutron and X-ray diffraction studies and cohesive interface model of the fatigue crack deformation behavior

2008 ◽  
Vol 88 (8) ◽  
pp. 553-565 ◽  
Author(s):  
Rozaliya Barabash ◽  
Yanfei Gao ◽  
Yinan Sun ◽  
Soo Yeol Lee ◽  
Hahn Choo ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Deformation Behavior ◽  
Interface Model ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cohesive Interface

IMPROVEMENT OF THE PEELING STRENGTH OF THIN FILMS BY A BIOINSPIRED HIERARCHICAL INTERFACE

2013 ◽  
Vol 05 (02) ◽  
pp. 1350012 ◽  
Author(s):  
HONG-PING ZHAO ◽  
YECHENG WANG ◽  
BING-WEI LI ◽  
XI-QIAO FENG
Keyword(s):  
Thin Film ◽  
Mechanical Properties ◽  
Interface Model ◽  
Cohesive Interface ◽  
Flat Interface ◽  
Peeling Strength ◽  
Wavy Interface ◽  
Sinusoidal Shape ◽  
Film Substrate ◽  
Curved Interface

The peeling behavior of a thin film bonded to a substrate is investigated by using the cohesive interface model. We compare the peeling processes of film/substrate interfaces with three different geometric shapes, including a flat interface, a curved interface of sinusoidal shape, and a wavy interface with two-level sinusoidal hierarchy. The effect of the peeling angle on the maximal peeling strength is also examined. It is demonstrated that the peeling strength can be significantly improved by introducing a hierarchical wavy morphology at the film/substrate interface. This study may be helpful for the design of film/substrate systems with enhanced mechanical properties.

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