Fracture Mechanics of Interface Failure

1984 ◽  
Vol 40 ◽  
Author(s):  
Kevin Kendall
Keyword(s):  
Composite Materials ◽  
Energy Balance ◽  
Fracture Mechanics ◽  
Brittle Materials ◽  
Crack Deflection ◽  
Balance Theory ◽  
Interface Failure ◽  
Crack Control ◽  
Brittle Solids ◽  
Dislocation Formation

AbstractInterfaces are important in ceramic and other composite materials because they can be used to control cracks, the major source of weakness and unreliability in brittle solids. Brittle materials fracture catastrophically, but may be converted into tough composites by the injection of interfaces which retard or deflect the cracks. This paper examines the behaviour of cracks at interfaces and demonstrates several mechanisms for crack control in brittle systems. Crack stopping, dislocation formation, and crack deflection at interfaces have been illustrated by experiments on rubber models and analysed by the energy balance theory of fracture.

scholarly journals Crack deflection in brittle materials by Finite Fracture Mechanics

2016 ◽  
Vol 2 ◽  
pp. 1975-1982
Author(s):  
Alberto Sapora ◽  
Pietro Cornetti ◽  
Alberto Carpinteri ◽  
Vladislav Mantič
Keyword(s):  
Fracture Mechanics ◽  
Brittle Materials ◽  
Crack Deflection ◽  
Finite Fracture Mechanics

scholarly journals A Promising Way to Model Damage in Composite and Dry Fabrics Using a Discrete Element Method (DEM)

2016 ◽  
Vol 828 ◽  
pp. 119-136
Author(s):  
Frederic Dau ◽  
J. Girardot ◽  
B.D. Le
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Fracture Mechanics ◽  
Discrete Element Method ◽  
Brittle Materials ◽  
Discrete Element ◽  
Matrix Cracking ◽  
Fiber Break ◽  
Made In ◽  
Element Method

A promising way to model fracture mechanics with the use of an original Discrete Element Method (DEM) is proposed. After proving the ability of the method to capture kinetic damage induced by cracking phenomena in brittle materials such as silica [1], taking advantage of the method for composite materials applications is the main purpose of this work. This paper highlights recent and current developments to prove abilities of the DEM to give some answers to challenges : i) use the present DEM to model damage mechanisms (matrix cracking, debonding, fiber break and delamination) in a composite material ii) deal with impact applications on dry fabrics using the DEM. All developments are made in the home made software GRANOO (GRANular Objet Oriented) [2]. The promising results are commented and the on going developments are exposed.

Experimental Study on the Failure Criterion for Brittle Materials in Compression

2011 ◽  
Vol 320 ◽  
pp. 259-262
Author(s):  
Xu Ran ◽  
Zhe Ming Zhu ◽  
Hao Tang
Keyword(s):  
Thin Film ◽  
Experimental Study ◽  
Compressive Strength ◽  
Fracture Mechanics ◽  
Failure Criterion ◽  
Brittle Materials ◽  
Experimental Results ◽  
Experiment Study ◽  
Confining Stress ◽  
Theoretical Results

The mechanical behavior of multi-cracks under compression has become a very important project in the field of fracture mechanics and rock mechanics. In this paper, based on the previous theoretical results of the failure criterion for brittle materials under compression, experiment study is implemented. The specimens are square plates and are made of cement, sand and water, and the cracks are made by using a very thin film (0.1 mm). The relations of material compressive strength versus crack spacing and the lateral confining stress are obtained from experimental results. The experimental results agree well with the failure criterion for brittle materials under compression, which indicates that the criterion is effective and applicable.

Hard and Soft: Principles of Polyner-Impregnated Concrete Using Elastomers

2013 ◽  
Vol 687 ◽  
pp. 118-123 ◽  
Author(s):  
Oliver Weichold ◽  
Udo Antons
Keyword(s):  
Plastic Deformation ◽  
Fracture Mechanics ◽  
Brittle Failure ◽  
Elastic Moduli ◽  
Domain Size ◽  
Glassy Polymers ◽  
Crack Deflection ◽  
Micro Cracks ◽  
Concrete Interface ◽  
Crystalline Matrix

The effect of incorporating elastomeric domains in concrete is described from the point of fracture mechanics. Concrete is subject to brittle failure, since cracks propagate at an enormous speed in the crystalline matrix. However, micro cracks are attracted to volume elements with lower elastic moduli such as elastomeric domains. Cracks that encounter the concrete-elastomer interface are stopped since energy is dissipated by plastic deformation of and/or crack deflection by the elastomer. The domain size and the distribution of the elastomer as well as, and properties of the elastomer-concrete interface are crucial parameters. Such a combination differs substantially from previously prepared polymer-impregnated concretes, in which only glassy polymers were used.

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