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ANISOTROPIC DAMAGE MODEL FOR IMPACTED CERAMIC MATERIAL: APPLICATION TO SILICON CARBIDE

โœ Scribed by PASCAL RIOU; CHARLES E. COTTENOT; MICHEL BOUSSUGE

Book ID
104344204
Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
457 KB
Volume
21
Category
Article
ISSN
0734-743X

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โœฆ Synopsis

The anisotropic damage model for impacted ceramics, which is here proposed, is based on experimental observations of the damage propagation. Crack initiation occurs when a principal tensile stress exceeds a threshold value and propagation takes place in plane perpendicular to the stress direction. The damage propagation is linked to the Young's modulus decrease in each direction. Crack and multicracked-zone propagation velocities are assessed by using a high-speed camera. This model allows to predict the orientation of different cracks and therefore takes into account the anisotropic nature of damage.

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โœ Z.G. Wei; R.C. Batra ๐Ÿ“‚ Article ๐Ÿ“… 2007 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 287 KB

We use Bai's conservation equation for cracks, and Rice and Tracey's equation for the growth of a spherical void in an infinite medium to derive an evolution equation for damage in an anisotropic material. It is then used to delineate the instability strain in a thin anisotropic sheet deformed in a