Effect of Characteristic Lengths of Fracture on Thermal Crack Patterns

Journal Reference

International Journal of Geomechanics, Volume 15, Issue 4 (2015).

Aruna L. Amarasiri1 , Jayantha K. Kodikara2

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  1. Research Assistant, Dept. of Civil Engineering,Monash Univ., Victoria 3800, Australia (corresponding author). E-mail: [email protected]
  2. Associate Professor, Dept. of Civil Engineering,Monash Univ., Victoria 3800, Australia. E-mail: [email protected]
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Abstract

Approximately uniformly spaced cracking occurs in many different materials and processes during thermal or drying shrinkage. Such cracks may occur when a slab of material restrained at the bottom is subjected to a sudden reduction in temperature at the top. Previous research indicates that the crack patterns obtained depend on the Griffith crack length for a shrinking solid. This paper shows that for materials exhibiting elastic-plastic fracture behavior, the fracture energy, Young’s modulus, and tensile strength in combination form a second characteristic length of fracture of the material that has a significant impact on the cracks formed.

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Characteristic Lengths of Fracture on Thermal Crack Patterns- advances in engineering

 

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