Order of characteristic at crack tip in problems of brittle-fracture mechanics of materials with initial stresses

1986 ◽  
Vol 22 (1) ◽  
pp. 20-25 ◽  
Author(s):  
A. N. Guz'
Keyword(s):  
Fracture Mechanics ◽  
Brittle Fracture ◽  
Crack Tip ◽  
Initial Stresses ◽  
Mechanics Of Materials ◽  
Brittle Fracture Mechanics

Evaluation of flexural fracture toughness for quasi-brittle structural materials using a simple test method

2002 ◽  
Vol 29 (4) ◽  
pp. 567-575 ◽  
Author(s):  
M.M Reda Taha ◽  
X Xiao ◽  
J Yi ◽  
N G Shrive
Keyword(s):  
Fracture Toughness ◽  
Fracture Mechanics ◽  
Brittle Fracture ◽  
High Performance ◽  
High Performance Concrete ◽  
Fibre Reinforced Concrete ◽  
Simple Test ◽  
Elastic Crack ◽  
Fracture Performance ◽  
Brittle Fracture Mechanics

As new structural concepts such as partial prestressing and steel-free bridge decks are more widely accepted and used, there is an increasing need for a reliable and reproducible fracture performance criterion that can describe resistance to crack growth. The required criterion should also be easy to determine experimentally so that it can be incorporated in structural specifications. The nonlinear behaviour of concrete and masonry materials suggested that quasi-brittle fracture mechanics approaches may be the most suitable for determining their fracture performance. The effective elastic crack model originally developed by Karihaloo and Nallathambi (1989) was modified to evaluate the critical crack depth under pure flexural stresses. A computer program was developed to calculate this depth iteratively from the experimental results. An experimental programme examining the fracture performance of four different structural materials (high performance concrete, mortar, fibre reinforced concrete, and masonry units) was carried out to examine the applicability of the model. As no post-peak data are required for the analysis, the model allows the use of a simple test setup to evaluate the fracture performance of quasi-brittle materials experimentally.Key words: fracture toughness, linear elastic fracture mechanics (LEFM), elastoplastic fracture mechanics (EPFM), quasi-brittle fracture mechanics, effective elastic crack, high performance concrete, masonry, fibre reinforced concrete.

Instability of deformations in brittle fracture mechanics problems

1977 ◽  
Vol 9 (5) ◽  
pp. 518-523
Author(s):  
S. D. Volkov ◽  
G. I. Dubrovina
Keyword(s):  
Fracture Mechanics ◽  
Brittle Fracture ◽  
Brittle Fracture Mechanics

Scale effects in brittle fracture mechanics

2014 ◽  
Vol 2014 (10) ◽  
pp. 800-806 ◽  
Author(s):  
S. A. Lur’e ◽  
P. A. Belov
Keyword(s):  
Fracture Mechanics ◽  
Brittle Fracture ◽  
Scale Effects ◽  
Brittle Fracture Mechanics

Study on Finite Element Model for Splitting Capacity of Bamboo Culms

2014 ◽  
Vol 494-495 ◽  
pp. 558-562
Author(s):  
Zhang Rong Zhao ◽  
Wan Si Fu ◽  
Jian Bo Zhou ◽  
Wang Han
Keyword(s):  
Finite Element ◽  
Optimal Design ◽  
Fracture Mechanics ◽  
Brittle Fracture ◽  
Finite Element Model ◽  
Element Model ◽  
Test Method ◽  
Engineering Significance ◽  
Bamboo Structure ◽  
Brittle Fracture Mechanics

For the problem of bamboo structure safety caused by bamboo culms splitting, the bamboo culms splitting capacity test method is studied, bamboo culms splitting capacity finite element model based on brittle fracture mechanics is proposed in the work. The results calculated by FEM are consistent with the experimental results, and the error is in 20% or less. The bamboo culms splitting capacity finite element model established above can provide supports for bamboo culms wide engineering applications. The developed model has theory and engineering significance for digital bamboo building optimal design.

Sign in / Sign up

Export Citation Format

Share Document