scholarly journals Critical comparison of the boundary effect model with cohesive crack model and size effect law

2019 ◽  
Vol 215 ◽  
pp. 193-210 ◽  
Author(s):  
Christian Carloni ◽  
Gianluca Cusatis ◽  
Marco Salviato ◽  
Jia-Liang Le ◽  
Christian G. Hoover ◽  
...  
Keyword(s):  
Size Effect ◽  
Boundary Effect ◽  
Cohesive Crack ◽  
Crack Model ◽  
Cohesive Crack Model ◽  
Critical Comparison ◽  
Effect Model

scholarly journals Size Effect in Fracture of Concrete Specimens and Structures: New Problems and Progress

10.14311/608 ◽  
2004 ◽  
Vol 44 (5-6) ◽  
Author(s):  
Z. P. Bažant ◽  
Q. Yu
Keyword(s):  
Size Effect ◽  
Fracture Energy ◽  
Damage Model ◽  
Apparent Size ◽  
Shear Capacity ◽  
Cohesive Crack ◽  
Smooth Transition ◽  
Crack Model ◽  
Cohesive Crack Model ◽  
Nominal Strength

Presented is a concise summary of recent Northwestern University studies of six new problems. First, the decrease of fracture energy during crack propagation through a boundary layer, documented by Hu and Wittmann, is shown to be captured by a cohesive crack model in which the softening tail slope depends on the distance from the boundary (which causes an apparent size effect on fracture energy and implies that the nonlocal damage model is more fundamental than the cohesive crack model). Second, an improved universal size effect law giving a smooth transition between failures at large cracks (or notches) and at crack initiation is presented. Third, a recent renewed proposal that the nominal strength variation as a function of notch depth be used for measuring fracture energy is critically examined. Fourth, numerical results and a formula describing the size effect of finite-angle notches are presented. Fifth, a new size effect law derivation from dimensional analysis coupled with asymptotic matching is given. Finally, an improved code-type formula for shear capacity of R.C. beams is proposed. 

Eigenvalue analysis of size effect for cohesive crack model

1994 ◽  
Vol 66 (3) ◽  
pp. 213-226 ◽  
Author(s):  
Yuan-Neng Li ◽  
Zdeněk P. Bažant
Keyword(s):  
Size Effect ◽  
Cohesive Crack ◽  
Eigenvalue Analysis ◽  
Crack Model ◽  
Cohesive Crack Model

Parameter identification of a cohesive crack model by Kalman filter

2002 ◽  
Vol 191 (25-26) ◽  
pp. 2847-2871 ◽  
Author(s):  
G. Bolzon ◽  
R. Fedele ◽  
G. Maier
Keyword(s):  
Kalman Filter ◽  
Parameter Identification ◽  
Cohesive Crack ◽  
Crack Model ◽  
Cohesive Crack Model

Size effect research of tensile strength of bamboo scrimber based on boundary effect model

2020 ◽  
Vol 239 ◽  
pp. 107319
Author(s):  
Peng Xie ◽  
Wen Liu ◽  
Yucun Hu ◽  
Xinmiao Meng ◽  
Jiankun Huang
Keyword(s):  
Tensile Strength ◽  
Size Effect ◽  
Boundary Effect ◽  
Effect Model ◽  
Bamboo Scrimber

A penny-shaped cohesive crack model for material damage

2004 ◽  
Vol 42 (3) ◽  
pp. 303-316 ◽  
Author(s):  
G. Wang ◽  
S.F. Li
Keyword(s):  
Cohesive Crack ◽  
Crack Model ◽  
Material Damage ◽  
Cohesive Crack Model
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