Biaxial Fracture Behavior of Polycrystalline Alumina

2005 ◽  
Vol 475-479 ◽  
pp. 1329-1332
Author(s):  
Masayuki Tsukada ◽  
Eiichi Sato ◽  
Kazuhiko Kuribayashi
Keyword(s):  
Fracture Toughness ◽  
Mixed Mode ◽  
Fracture Behavior ◽  
Mixed Mode Fracture ◽  
Polycrystalline Alumina ◽  
Mode Fracture ◽  
Multiaxial Stress State ◽  
Four Point Bending ◽  
Biaxial Tests ◽  
Fracture Tests

Fracture behavior under multiaxial stress state of polycrystalline alumina was studied from the view point of an artificial crack propagation and fracture from a natural flaw. The former was studied by mixed-mode fracture toughness tests; asymmetric four-point bending and diametral compression techniques were carried out using precracked and notched specimens. The latter was studied by biaxial fracture tests in compression and torsion loading; multiaxial fracture statistics was applied to the measured fracture envelope. The ratio KIIC/KIC obtained from the biaxial tests was higher than that obtained by the mixed-mode fracture toughness tests. It revealed that the fracture from an artificial flaw does not simulate the fracture from a naturall flaw in polycrystalline ceramics.

Evaluation of size effect on mixed-mode fracture behavior of epoxy/silica nanocomposites

2017 ◽  
Vol 52 (4) ◽  
pp. 239-248 ◽  
Author(s):  
Ahmad Ghasemi-Ghalebahman ◽  
Javad Akbardoost ◽  
Yaser Ghaffari
Keyword(s):  
Fracture Toughness ◽  
Tangential Stress ◽  
Mixed Mode ◽  
Fracture Behavior ◽  
Process Zone ◽  
Maximum Tangential Stress ◽  
Mixed Mode Fracture ◽  
Mode Fracture ◽  
Stress Criterion ◽  
Maximum Tangential Stress Criterion

The aim of this study was to examine the effect of size on the mixed-mode fracture toughness of quasi-brittle nanocomposites with the help of modified maximum tangential stress criterion. The literature reveals that the effect of size on mixed-mode fracture behavior of brittle nanocomposites has not been well investigated previously using modified maximum tangential stress criterion. The studied nanocomposites were made of epoxy resin reinforced with 7 wt%, 20–30 nm nanosilica. The accuracy of the method was assessed by taking into account the high-order terms of Williams series expansion along with finite element over-deterministic method. To investigate the effect of size on fracture toughness, a number of three-point semi-circular bending tests with different radii and four angles of edge–crack orientation were conducted and subjected to mixed-mode loading. The size of fracture process zone and apparent fracture toughness ( Kc) were also evaluated as a function of sample size. Experimental results showed that the proposed approach can accurately predict the fracture behavior of studied nanocomposites.

Mixed-Mode Fracture of Hybrid Material Bonded Interfaces under Four-Point Bending

2011 ◽  
Vol 24 (2) ◽  
pp. 218-226 ◽  
Author(s):  
Pizhong Qiao ◽  
Fangliang Chen ◽  
Cole S. Hamey ◽  
Jialai Wang
Keyword(s):  
Hybrid Material ◽  
Mixed Mode ◽  
Mixed Mode Fracture ◽  
Mode Fracture ◽  
Four Point Bending

Mixed mode fracture toughness: An empirical formulation for determination in asymmetric DCB specimens

2010 ◽  
Vol 32 (11) ◽  
pp. 3699-3703 ◽  
Author(s):  
V. Mollón ◽  
J. Bonhomme ◽  
J. Viña ◽  
A. Argüelles
Keyword(s):  
Fracture Toughness ◽  
Mixed Mode ◽  
Mixed Mode Fracture ◽  
Mode Fracture

Mixed mode fracture behavior of short-particle engineered wood

2021 ◽  
pp. 103054
Author(s):  
Ehsan Torabi ◽  
Saeid Ghouli ◽  
Majid R. Ayatollahi ◽  
Liviu Marsavina
Keyword(s):  
Mixed Mode ◽  
Fracture Behavior ◽  
Mixed Mode Fracture ◽  
Mode Fracture ◽  
Engineered Wood

Mixed-mode fracture behavior of 3D-printed PLA with zigzag filling

2020 ◽  
pp. 1-8
Author(s):  
Ahmet Refah Torun ◽  
Ege Can Yıldız ◽  
Şeyma Helin Kaya ◽  
Naghdali Choupani
Keyword(s):  
Mixed Mode ◽  
Fracture Behavior ◽  
Mixed Mode Fracture ◽  
Mode Fracture ◽  
3D Printed
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