The Influence of Stress Ratio on the Fracture Behavior of Brittle Materials

2007 ◽  
pp. 937-940
Author(s):  
Wei Hong Li ◽  
Xiong Chen ◽  
De Shen Zhao ◽  
Yi Wang Bao
Keyword(s):  
Fracture Behavior ◽  
Stress Ratio ◽  
Brittle Materials

The Influence of Stress Ratio on the Fracture Behavior of Brittle Materials

2007 ◽  
Vol 353-358 ◽  
pp. 937-940
Author(s):  
Wei Hong Li ◽  
Xiong Chen ◽  
De Shen Zhao ◽  
Yi Wang Bao
Keyword(s):  
Stress State ◽  
Fracture Behavior ◽  
Stress Ratio ◽  
Process Analysis ◽  
Failure Process ◽  
Brittle Materials ◽  
Simulation Method ◽  
Critical Stress Intensity Factor ◽  
Complex Stress State ◽  
Biaxial Stress

The fracture behavior of brittle materials under different stress ratio has been investigated by means of numerical simulation method with software RFPA2D (Realistic Failure Process Analysis). The fracture dependence of brittle material on biaxial plane stress state was confirmed. The results show that the critical stress intensity factor under biaxial stress increases with the increase of biaxial stress ratio. The simulation tests reveal that the biaxial stresses have strong influence on the fracture properties of glass. The results confirmed that the strain criterion of fracture is feasible while brittle materials under complex stress state.

Effect of Microcracks on the Fracture Behavior in Brittle Materials

2002 ◽  
Vol 2002.2 (0) ◽  
pp. 195-196
Author(s):  
Yoshiaki AKINIWA ◽  
Keisuke TANAKA ◽  
Tomoyuki FUJII
Keyword(s):  
Fracture Behavior ◽  
Brittle Materials

Fracture Properties of Human Enamel and Dentin

1976 ◽  
Vol 55 (1) ◽  
pp. 154-164 ◽  
Author(s):  
Stephen T. Rasmussen ◽  
Robert E. Patchin ◽  
David B. Scott ◽  
Arthur H. Heuer
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Fracture Behavior ◽  
Brittle Materials ◽  
Dentinal Tubules ◽  
Fracture Properties ◽  
Human Enamel ◽  
Scanning Electron Microscope Fractographs ◽  
Work Of Fracture ◽  
Scanning Electron

Work of fracture measurements and scanning electron microscope fractographs show that both enamel and dentin can best be considered as brittle materials with anisotropic fracture properties. Enamel is highly anisotropic, with the weakest path of fracture parallel to the enamel rods. Dentin is less anisotropic, with easiest fracture perpendicular to the dentinal tubules. A model is proposed to explain the fracture behavior of enamel.

Plane Bending Fatigue in TIG and MIG Welds of Non-Combustible Magnesium Alloy

2020 ◽  
Author(s):  
Xuanyi Shao ◽  
Rafidah Binti Ismail ◽  
Yukio Miyashita
Keyword(s):  
Fatigue Strength ◽  
Fracture Behavior ◽  
Stress Ratio ◽  
Base Material ◽  
Test Results ◽  
Multiple Cracking ◽  
Bending Fatigue ◽  
Weld Defect ◽  
Strength Tests ◽  
Fatigue Fracture Behavior

Abstract Fatigue strength tests were carried out under plane banding loading with different stress ratio in Mg-Al-Ca-Mn alloy and its TIG and MIG welds. The welds showed lower fatigue strength compared to the base material. Weld defects were observed as fatigue crack origins in both TIG and MIG welds. It was speculated that difference in size of weld defect and multiple cracking occurred in MIG weld might affect fatigue strength characteristics in the welds. Effect of stress ratio on fatigue strength at 107 cycles was not significantly observed in fatigue test results obtained with different stress ratio in the base material and the welds. Scatter in size and distribution of weld defect could influence fatigue fracture behavior in the welds.

Influence of Stress Ratio on Fatigue Fracture Behavior of PBO Fiber with Kinking Damage

2017 ◽  
Vol 2017 (0) ◽  
pp. GS0803
Author(s):  
Toshiyuki KAGAWA ◽  
Yuki KAWANO ◽  
Noriyo HORIKAWA ◽  
Toshiro MIYAJIMA ◽  
Akira UENO ◽  
...  
Keyword(s):  
Fatigue Fracture ◽  
Fracture Behavior ◽  
Stress Ratio ◽  
Pbo Fiber ◽  
Fatigue Fracture Behavior

Influence of Zirconia Sol-gel Coatings on the Fracture Strength of Brittle Materials

2005 ◽  
Vol 20 (6) ◽  
pp. 1544-1550 ◽  
Author(s):  
Estíbaliz Sánchez-González ◽  
Pedro Miranda ◽  
Antonio Díaz-Parralejo ◽  
Antonia Pajares ◽  
Fernando Guiberteau
Keyword(s):  
Thin Film ◽  
Fracture Strength ◽  
Fracture Behavior ◽  
Weibull Modulus ◽  
Sol Gel ◽  
Brittle Materials ◽  
Fracture Properties ◽  
Major Increase

In this work, the effect of a sol-gel ZrO2–3 mol% Y2O3thin film on the fracture properties of a variety of brittle substrates was investigated. The results suggest that the film does not have any appreciable influence on the fracture behavior of crystalline substrates but dramatically affects the fracture properties of amorphous layers. In particular, a significant reduction of average fracture strength and a major increase of the Weibull modulus were observed on coated glassy slides. The origin of such variations is attributed to the generation of a homogeneous flaw population in the vitreous substrates, and the possible mechanisms for the production of flaws are analyzed. Implications of these results for the practical use of coated glassy layers are discussed.

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