Evaluation of Biaxial Bending Strength in Damaged Soda-Lime Glass

2003 ◽  
Vol 17 (08n09) ◽  
pp. 1329-1334 ◽  
Author(s):  
Sang Yeob Oh ◽  
Hyung Seop Shin ◽  
Chang Min Suh
Keyword(s):  
Stress State ◽  
Bending Strength ◽  
Axial Stress ◽  
Brittle Materials ◽  
Soda Lime ◽  
Uniaxial Stress ◽  
Biaxial Stress ◽  
Bending Test ◽  
Ring Test ◽  
Soda Lime Glass

In applications of brittle materials such as soda-lime glass and ceramics, they are usually subjected to a multi-axial stress state. Brittle materials with cracks or damage caused by foreign impacts are apt to fracture abruptly from cracks because of their low fracture toughness. Depending upon the crack pattern developed, the strength using a multi-axial stress state might be different from the one using a uniaxial stress. As a result, when a small size crack was introduced by Vicker's indentation, the residual strength using a biaxial stress state obtained by the ball-on-ring test was greater than that using a uniaxial stress by the 4-point bending test. In the case of the specimens cracked by a spherical impact, there was overall decrease in the bending strength with increasing an impact velocity.

The Bending Strength of Brittle Materials and the Characteristics of the Elastic Wave Signal by Vickers Indentation

2004 ◽  
Vol 261-263 ◽  
pp. 1635-1640 ◽  
Author(s):  
Seok Hwan Ahn ◽  
Ki Woo Nam ◽  
Kotoji Ando
Keyword(s):  
Elastic Wave ◽  
Room Temperature ◽  
Bending Strength ◽  
Brittle Materials ◽  
Bending Test ◽  
Vickers Indentation ◽  
Three Point Bending ◽  
Wave Signal ◽  
Wave Detector ◽  
Fracture Wave

Four kinds of brittle materials were used to evaluate the bending strength under three-point bending and the characteristics of the elastic wave signal by Vickers indentation. The bending test was carried out under room temperature and high temperature. A crack was made at the tension side of the specimen with a Vickers indenter to investigate fracture strength. Fracture wave detector was used to evaluate characteristics of waveform and frequency of the elastic wave signal.

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.

scholarly journals Pseudo Stable Phenomenon of Crack Extension in Three Point Bending Test for Soda-Lime Glass.

1996 ◽  
Vol 45 (3) ◽  
pp. 310-315
Author(s):  
Hidetoshi KOBAYASHI ◽  
Masashi DAIMARUYA ◽  
Taketoshi NOJIMA
Keyword(s):  
Crack Extension ◽  
Soda Lime ◽  
Bending Test ◽  
Soda Lime Glass ◽  
Three Point Bending

Experimental Study on Cutting Performance in Micro-Grinding Hard Brittle Materials

2012 ◽  
Vol 565 ◽  
pp. 541-545
Author(s):  
Ya Dong Gong ◽  
Jun Cheng ◽  
Zhi Zheng Wu ◽  
Chao Wang ◽  
Jin Feng Zhang
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Surface Quality ◽  
Feed Rate ◽  
Brittle Materials ◽  
Soda Lime ◽  
Cutting Performance ◽  
Soda Lime Glass ◽  
Grinding Speed

The process of micro-grinding on hard brittle glass is shown in this paper, micro-grinding equipments are designed by tools of electroplated diamond, fz(feed rate), ap (grinding depth), vg(Grinding speed) in micro-grinding brittle materials and their effects to surface quality have been discussed. It has been demonstrated that low surface roughness could be achieved by high vg and low fz. The roughness of Soda-lime glass accomplished by fz:100μm/s, ap:30μm, vg:120000rpm in the experiment is about 78nm.

scholarly journals Effects of polyaxial stress state on static fatigue behavior of soda-lime glass.

1990 ◽  
Vol 56 (523) ◽  
pp. 513-517
Author(s):  
Kiyohiko IKEDA ◽  
Hisashi IGAKI ◽  
Yoshinobu TANIGAWA ◽  
Minoru TAMIAKI
Keyword(s):  
Stress State ◽  
Fatigue Behavior ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Static Fatigue

Fracture Toughness of Structural Ceramics Under Biaxial Stress State by Anticlastic Bending Test

1997 ◽  
Vol 119 (1) ◽  
pp. 7-14
Author(s):  
T. Ono ◽  
M. Kaji
Keyword(s):  
Stress State ◽  
Mixed Mode ◽  
Biaxial Stress ◽  
Bending Test ◽  
Mode I ◽  
Mode Ii ◽  
Mixed Mode Fracture ◽  
Pure Mode ◽  
Structural Ceramics ◽  
Biaxial Stress State

Mixed-mode fracture of structural ceramics under a biaxial stress state was investigated by an anticlastic bending test using the controlled surface flaw technique. The stress state of the anticlastic bending specimen is biaxial. This test enables the study of fractures under pure mode I, pure mode II, or any combination of mode I and mode II loading. To discuss the experimental results, a parameter “T” was introduced to the modified maximum hoop stress criterion. This parameter represents frictional effects of crack interfaces on the mixed-mode fracture and can be obtained experimentally. Relative magnitudes of mode I and mode II stress intensity factors and the directions of non-coplanar crack extension angles were predicted using the parameter “T.” Reasonable agreement with the experimental results was obtained.

The strength of fused quartz in water vapour

1965 ◽  
Vol 286 (1406) ◽  
pp. 390-401 ◽  
Keyword(s):  
Water Vapour ◽  
Bending Strength ◽  
Surface Reactions ◽  
Soda Lime ◽  
Load Application ◽  
Soda Lime Glass ◽  
Effect Of Water ◽  
Fused Quartz ◽  
Adsorption Of Water ◽  
Irreversible Nature

The effect of water vapour on the strength of fused quartz has been investigated by measuring the bending strength S , at 20 and 40 °C, of microscope cover slides in varying humidities ( p / p 0 ) relative to the bending strength in vacuo S 0 , and correlating this with the adsorption of water vapour on crushed slides at the same p / p 0 and temperatures. S / S 0 was found to vary with p / p 0 in the anomalous way previously observed for soda-lime glass. While an overall reduction in strength of about one-third occurred, a restoration in strength at intermediate pressures was observed at 20 °C. This restoration was not observed at 40 °C. These phenomena, combined with the reversible and irreversible nature of the adsorption of water vapour on the surface of the powder at the same p / p 0 , provided a means of interpreting the surface reactions between water and fused quartz. A model of these reactions is proposed which led to a prediction that a delay in failure with a further reduction in strength should be observed if the time of load application is increased from a few minutes to a number of hours. Subsequent experiments confirmed this prediction.

Surface Quality Effects Investigation of Micro-Grinding Soda-Lime Glass

2012 ◽  
Vol 251 ◽  
pp. 397-401
Author(s):  
Jun Cheng ◽  
Ya Dong Gong ◽  
Zhi Zheng Wu ◽  
Xu Qiang Yan ◽  
Wei Sheng Zheng
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Feed Rate ◽  
Brittle Materials ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Effective Factors ◽  
Grinding Speed ◽  
Micro Machine

This paper presents a micro-grinding experiment on soda-lime glass to study the surface quality effective factors during micro grinding on hard brittle materials. The process of micro-grinding on soda-lime glass is showed in this paper and micro-grinding equipments are designed, fz(feed rate), ap (grinding depth), vg(Grinding speed) in micro-grinding brittle materials and their effects to surface quality have been discussed by experiments which were carried out on a desktop micro machine developed by NEU. Results proved that fz is the most important factor to the surface quality, and low surface roughness could be achieved by high vg and low fz in micro-grinding soda-lime glass.

Sign in / Sign up

Export Citation Format

Share Document