Effects of Residual Stress and Loading Geometry on Single-Edge Precracked-Beam (SEPB) Fracture-Toughness Test Results

2004 ◽  
Vol 83 (10) ◽  
pp. 2625-2627 ◽  
Author(s):  
Scott Grendahl ◽  
Raymond Bert ◽  
Kyu Cho ◽  
Isa Bar-On
Keyword(s):  
Fracture Toughness ◽  
Residual Stress ◽  
Fracture Toughness Test ◽  
Test Results ◽  
Single Edge ◽  
Toughness Test

The Effects of Residual Stress, Loading, and Crack Geometry on SEPB Fracture Toughness Test Results

2001 ◽  
Vol 29 (3) ◽  
pp. 271 ◽  
Author(s):  
DR Petersen ◽  
RE Link ◽  
S Grendahl ◽  
R Bert ◽  
K Cho ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Residual Stress ◽  
Fracture Toughness Test ◽  
Test Results ◽  
Crack Geometry ◽  
Toughness Test

Experimental Investigation on Relative Crack Length For Fracture Toughness of Concrete

2010 ◽  
Vol 146-147 ◽  
pp. 1524-1528 ◽  
Author(s):  
Xue Zhi Wang ◽  
Zong Chao Xu ◽  
Zhong Bi ◽  
Hao Wang
Keyword(s):  
Fracture Toughness ◽  
Experimental Investigation ◽  
Crack Length ◽  
Fracture Toughness Test ◽  
Test Results ◽  
Toughness Test ◽  
Wedge Splitting Test ◽  
Splitting Test ◽  
Wedge Splitting

The wedge splitting test specimens with three series of different relative crack length were used to study the influences of relative crack length on the fracture toughness of common concrete. The suitable formulation for fracture toughness of concrete with different relative crack length was gotten on comparing between fracture toughness test results and computation results of the model developed from Hu formula.

Single Edge Precrack V-Notched Beam (SEPVNB) Fracture Toughness Testing on Silicon Nitride

2019 ◽  
Vol 962 ◽  
pp. 205-209
Author(s):  
Tjokorda Gde Tirta Nindhia ◽  
Tanja Lube
Keyword(s):  
Fracture Toughness ◽  
Silicon Nitride ◽  
Crack Size ◽  
Fracture Toughness Test ◽  
Single Edge ◽  
Razor Blade ◽  
Sintered Ceramic ◽  
Toughness Test ◽  
Toughness Testing ◽  
Diamond Paste

The previous Measurement of fracture toughness test by using bright indentation for precracked beam method (ASTM C1421) was found difficult to be carried out due to difficulty in precrack generation and measurement of the crack size. In this research single edge precrack V-notch beam (SEPVNB) is introduced as an alternative to solve the problem from previous standardized method. A real crack that can created with referred size is recognized as the best condition for fracture toughness test. The material prepared for this purpose was silicon nitride (Si3N4) produced by CeramTec (Plochingen, Germany) under the name SL200 B. It is a gas pressure sintered ceramic containing 3 wt.% Al2O3 and 3 wt.% Y2O3. The V Notch was prepared by using razor blade with diamond paste following ISO/FDIS 23146 standard preparation with more addition on precrack introduction. The precrack was introduced by so called opposite roller loading. The fracture toughness test was carried out by following procedure in ISO/FDIS 23146 . The result then was compared for validation with both single edge V-notch beam standard (ISO/FDIS 23146 ) and Surface crack in Flexure SCF (ASTM C 1421). The result of fracture toughness by using method that is introduce in this research is found 5.8270.275 MPa1/2 which is close to the result of SCF (5.335 0.222 MPa1/2). Meanwhile the value of fracture toughness by using V-notch beam is 4.9130.098 MPa1/2

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