Experimental investigation of the fracture toughness of NiAl bicrystals combined with computer simulations

1995 ◽  
Vol 192-193 ◽  
pp. 364-370 ◽  
Author(s):  
P. Ochmann ◽  
H. Vehoff
Keyword(s):  
Fracture Toughness ◽  
Experimental Investigation ◽  
Computer Simulations

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.

scholarly journals Experimental investigation of the Multipoint Ultrasonic Flowmeter

2018 ◽  
Vol 180 ◽  
pp. 02026
Author(s):  
Filipský Jakub
Keyword(s):  
Experimental Investigation ◽  
Vector Field ◽  
Velocity Field ◽  
Computer Simulations ◽  
Correlation Method ◽  
Ultrasonic Flowmeter ◽  
Ultrasonic Measurements ◽  
Parasitic Effects ◽  
Achievable Accuracy ◽  
Three Components

The Multipoint Ultrasonic Flowmeter is a vector tomographic device capable of reconstructing all three components of velocity field based solely on boundary ultrasonic measurements. Computer simulations have shown the feasibility of such a device and have been published previously. This paper describes an experimental investigation of achievable accuracy of such a method. Doubled acoustic tripoles used to obtain information of the solenoidal part of vector field show extremely short differences between the Time Of Flights (TOFs) of individual sensors and are therefore sensitive to parasitic effects of TOF measurements. Sampling at 40MHz and correlation method is used to measure the TOF.

scholarly journals Experimental investigation of fracture toughness for treated sisal epoxy composite

2018 ◽  
Vol 5 (1) ◽  
pp. 93-104
Author(s):  
Araya Abera Betelie ◽  
◽  
Yonas Tsegaye Megera ◽  
Daniel Telahun Redda ◽  
Antony Sinclair
Keyword(s):  
Fracture Toughness ◽  
Experimental Investigation ◽  
Epoxy Composite

Experimental Investigation of the Size Effects on the Fracture Toughness and Tearing Modulus

2008 ◽  
Vol 33-37 ◽  
pp. 35-40
Author(s):  
Zhao Xi Wang ◽  
Hui Ji Shi ◽  
Xiao Liang Zhang
Keyword(s):  
Fracture Toughness ◽  
Experimental Investigation ◽  
Transition Temperature ◽  
Size Effects ◽  
Stress Triaxiality ◽  
Stable Crack Growth ◽  
Plane Stress State ◽  
Brittle Transition ◽  
Brittle Transition Temperature ◽  
Ductile To Brittle Transition

Detailed experiments of fracture toughness in which SENB specimens of five different thicknesses were included were carried out to investigate the size effect in the ductile to brittle transition temperature region. It is found that the fracture toughness of the upper shelf increases with the thickness of the specimens with the similar geometry. While the fracture toughness of the lower shelf decreases with the thickness in the range of 4mm to 12mm and then drops up from 12mm to 16mm with the appearance of shear lips which present the shearing fracture under the plane stress state. The tearing modulus dJ/da which determines the resistance to stable crack growth increases with the increment of thickness and the reduction of the temperature. The results of the stress triaxiality increasing with the reduction of the thickness explain well the experimental results.

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