Determination of the fracture properties of metallic materials using pre-cracked small punch tests

2014 ◽  
Vol 38 (1) ◽  
pp. 104-112 ◽  
Author(s):  
J. M. Alegre ◽  
I. I. Cuesta ◽  
H. L. Barbachano
Keyword(s):  
Metallic Materials ◽  
Fracture Properties ◽  
Small Punch

Determination of Mechanical Properties of Metallic Materials from Very Small Volumes by Means of Small Punch Test

2017 ◽  
Vol 741 ◽  
pp. 116-121
Author(s):  
Petr Dymáček ◽  
Ferdinand Dobeš ◽  
Luboš Kloc
Keyword(s):  
Mechanical Properties ◽  
Stress Relaxation ◽  
Metallic Materials ◽  
Small Punch Test ◽  
Test Setup ◽  
Small Punch ◽  
Punch Test ◽  
Static Fracture

The paper summarizes capabilities of the small punch tests on miniature disc specimens from metallic materials. Results obtained by small punch tests can be correlated with mechanical properties determined by conventional or other miniature tests. Three basic types of small punch test setup: i) static/fracture, ii) creep and iii) stress relaxation are described and the basic quantities that can be obtained are shown. Relations for an assessment of conventional mechanical properties from quantities obtained by small punch test are presented.

scholarly journals Effects Of Specimen Size And Crack Depth Ratio On Calibration Curves For Modified Compact Tension Specimens

2015 ◽  
Vol 15 (2) ◽  
Author(s):  
Stanislav Seitl ◽  
Viliam Viszlay ◽  
Hector Cifuentes ◽  
Alfonso Canteli
Keyword(s):  
Crack Depth ◽  
Accurate Determination ◽  
Crack Propagation Rate ◽  
Compact Tension ◽  
Propagation Rate ◽  
Metallic Materials ◽  
Fracture Properties ◽  
Crack Depth Ratio ◽  
Ct Test

Abstract The compact tension (CT) test is frequently used to determine fracture properties of metallic materials, such as fracture energy, fracture toughness, crack propagation rate and J-R curves. In the case of cement based composites, a modified compact tension (MCT) specimen can be advantageously used due to the negligible stress concentration arising around the pulling dowel pins during the test. In this work, finite element calculations are used to determine the calibrations curves for the stress intensity factor K, COD, CMOD and CMOD(4), needed for an accurate determination of the fracture parameters, as a function of the ratio a/W. Nominal diameters are selected according to the used core bits between 50 mm and 300 mm.

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