scholarly journals Quantification of Influence of Epoxy Layer Between Interface Steel-Concrete on Calibration Curves for Modified Compact Tension Test

2017 ◽  
Vol 17 (2) ◽  
pp. 99-108
Author(s):  
Stanislav Seitl ◽  
Petr Miarka ◽  
Jakub Sobek
Keyword(s):  
Numerical Calculation ◽  
Calibration Curve ◽  
Compact Tension ◽  
Compact Tension Specimen ◽  
Tension Test ◽  
Tension Specimen ◽  
Evaluation Data ◽  
Fracture Properties ◽  
Calibration Curves ◽  
Compact Tension Test

Abstract The objective of this study is to investigate the use of compact tension specimen calibration curves for evaluation data of fracture properties measurement performed on modified compact tension specimen made from cement based composites. From literature, the well-known calibration curve for compact tension specimen is compared with calibration curves for Modified compact tension specimen that are obtained from numerical calculation. The obtained results are quantified and accuracy of solution is discussed. The suggested curves could be preferably used for determining of the fracture parameters.

scholarly journals Modified Disk-Shaped Compact Tension Test for Measuring Concrete Fracture Properties

2017 ◽  
Vol 11 (2) ◽  
pp. 215-228 ◽  
Author(s):  
Héctor Cifuentes ◽  
Miguel Lozano ◽  
Táňa Holušová ◽  
Fernando Medina ◽  
Stanislav Seitl ◽  
...  
Keyword(s):  
Compact Tension ◽  
Tension Test ◽  
Concrete Fracture ◽  
Fracture Properties ◽  
Compact Tension Test

Fracture Properties of Softwood under Mode I Loading Perpendicular to the Grain

2007 ◽  
Vol 340-341 ◽  
pp. 477-482
Author(s):  
Ming Bao Li ◽  
Jun Cao ◽  
Shi Qiang Zheng
Keyword(s):  
Stress Intensity Factor ◽  
Plastic Zone ◽  
Yield Criterion ◽  
Compact Tension ◽  
Tension Test ◽  
Mode I ◽  
Fracture Properties ◽  
Mode I Loading ◽  
Compact Tension Test ◽  
Shape And Size

Fracture properties of softwood under mode I loading perpendicular to the grain are studied in this paper. The stress intensity factor KIC in the R and L directions is measured by the compact tension test using small several specimens. The shape and size of plastic zone in crack tip is determined by numerical simulations based on von Hill yield criterion. The results show that anisotropic material constants do not affect the length of plastic zone along crack direction and it only operates on the plastic zone with θcr≠ 0. Strength ratios α1, α2 and toughness ratios r1, r2, influencing on the plastic zone, are discussed. Comparative analysis shows that r1 and r2 work markedly on the shape and size of plastic zone, whereas α1, α2 do less.

Influence of Sulfur Content on the Fracture Toughness Properties of 2 1/4 Percent Cr-1 Percent Mo Steel

1976 ◽  
Vol 98 (2) ◽  
pp. 135-142 ◽  
Author(s):  
J. F. Copeland
Keyword(s):  
Fracture Toughness ◽  
Sulfur Content ◽  
Detrimental Effect ◽  
Crack Opening ◽  
Analytical Techniques ◽  
Compact Tension ◽  
Compact Tension Specimen ◽  
Tension Specimen ◽  
Microvoid Coalescence ◽  
Opening Displacement

The effects of sulfur content on the fracture toughness properties of 2 1/4Cr-1 Mo steel were evaluated at test temperatures above, at, and below the nil ductility transition temperature (NDTT) of −23°C (−10°F). Small, 12.7-mm (0.5-in.) thick compact tension specimen results were combined with J-integral, Equivalent Energy, and Crack Opening Displacement analytical techniques to provide KIc results up to 22°C (72°F). It was found that the sulfur content of this steel has a large detrimental effect on KIc at the NDTT and above, where microvoid coalescence is the fracture mode. Sulfur has no significant effect at −73°C (−100°F) where cleavage occurs. These results also indicate that the higher Charpy V-notch energy at NDTT, shown by lower sulfur steels, is translatable into increased fracture resistance.

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