Experimental Study on Direct Tensile Behavior of Concrete under Various Loading Regimes

2016 ◽  
Vol 113 (4) ◽  
Author(s):  
Xudong Chen ◽  
Jingwu Bu
Keyword(s):  
Experimental Study ◽  
Tensile Behavior ◽  
Direct Tensile

Experimental study on tensile behavior of blind bolt

ce/papers ◽  
2021 ◽  
Vol 4 (2-4) ◽  
pp. 100-109
Author(s):  
Yunhan Jiang ◽  
Guoqiang Li ◽  
Chen Chen ◽  
Ce Wen ◽  
Sixian Zhang
Keyword(s):  
Experimental Study ◽  
Tensile Behavior

scholarly journals A numerical and experimental study on the tensile behavior of plasma shocked granite under dynamic loading

2017 ◽  
Vol 50 (2) ◽  
pp. 41-62
Author(s):  
Ahmad Mardoukhi ◽  
Timo Saksala ◽  
Mikko Hokka ◽  
Veli-Tapani Kuokkala
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Mechanical Behavior ◽  
Thermal Shock ◽  
Dynamic Loading ◽  
Split Hopkinson Pressure Bar ◽  
Tensile Behavior ◽  
Brazilian Disc ◽  
Brazilian Disc Test ◽  
Plasma Shock

This paper presents a numerical and experimental study on the mechanical behavior of plasma shocked rock. The dynamic tensile behavior of plasma shock treated Balmoral Red granite was studied under dynamic loading using the Brazilian disc test and the Split Hopkinson Pressure Bar device. Different heat shocks were produced on the Brazilian disc samples by moving the plasma gun over the sample at different speeds. Microscopy clearly showed that as the duration of the thermal shock increases, the number of the surface cracks and their complexity increases (quantified here as the fractal dimension of the crack patterns) and the area of the damaged surface grows larger as well. At the highest thermal shock duration of 0.80 seconds the tensile strength of the Brazilian disc sample drops by approximately 20%. In the numerical simulations of the dynamic Brazilian disc test, this decrease in tensile strength was reproduced by modeling the plasma shock induced damage using the embedded discontinuity finite element method. The damage caused by the plasma shock was modeled by two methods, namely by pre-embedded discontinuity populations with zero strength and by assuming that the rock strength is lowered and conform to the Weibull distribution. This paper presents a quantitative assessment of the effects of the heat shock, the surface microstructure and mechanical behavior of the studied rock, and a promising numerical model to account for the pre-existing crack distributions in a rock material.

Evaluation of the Direct Tensile Behavioral Characteristics of UHPC Using Twisted Steel Fibers

2012 ◽  
Vol 602-604 ◽  
pp. 96-101 ◽  
Author(s):  
Gum Sung Ryu ◽  
Si Hwan Kim ◽  
Gi Hong Ahn ◽  
Kyung Taek Koh
Keyword(s):  
Small Proportion ◽  
Mechanical Characteristics ◽  
Steel Fiber ◽  
Tensile Behavior ◽  
Steel Fibers ◽  
Superior Performance ◽  
Behavioral Characteristics ◽  
Straight Fiber ◽  
Direct Tensile ◽  
Twisted Fiber

This paper investigates the improvement of the toughness of UHPC through the use of conventional straight steel fibers and twisted fibers. The conventional straight steel fiber has length of 13 mm and diameter of 0.2 mm. Besides, twisted fibers with diameters of 0.2 mm, 0.22 mm and 0.3 mm, respective lengths of 20 mm, 22 mm and 30 mm and made of high elastic steel fibers with aspect ratio (l/d) of 100 are used at volume fractions of 1%, 1.5% and 2%. The results of the examination of the direct tensile behavior reveal the occurrence of strain hardening after early cracking. K-UHPC using twisted fiber exhibits significantly improved mechanical characteristics compared to UHPC using conventional straight fiber. Equivalent or superior performance is developed when small proportion of about 0.5% of steel fiber is adopted and 90% of the performance is developed when small proportion of approximately 1.0% of fiber is admixed. Consequently, the use of twisted fiber in K-UHPC opens the possibility to achieve economically efficient fabrication by enabling significant reduction of the amount of fiber.

Experimental study on direct tensile behaviour of UHPFRC under high strain-rates

2019 ◽  
Vol 218 ◽  
pp. 667-680 ◽  
Author(s):  
Ezio Cadoni ◽  
Daniele Forni ◽  
Emmanuel Bonnet ◽  
Svatopluk Dobrusky
Keyword(s):  
Experimental Study ◽  
High Strain ◽  
Tensile Behaviour ◽  
Strain Rates ◽  
High Strain Rates ◽  
Direct Tensile
Sign in / Sign up

Export Citation Format

Share Document