Dynamic tensile strength

Spall strength The dynamic tensile strength of a material associated with tension that results from the wave interaction of rarefaction waves. When the spall strength is exceeded, the material separates, or spalls. ... 

The more common type of spalling failure of concrete occurs when (and where) the transmitted compressive wave reflects from the free surface back face of the slab as a tensile wave, and the head of the reflected tensile wave and tail of the transmitted compressive wave combine to produce net tensile stress exceeding the dynamic tensile strength of the concrete. This process is shown schematically in Figure 21 for the simplified case of a plane, triangular compressive... 

PETN, LX-04-1, PBX 9404, PBX 9011 and RX-08-AZ were tested using the Hopkinson split-bar technique. This technique allows data acquisition up to strain rates of ca 5 x 103 in/in/sec. The " dynamic" tensile strength of these expls is ca four times greater than their "static" strength. 

Refs 1 and 3 give dynamic tensile strength compared to static strength (Table 2)... 

In the P-u plane we see that a tension is formed at the center of symmetry. If the tension exceeds the dynamic tensile strength (spall strength) of the material, then the material will fail and part at this plane. This is called spalling. The two rarefactions are dropping the shock pressure before they interact from Pi to zero. The Hugoniots of these two waves are the positive pressure Hugoniots. 

The applications of SFRC take advantage of the static and dynamic tensile strength, energy absorbing characteristics, toughness, and fatigue endurance of the composite [7], Uniform fiber dispersion provides isotropic strength properties. The applications include... 

Birkimer D. L., and Lindeman, R. A., Dynamic Tensile Strength of Synthetic Polyester Concrete, ASCE National Structural Engineering Meeting, Meeting Preprint, American Society of Civil Engineers, New York, 1157 1-12 (1970)... 

The test methods for determining dynamic tensile strength that are successful in comparatively homogeneous rock types cannot be used... 

In this paper, amodified SHPB technique and Brazilian test method is presented to test the dynamic tensile strength of coal, shale and sandstone rock samples. Totally four different kinds ofloading rate were tested to investigate the relationship between tensile strength and dynamic loading. Static test results are also presented for the comparison. 

Kubota, S., Ogata, Y, Wada, Y, Simangunsong, G., Shimada, H., Matsui, K. (2008). Estimation of dynamic tensile strength of sandstone. 

In die above equation, substituting the v with threshold level of PPV, dynamic tensile strength of rock is estimated. Confinement, the ratio of drilling depth and tunnel area, has been measined for every blast, because it has a significant impact on the overbreak (Dey, 2004). Similarly, Advance factor, the advancement achieved per unit drilling in a blast round i.e., the ratio of advance and drilling depth, has also been eomputed. 

DPPV=Threshold level of PPV for damage (m/s) = Dynamic tensile strength p = Poisson s ratio p = Rock density (g/cm )... 

Carbon nanotube Molecular dynamics Tensile strength Plasticity Adatoms Defects Electron transport... 

B. R. Breed, Charles L. Mader, and Douglas Venable, A Technique for the Determination of Dynamic Tensile Strength Characteristics , Journal of Applied Physics 3271 (1967). 

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