Ultimate compressive

Certain peculiarity was characteristic of each alloy studied. For example, any hydrogen content embrittled the non-alloyed titanium at room temperature. Other behavior was observed on the Ti-6A1-4.5V alloy at room temperature and low strain rates. The ultimate compressive strain of this alloy without hydrogen was about 8.5% at = 10 s while hydrogen alloying to r = 0.27 increased this value to about 20% and to 10 to 14% at other x. 

Compressive strength, or ability of a specimen to resist a crushing force, is measured by crushing a cylindrical specimen (ASTM-D-695) as shown in Figure 14.14. Here a sample of specified dimensions is placed between two heads, one movable and one set. Force is applied to the movable head moving it at a constant rate. The ultimate compression strength is equal to the load that causes failure divided by the minimal cross-sectional area. Since many materials do not fail in compression, strength reflective of specific deformation is often reported. 

If, as stated above, Pcr lOkbar, then the question arises how stresses of this magnitude can be generated by impact in explosive compacts whose compressive strengths are about 100 fold less than Pcr. For unconfmed explosive compacts (in Kholevo No 2) this can only occur with thin explosive compacts, ie with explosive layers whose h/EKrelation between, Ou> the ultimate compressive strength of the explosive compact the average stress, Fu, at which the compact fails via brittle fracture (in compression) is ... 

Fig. 16. Variation of ultimate compression stress (ac) with the test temperature for a novolac syntactic foam with carbon microspheres, apparent densities (1) 250 and (2) 200 kg/m3 181...

Fig. 19. Effect of exposure in corrosive environments on the ultimate compression stress for various syntactic foams. Key (A) initial samples, (B) gasoline, transformer oil, and isopropyl alcohol, (C) carbon tetrachloride, (D) 10 % sulphuric acid, (E) 10 % alkali. Exposure duration EDS for 12 months in each medium, SPS for 6 months in each medium, EDM for 12 months in C, D, and E, 6 months inB2 ...

Fig. 20. Calculated and experimental (dotted and solid curves respectively) values of (1) elastic modulus (E) and (2) ultimate compression strength (crj versus phenolic microsphere concentration (C) in an epoxy syntactic foam at 23 °C 162)...

The addition of particulate fillers generally decreases compression fatigue, but increases ultimate compressive modulus and compressive yield strength, because of a stiffening effect. Compressive strength as a function of filler loading is shown for a cured epoxy formulation in Fig. 9.7. 

Variation of strain over the compression region up to failure for the beams was found to be almost perfectly linear. Failure occurred when the ultimate compressive strain in the PC reached a value of at least 0.005. As the beams failed, the compressive concrete piece separated as a V-shape, a phenomenon already observed before with other steel-reinforced PC systems. 

The ultimate compressive strength of furfurol-acetone polymer concrete control samples is 65 MPa. The most intensive decrease in the strength of the samples stored in environments with humidity of 50% to 60% and 86% to 96%, starts with 110 days (Figure 1.6). 

It is apparent that a water environment is a limiting case. As this takes place, the ultimate compressive strength and the module of elasticity of polymer concrete samples decreased accordingly, up to 44,000 and 63,000 MPa. 

FIGURE 1.6 Dependence of ultimate compressive strength of furfurol-acetone polymer concrete samples on exposition time at humidity of environment 1 50%-60%, 2 85%-95%, 3 water immersion. (From Yu. Borisov, Yu. Potapov, O. Figovsky, D. Beilin, Water Resistance of the Polymer Concretes, /. Scientific Israel Advanced Technology 14, no. 3 (2012) 84-91. With permission.)... 

The ultimate compressive strength of drying epoxy polymer concrete samples is about 92% of the control sample strength, which testifies to a high degree of reversibility of the process associated with the adhesive nature of the interaction between binder and filler. 

The ultimate compressive strength of the RubCon samples is 94.8 MPa. It is shown in Figure 1.9 that the strength of the concrete samples decreases moderately regardless of the environment s humidity. After a 50-day exposure, the strength limit stabilizes and remains unchanged until the end of the test. This can be explained by low water absorption of the rubber polymer concrete, not exceeding 0.05%. 

FIGURE 2.8 Influence of negative temperatures on the ratio of the module of elasticity (1), ultimate compression strength (2), and ultimate deformations at compression (3) to the similar values obtained at test of control RubCon samples at room temperature. (Reprinted from Yu. Potapov, O. Figovsky, Yu. Borisov, V. Chmyhov, and D. Beilin, Influence of Temperature on Physical-Mechanical Characteristics of Polymer Concrete, J. Scientific Israel Technological Advantages 5, nos. 1-2 (2003) 11-13.)... 

An increase in temperature from 20°C up to 50°C has a small effect on RubCon. At a further increase in temperature, it was possible to expect substantial growth of ultimate deformations along with a simultaneous drastic decrease in ultimate compressive strength and modulus of elasticity. At the maximum positive temperature of 80°C, deformability of RubCon increases 2.5 times, ultimate strength is reduced by 40%, the modulus of elasticity decreases by 50%. At rise in temperature the part of an elastic-plastic phase transfers to viscous thus, highly elastic and viscous deformations develop and produce increases in RubCon deformability, and decreases in its ultimate compressive strength and the module of elasticity. 

Ultimate Compressive Strength of SPC versus Additive Type and the Corrosion Environment... 

Beam Series Concrete Grade Coating Thickness (mm) Ultimate Compression Stress G (MPa) Ultimate Bending Moment Mp (Nm)... 

Profile Ratio between rice hulls and Biodac in the formulation (%) Board base area (in. ) Ultimate compressive load (lb) Compressive strength (psi)... 

Safe bearing load on concrete (lbs,/sq. in.). Ultimate compressive strength (Ibs./sq. in.) Safe unit stress in extreme fiber of concrete... 

Tissue failure studies are based on cadaver tissue strength. Generally, the research has focused on the ultimate compressive strength of the lumbar spine. Studies and literature reviews by Brinck-mann et al. (1989) and lager and Luttmann (1991) indicate that the ultimate compressive strength of... 

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