Elastic Characteristics Of Material Research Articles

Ambiguity of temperature dependences for the elastic characteristics of materials with nickel and germanium as examples

Experimental data are presented for precise measurements of longitudinal ultrasonic wave propagation rate in single-crystal germanium and polycrystalline nickel. With these materials as examples the existence of ambiguity is demonstrated in values of elastic characteristics in successive cycles of thermal exposure, i.e., temperature ranges in which the material does not undergo phase transformation.

Effect of porosity on the elastic characteristics of materials based on silicon nitride

Effect of porosity on the elastic characteristics of materials based on silicon nitride

Effect of the geometric parameters and of the elastic characteristics of materials on the durability of valves in pumps for liquified gases

1. To improve the durability of valves of high-pressure pumps, the geometric parameters of the valves have to be determined with a view to the condition that plastic deformations at the place of contact between the mushroom and the seat are impermissible. 2. When the conditions of expression (6) are fulfilled, then the best hydraulic characteristics will be found in the valve in which the material of the mushroom is the titanium alloy VT5-1, and the material of the seat is steel 20Kh13.

Determination of certain elastic characteristics of materials with the use of parabolic interpolation of strain curves

Determination of certain elastic characteristics of materials with the use of parabolic interpolation of strain curves

Composite materials reinforced with a system of three straight, mutually orthogonal fibers

An extension of existing methods of calculating fibrous composites to the case of reinforcement in three mutually perpendicular directions is presented. The basic approach involves the introduction of a "modified" matrix, the properties of which are determined in terms of the elastic moduli of the binder and the reinforcement coefficient in one of the three directions. Approximate expressions are obtained for the elastic characteristics of materials with a high-modulus reinforcing phase. There is a considerable increase in the transverse modulus by comparison with the shear modulus, even for a low reinforcement coefficient in the third direction.