Stress modulus

Because of the simplicity of the first test method, most of the comparisons are made usiag this technique. The effects of the aging process are usually measured on tensile properties such as tensile strength, elongation, and stress (modulus) at 300% elongation (42). [Pg.247]

The appropriate figure for stress, modulus etc. is taken from the creep curve or a derivative curve. This is then inserted into the formula. [Pg.201]

Figure 18.1 is the typical stress-strain curves of the filled rubber (SBR filled with fine carbon black, HAF),

$Figure 18.1 is the typical stress-strain curves of the filled rubber (SBR filled with fine carbon black, HAF), <p the volume fraction of carbon black, showing the above three criteria from 1 to 3. The most characteristic point in stress-strain relation of the filled rubber is first, that the stress increase becomes larger and larger as extension increases (called the stress upturn), in addition to the initial stress (modulus) increase at small extension. Second, the tensile strength is 10-15 times larger than that of the unfilled rubber vulcanizate whose strength is in the order of 2 or 3 MPa ( = 0 in Figure 18.1). Moreover, the tensile strain is also quite large, compared with the unfilled rubber of the same modulus, as shown in Figure 18.1.$

G dynamic stress modulus, storage modulus G dynamic strain modulus, loss modulus. [Pg.249]

Figure 9. Schematic test site for measurement of residual stress, modulus, tensile stress, and adhesion of polyimide.

Conditions Specimen Tensile strength Yield stress Modulus Strain at break Weight increase... [Pg.895]

Stress Modulus Elongation Stress Modulus Notched Unnotched... [Pg.172]

Sample Stress (MPa) Modulus (MPa) Elongation (%) Stress Modulus (MPa) (MPa) Notched am Unnotched (J/M) Glass length (microns)... [Pg.173]

Sample identifi- cation Resin Fiber volume, % Void volume, % Corrected outer fiber ultimate stress Modulus of elasticity Elongation, %... [Pg.265]

Buckling analysis Critical stress Modulus (compressive, tensile, secant) Poisson s ratio Compression strength Tfensile stress at 5deld... [Pg.894]

The maximum allowable diametral interference between a shaft and a hub for press-fitting assembly is a function of part geometry, stress, modulus of elasticity of shaft and hub, and Poisson s ratio for shaft and hub materials. When the shaft and hub are made of the same material, the moduli of elasticity are the same and Poisson s ratio is the same for the shaft and hub, simplifying the equation for maximum diametral interference. Calculating diametral interference is simplified when the shaft is made of high-modulus material. [Pg.31]

Materials Compressive Tensile strength f 2s strength (MPa) (MPa) fc28 ft28 Young s Stress modulus intensity (GPa) factor (MFa.m ) Specific fracture energy y (Jim)... [Pg.465]

The in-use performance and handling of agglomerated or tabletted products is often closely related to structure (e.g., porosity) and mechanical properties (hardness, yield stress, modulus, toughness, etc.). The compaction diagram is a useful method to measure the properties of granular materials as well as the characterization of bulk structures (e.g., tablets) formed by compaction. [Pg.117]

Figure4.4.1 shows the shear stress modulus G y, 0 = fn/y as a function of time after imposition of a step shear strain for a commercial low density polyethylene. This particular batch of...

At small strains y 0, so G(y, t) must reduce to the linear viscoelastic modulus G(/), and h y) must approach unity for small y. Note also in Figure 4.4.1 that the normal stress modulus N /y equals the shear stress modulus xn/y this implies that melt I obeys the Lodge-Meissner relationship, eq 4.2.8. Note that this relation follows directly from eqs. 4.4.4 and 4.4.5. [Pg.160]

We skip the steps whereby the stress modulus (that part attributable to the polymer) is written in terms of the normal modes and averaged, and content ourselves with the resulting formula... [Pg.162]

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