Compression modulus

The high elastic modulus, compressive strength, and wear resistance of cemented carbides make them ideal candidates for use in boring bars, long shafts, and plungers, where reduction in deflection, chatter, and vibration are concerns. Metal, ceramic, and carbide powder-compacting dies and punches are generahy made of 6 wt % and 11 wt % Co ahoys, respectively. Another apphcation area for carbides is the synthetic diamond industry where carbides are used for dies and pistons (see Carbon). 

Reinforcing material Specific gravity Tensile Strength modulus Compressive strength, 10 psi Flexural strength, 10 psi Izod impact strength, ft-lb/in. Heat resistance continuous, Arc resistance,... 

A wide variety of tests is performed in TMA, which are adapted from physical tests that were used before the instrument became commonly available. These tests may also be modeled or mimicked in TMA, such as heat distortion (Fig. 9) and softening points. Methods to obtain the modulus, compressive viscosity, and penetrative viscosity have been developed. Many of these methods, such as ASTM D648 for example, will specify the stress the sample needs to be exposed to during the run. In D684, a sample is tested at 66 and 264 psi. Most TMAs on the market today have software available that allows them to generate stress—strain curves and to run creep—recovery experiments. Some are also capable of limited types of stress relaxation studies (for example a constant gauge length test " ). 

Eq 7. 36 was used to evaluate the effect of filler type and loading on rebound, modulus, compression. It also permits a comparison with the parameters which characterize moi phology. 

Orientation of fiber is detrimental to performance of composites which contain carbon fibers (Figures 11.16 and 11.17). T ensile strength of composites containing fibers oriented in a direction parallel to the surface is not affected by moisture content. Composites which have fibers oriented in a direction perpendicular to the surface, lose tensile strength as moisture increases (exception — carbon fiber/PEEK composite). Similar effects on tensile modulus, compression modulus and elongation have been observed. 

Elongation at yield Bending/ flexural strength Bending/ flexural modulus Compressive strength Izod... 

SWCNT Increasing compressive modulus, flexural modulus, compressive offset yield strength and flexural strength of polymer/SWCNT composites [53,54]... 

Fundamental mechanical properties of materials constitute the necessary data for designing any structure. Elasticity modulus, compressive strength, tensile strength and shear strength can be designated as fundamental mechanical properties. Their resistance to fatigue and permanent deformation can be characterised as mechanical performance. 

Modulus The ratio of stress to strain in a material over the range for which this value is constant. The type of modulus, which is measured, depends on the method of measurement, e.g., dynamic modulus, compressive modulus, elastic or tensile (Young s) modulus, shear modulus, torsion modulus, sonic modulus. 

Longitudinal—Young s modulus Shear—Rigidity modulus Compression—Bulk modulus Emulsion... 

Tensile strength at yield Tensile modulus Elongation at break Flexural strength Flexural modulus Compressive strength Compressive modulus Impact Notched Izod Unnotched Izod Chemical resistance... 

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