Dynamic hardness and storage modulus

What is the difference between storage modulus and hardness?

Storage modulus or elastic modulus is an intrinsic material property and fundamentally related to atomic bonding. Hardness is an engineering property and for some materials can be related to yield strength. A higher storage modulus does not guarantee a higher hardness value.

What is the difference between storage modulus and dynamic loss modulus?

The storage modulus is often times associated with “stiffness” of a material and is related to the Young’s modulus, E. The dynamic loss modulus is often associated with “internal friction” and is sensitive to different kinds of molecular motions, relaxation processes, transitions, morphology and other structural heterogeneities.

What is dynamic hardness?

Dynamic hardness provides a direct quantitative measure of the resistance of metals to plastic deformation .

What is the storage modulus and loss modulus of syntactic foam?

The storage modulus and loss modulus determined in a DMA experiment measure the capacity of a material to store and dissipate energy, respectively. In general, the storage modulus of syntactic foams decreases with increasing temperature. This response was consistent between plain and reinforced syntactic foams.

What is a dynamic modulus of a polymer?

These properties may be expressed in terms of a dynamic modulus, a dynamic loss modulus, and a mechanical damping term. Typical values of dynamic moduli for polymers range from 106-1012 dyne/cm2 depending upon the type of polymer, temperature, and frequency.

What are dynamic mechanical properties?

Dynamic mechanical properties refer to the response of a material as it is subjected to a periodic force. These properties may be expressed in terms of a dynamic modulus, a dynamic loss modulus, and a mechanical damping term.