The ratio of softening temperature (glass transition temperature) to elastic modulus ( T g / E ) is mainly determined by the limiting elastic deformation of an interatomic bond, which characterizes the transition of a structural microregion from an elastic into a viscous-flow state. In silicate ...
The theory of rubber elasticity relates the elastic modulus of unfilled amorphous rubber to the concentration of elastically effective strands. A theoretical relation between this concentration and the concentrations of potential entanglements, random tetrafunctional crosslinks, and chain ends was proposed ...
It is well known that the modulus G = r/( - 2) varies with deformation, thus deviating from the predictions of statistical theories of rubber elasticity which require it to be constant. It has also been found that there is a nonnegligible energy contribution to the elastic force. It is ...
Measurement of hardness and elastic modulus by instrumented indentation: Advances in understanding and refinements to methodology 2004, Journal of Materials Research On the generality of the relationship among contact stiffness, contact area, and elastic modulus during indentation 1992, Journal of Materials...
results show that there is a good relation between the flexural strength and the elastic modulus.With this relation,the flexural strength of a graphite electrode can be calculated when the elastic modulus is known.Thus,the electrode quality and the production process can be monitored without ...
Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to ...
The theory of rubber elasticity relates the elastic modulus of unfilled amorphous rubber to the concentration of elastically effective strands. A theoretical relation between this concentration and the concentrations of potential entanglements, random tetrafunctional crosslinks, and chain ends was proposed ...
where R is the undeformed radius of curvature and E denotes the elastic modulus of a material. Employing these contact radii in the low and high speed cases discussed in the previous section gives the following equations for the average increase in contact temperature ...
Recently measurement of elastic wave velocity becomes a useful method to estimate Young's modulus and compressive strength of concrete and rock as non-destructive method. In order to confirm the relations among uniaxial compressive strength, propagation velocity of elastic waves and density, many soft...
The relationships between the fabric characteristics and stress and strain during cyclic shearing along various stress paths have been investigated through measurements of the low-amplitude dynamic shear modulus using a resonant column/torsional shear device [4], [5]. Measuring the elastic stiffness in...