Here, a strain gauge is glued into the range of homogeneous strain
in the shank.
The optimization indicates that a proper value of stage thickness is needed to balance the requirements of (1) strain concentration and (2) homogeneous strain
distribution in gauge section.
The phenomenological approach is based on the observation of rubber under various conditions of homogeneous strain
and is concerned with fitting mathematical equations to experimental data.
Non-crosslinked PA12 and PA12, 4% MB, 15 kGy, exhibit mainly similar strain distributions, whereas strongly crosslinked PA12, 12% MB, 66 kGy, shows a more homogeneous strain
In order to investigate the appropriateness of the proposed forms of the strain energy density, several experimental results for incompressible materials under homogeneous strain
were investigated in which the predictions of the proposed model showed very good agreement.
The main difficulty is to keep a homogeneous strain
field in the specimen during the compression test.
The mechanical properties of a perfectly elastic material may conveniently be represented in terms of the strain energy function w, per unit volume for a pure homogeneous strain
of the most general type, defined by principal extension ratios [[lambda].
This study showed that the inverse method, used to estimate the material parameters, is a good alternative to the direct identification, especially sin ce the latter often requires homogeneous strain
state, which is very difficult to obtain.
It is quite straightforward to derive analytical expressions for both [micro] and K by imposing a uniform shear or pressure on the composite and solving for the resulting homogeneous strain
in the inclusion: applicable only to the dilute case.