In many constructions, their elements are in contact with nominally matching (congruent) surfaces. reality, this is disturbed due to deviations the shape of these surfaces from nominal. To study effect perturbation on distribution pressure, analysis stress-strain state body system punched sheet-die carried out. The middle element deviates flat shape. This causes a change pressure distribution. ...

This work presents a finite element study of elasto-plastic hemispherical contact. The results are normalized such that they are valid for macro contacts (e.g., rolling element bearings) and micro contacts (e.g., asperity contact). The material is modeled as elastic-perfectly plastic. The numerical results are compared to other existing models of spherical contact, including the fully plastic c...

The authors have employed a numerical procedure to analyse the adhesive contact between a soft elastic layer and a rough rigid substrate. The solution to the problem, which belongs to the class of the free boundary problems, is obtained by calculating Green's function which links the pressure distribution to the normal displacements at the interface. The problem is then formulated in the form o...

A contact problem is considered in which an elastic half-plane is pressed against a rigid fractally rough surface, whose pro­ le is de­ ned by a Weierstrass series. It is shown that no applied mean pressure is su ̄ ciently large to ensure full contact and indeed there are not even any contact areas of ­ nite dimension|the contact area consists of a set of fractal character for all values of the ...

This study performed a quantitative validation on a recently developed pressure sensitive transducer system, the F-Scan sensor system. The results indicate that the sensor is adequate for determination of pressure distribution under contact conditions with soft materials. The linear response of the sensor was up to 1.7 MPa with good homogeneity throughout sensor cells. However, the sensor is se...

The present commentary refers to recent research on the plantar pressure distribution variation in pre-obese, obese and non-obese adult individuals. While the studies observe significant changes in the contact area in the mid foot region i.e. instep region, no statistically significant differences were observed in the pressure distribution of the fore-foot and hind-foot region among the pre-obe...