A number of magnetopause models have been developed in the course of last three decades. We have chosen seven of them and tested them using a fresh set of magnetopause crossings observed by Interball-1, Magion-4, and Geotail satellites. The crossings cover the magnetopause from the subsolar region up to near-Earth tail (XGSE ∼ −20 RE) and all geomagnetic latitudes. Our study reveals that (1) th...

The interlaminar interface of a crossply carbon fiber epoxy-matrix composite was found to be an impact sensor, with sensitivity to impact from 0.8 mJ to 5 J (though no indentation was observed) and to multiple (up to 35) impacts at the same energy. However, the sensing of a small impact after a large one was not effective if the small impact was much lower in energy than the large one. The high...

In this paper, static indentation and low velocity impact responses of a fully backed composite sandwich plate subjected to a rigid flat-ended cylindrical indenter/impactor are analytically investigated. The analysis is nonlinear due to nonlinear strain-displacement relation. In contrast to the existed analytical models for the indentation of composite sandwich plates, the stacking sequence of ...

The article is devoted to modification of the impact devices Leeb hardness testers for implementation dynamic instrumented indentation method. results obtained made it possible construct a load–displacement curve using primary EMF signals and determine values dissipated elastic body energy, maximal load indentation, residual penetration depth geometric parameters region, namely contact area ind...

We employ the Eshelby–Stroh formalism to study generalized plane strain infinitesimal deformations caused due to the indentation by a rigid circular cylinder of an elastic laminated plate with a throughthe-width rectangular void between two adjoining layers. Assuming that the void does not close during the indentation process, we find the indentation modulus (i.e., the slope of the indentation ...

ABSTRACT Soft materials, such as soft biological tissue and silicone rubber, are non-linear materials which require the classical uniaxial biaxial tensile testing methods for characterisation. Unfortunately, in special cases, tissue, samples smaller than 10 mm χ size these produce unwanted stress strain gradients due to fastening techniques associated with methods. Micro-indentation is proposed...

A new procedure for identifying the mechanical behavior of individual phases within a bi-material (matrix-particles) is presented. The case AlSi10Mg (large globularized Si-rich particles surrounded by an α-Al phase) processed additive manufacturing and post-treated taken as typical example. Grids nano-indentation tests are performed at different locations on nanocomposite using Berkovich indent...

ÐThe response of lead zirconate titanate and barium titanate piezoelectric ceramics to spherical microindentation was investigated. Force vs penetration depth curves obtained from instrumented indentation reveal that the indentation sti€ness depends on the material condition (i.e. poled vs unpoled) and the type of indentor (i.e. electrically conducting vs insulating). Good agreement was found b...

Non-linear quasi-static axisymmetric indentation problem is studied for comparitive computational analysis between elasto-plastic parameters and mechanical behaviour of homogeneous engineering metal materials. Mathematical model, based on deformation theory version of J2 theory, leads to quasi-static elasto-plastic contact problem with unknown contact domain, depending on the value of a indenta...