Marius Marinel Stănescu

Experimental Determinations of the Eigenmodes for Sandwich Bars with Different Core Reinforced with Metal Fabric

In this paper, starting from the theoretical background of modal identification, it is established an experimental method used to determine the eigenmodes of some composite bars with the core made of polypropylene honeycomb and polystyrene reinforced with metal fabric. The single-point excitation method is used. This method has been widely used in modal tests and it consists in applying a force in a given point and recording the vibratory structure response in all interest points, including the excitation point. Although the single-point excitation requires a minimum of equipment, it needs a laborious analysis to perform extensive result processing in order to interpret the dynamic behaviour of the structure under test.

Advantages of Modular Radial Head Prosthesis Use in Highly Comminuted Fractures

This article aims to evaluate the results and outcomes of patients with highly comminuted radial head fractures, Mason III / IV type, treated surgically by arthroplasty with a cemented modular radial head prosthesis. A fracture of the radial head with a high degree of comminution left untreated can lead to complex functional impairment in which both elbow flexion and extension and also the pronation / supination of the forearm are limited, all of which will affect their daily activities. Management of radial head fractures should be based on both injury-specific factors and patient factors. Injury-specific factors include fracture size, displacement, rotation block, and associated injuries. Patient factors include age, associated injuries, bone quality, and activity level. Six patients underwent surgery for highly comminuted radial head fractures. All participants were followed up to 36 months postsurgery. A final review was carried out at 12-36 months after surgery when clinical, functional and imagistic assessment was performed. Functional results were very good; stability and ROM data obtained were within normal limits. Surgical treatment using modular radial head prosthesis offered excellent results, the elbow mobility being in the normal range and patients requiring a short period of recovery to achieve these parameters.

A note on Abel’s partial summation formula

Several applications of Abel’s partial summation formula to the convergence of series of positive vectors are presented. For example, when the norm of the ambient ordered Banach space is associated with a strong order unit, it is shown that the convergence of the series

Experimental determinations of the eigenmodes for composite bars made with carbon and Kevlar-carbon fibers

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The Damping Study for Dammar Composites Reinforced with Natural Fibers

∑xn implies the convergence in density of the sequence

A Comparison of Composite Bars against Metallic Bars from the Mass per Unit Length Point of View

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