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buletinul institutului politehnic din iaşi bulletin of the polytechnic ...

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FINITE ELEMENT MODELING OF A KNEE AND<br />

HIP REHABILITATION EQUIPMENT<br />

by<br />

IOANA PETRE, TUDOR DEACONESCU, ANDREA DEACONESCU<br />

and DAN PETRE<br />

Abstract. In this paper it is presented <strong>the</strong> finite element<br />

modeling <strong>of</strong> rehabilitation equipment for <strong>the</strong> knee and hip<br />

affections using CATIA V5R19 S<strong>of</strong>tware. It is presented <strong>the</strong><br />

equipment to be analyzed, <strong>the</strong> material, type <strong>of</strong> analysis, <strong>the</strong><br />

constraints and <strong>the</strong> loads applied. After analyze is made, <strong>the</strong> s<strong>of</strong>t<br />

shows <strong>the</strong> results, which are interpreted. The results <strong>of</strong> <strong>the</strong> analysis,<br />

Von Missed stresses and displacements show <strong>the</strong> resistance <strong>of</strong> <strong>the</strong><br />

equipment under loa<strong>din</strong>gs conditions.<br />

Key words: rehabilitation equipment, Finite Element<br />

Modeling, CATIA.<br />

SOME CONSIDERATIONS REGARDING PNEUMATIC<br />

MUSCLE VOLUME<br />

by<br />

IOANA PETRE, TUDOR DEACONESCU, ANDREA DEACONESCU<br />

and DAN PETRE<br />

Abstract. A pneumatic artificial muscle is composed <strong>of</strong> an<br />

inner tube <strong>of</strong> variable length, made <strong>of</strong> a flexible material, typically<br />

neoprene. The tube is covered with a multilayer texture, made <strong>of</strong><br />

nylon with streng<strong>the</strong>ning and protecting role from <strong>the</strong> environment<br />

influences. Under <strong>the</strong> action <strong>of</strong> compressed air it increases its<br />

diameter and decreases its lengths. A pneumatic muscle is used<br />

successfully in different areas, especially in robotics. The paper<br />

presents some calculus models for volume <strong>of</strong> <strong>the</strong> pneumatic<br />

muscle, considered in relaxed and contracted state.<br />

Key words: pneumatic muscle, volume, relaxed state,<br />

contracted state.<br />

MODERN TECHNIQUES FOR EXPERIMENTATION<br />

OF ADJUSTABLE HYDROSTATIC PUMPS

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