Papers by Author: Mihaela Suciu

Abstract: Aeronautic industries, medicine, automotive industries are domains in which the composite materials are very important. In orthopedics and orthodontist domains, titanium and its alloys are very used, because their mechanical properties are similar to bone tissue. Bio-composite sandwich beams have high stiffness in flexion and good thermal characteristics. The analytical calculus for bending bio-composite beams is very important. We calculate the arrows for sandwich beams for two aspects: first – beam in four kinds of alloys (titanium alloys, stainless steel, aluminum alloys, Co-Cr-Mo alloys) and second – bio-composite sandwich beam, composed of two equal layers in same alloys and heart in: polyurethane foam, polystyrene foam, epoxide, phenolic, polyester, polyamides, balsa 1 and balsa 2 and compare its.

Abstract: This paper presents the determination of longitudinal elasticity module or Young's modulus - E and Poisson's ratio - ν, for a desmopam membrane by Digital Image Correlation Method. These elements, together with the geometric characteristics, are input into the study of membrane by Finite Elements Method (FEM). Values deduced from measurements by Digital Image Correlation Method are convergent with those specified by the manufacturer, [.

Abstract: Abstract. The bio-composites materials are very important for a lot of industry and life domains, particularly in the aeronautic industries and medicine, in orthopedics. Titanium and its alloys are most widely used, due to their mechanical properties similar to bone tissue. The sandwich structures are very light, they have a high stiffness in flexion and very good thermal characteristics. For the compressed sandwich structures, risks of buckling are higher than the conventional compressed structures, limited by a critical value of the applied force, then the deformations grow in importance and uncontrolled manner. We try to calculate the critical buckling force by the method presented in [2].

Abstract: The paper presents an analytical calculus for the bending beams on elastic environment. The elastic environment sends in all points a reaction force proportional to the deformation with the same constant of proportionality in all points. The calculus of the state vectors associated at the origin section and at the end section of the beam is made by Transfer-Matrix Method, putting the conditions on the supports (extremities) of the beam. After, we can calculate all state vectors for all sections of the beam.

Abstract: This paper presents a study of the axially symmetric plates, charged with uniform load by Transfer-Matrix Method. The analytical calculus is based of the theory of Dirac’s and Heaviside’s functions and operators. That is an important possibility to result the circular plates, with the opportunity to program the calculus to obtain the eight elements of the exterior circumference state vector and for the interior circumference state vector of a tapping plate. After, we can calculate for all the values r0

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