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Contact Stress Simulation for Mg-0.5Ca-xMn Alloys used for Medical Application

Nastasa Roxana Oana, Tufescu Ana, Munteanu Corneliu, Istrate Bogdan, Przybył Anna, Ianus Gelu

Archives of Metallurgy and Materials

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2022

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Vol. 67, iss. 2

405--408

EN

In the past decades, Mg alloys have been studied intensively as potential orthopedic applications. The present research work, the FEA of the obtained contact stresses in the case of the load applied on Mg-0.5Ca-xMn alloys has been investigated. It has been used the NCB Curved Femur Shaft Plate type as a model in order to establish the necessary modeling parameters. The objective of the present work was to highlight the strain values at the contact point on the surface of the Mg-0.5Ca-xMn alloys. The results showed that the highest stresses observed near the gaps of the plate and in the screws. It means that all mechanical loads are sustained by the plate and screws, and the patient’s femur can be recovered.

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Theoretical and experimental analysis of loading impact from the progressive gear on the lift braking distance with the use of the free fall method

Lonkwic P., Różyło P.

Advances in Science and Technology. Research Journal

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2016

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Vol. 10, nr 30

103--109

EN

The gear which is the central safety element of the friction drive lift during braking is exposed to overloading connected with changeable weight which loads the lift braking system. In the article the results of numerical analysis for braking process of CHP 2000 type progressive gear distinguished by an innovative design have been presented. The numerical analysis was conducted with the use of a simulation of the gear roller displacement depending on changeable loading with the support of Abaqus/CAE software. Displacement of the gear roller from the neutral position in which the gear starts loosing energy of speeding up weight to zero was simulated. The results obtained from computer simulations were verified on the basis of a physical experiment at the bench station created to verify braking parameters of the gears with the use of free fall method.

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Analiza sprężystych pól wytężenia w ramie samochodu ciężarowego ukształtowanej metodą SADSF

Markiewicz I.

Eksploatacja i Niezawodność

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2007

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nr 2

22-27

PL

Praca przedstawia wyniki analiz MES sprężystych pól wytężenia w ramie samochodu ciężarowego, której wstępny kształt i wymiary otrzymano metodą statycznie dopuszczalnych nieciągłych pól naprężeń. Analizy te były prowadzone, ponieważ metoda ta jest w chwili obecnej właściwie jedynym narzędziem, które pozwala - jak żadne inne - rozwiązywać nawet zadania przestrzennego rozmieszczenia materiału, gdy dane są tylko warunki brzegowe.

EN

The method of statically admissible discontinuous stress fields (SADSF) has become the tool for strength shaping of similar significance as the finite element method (FEM) for analysis and dimensioning. The paper presents the results of analyses of elastic effort fields in complex truck frame structure designed by the SADSF method. The FEM method is used for the analysis. Results of numerical investigation are presented and discussed.