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Finite Element Analysis Of Adolescent Mandible Fracture Occurring During Accidents

Żmudzki J., Chladek G., Panek K., Lipiński P.

Archives of Metallurgy and Materials

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2020

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Vol. 65, iss. 1

65--72

EN

The paper aims was assessing risks of mandible fractures consequent to impacts or sport accidents. The role of the structural stiffness of mandible, related to disocclusion state, was evaluated using the finite element method. It has been assumed, that the quasi-static stress field, due to distributed forces developed during accidents, could explain the common types of mandibular fractures. Mandibular condyles were supposed jammed in the maxillary fossae. The force of 700 N, simulating an impact on mandible, has been sequentially applied in three distinct areas: centrally, at canine zone and at the mandibular angle. Clinically most frequent fractures of mandible were recognized through the analysis of maximal principal stress/strain fields. It has been shown that mandibular fracture during accidents can be analyzed at satisfactory level using linear quasi-static models for designing protections.

2

Basic 3D graphics processor implemented on small FPGA

Panek K., Flak B., Koryciak S., Wiatr K.

Measurement Automation Monitoring

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2018

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Vol. 64, No. 1

8--10

EN

FPGAs have big computing possibilities and therefore are very popular as dedicated hardware accelerators. A few years ago, FPGAs were expensive and the cheapest ones had very limited capabilities, because of small amount of logic elements and slow internal clocks. Nowadays, cheap development boards are available at a price below 50€ with abilities to transmit even HDMI signals. This paper covers implementation of the soft processor with a 3D graphics coprocessor on the cheapest available FPGA board with HDMI connector, containing only 8k Logic Elements.

3

Global identification of the laminates’ material parameters

Beluch W., Panek K.

Zeszyty Naukowe Wyższej Szkoły Informatyki

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2016

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Vol. 15, Nr 1

63--74

EN

The paper is devoted to the global identification of material parameters of the single layer of the laminate. The measurement data for identification are derived from the laminate strength tests in the form of the three-point flexure test and the tensile test with a video extensometer. The evolutionary algorithm is applied to perform the identification procedure. Finite element method commercial software is employed to solve a boundary-value problem for laminates. Examples presenting effectiveness of the proposed method are included.

PL

Artykuł jest poświęcony globalnej identyfikacji parametrów materiałowych pojedynczej warstwy laminatu. Dane pomiarowe dla identyfikacji pochodzą z prób wytrzymałościowych w postaci próby trójpunktowego zginania oraz próby rozciągania z zastosowaniem wideoekstensometru. Algorytm ewolucyjny został zastosowany jako metoda optymalizacji. Komercyjne oprogramowanie metody elementów skończonych zostało użyte w celu rozwiązania zadania brzegowego dla laminatów. Zamieszczono przykłady prezentujące skuteczność proponowanego podejścia.