Počet záznamů: 1  

Over-deterministic method: The influence of rounding numbers on the accuracy of the values of williams’ expansion terms

  1. 1. 0479812 - UFM-A 2018 RIV IT eng J - Článek v odborném periodiku
    Růžička, V. - Malíková, Lucie - Seitl, Stanislav
    Over-deterministic method: The influence of rounding numbers on the accuracy of the values of williams’ expansion terms.
    Frattura ed Integrita Strutturale. Roč. 11, č. 42 (2017), s. 128-135 ISSN 1971-8993
    Grant CEP: GA ČR GA17-01589S
    Institucionální podpora: RVO:68081723
    Klíčová slova: Over-deterministic * Fracture mechanics * Rounding numbers * Stress field * Williams’ expansion
    Kód oboru RIV: JL - Únava materiálu a lomová mechanika
    Obor OECD: Audio engineering, reliability analysis

    A study on the accuracy of the values of Williams’ expansion terms influenced by rounding numbers is presented. The results are presented taking into account a three-point bend single edge notched beam. Crack tip stress tensor components are expressed using the linear elastic fracture mechanics (LEFM) theory in this work, more precisely via its multi-parameter formulation, i.e. by Williams’ power series (WPS). Determination of the coefficients of the terms of this series is performed using the least squares-based regression technique known as the over-deterministic method (ODM), for which displacements data obtained numerically in software ANSYS are taken as inputs. The values of Williams’ expansion terms based on the displacement data obtained are calculated by using various levels of rounding numbers and the results are compared and discussed.
    Trvalý link: http://hdl.handle.net/11104/0275740