Digital Twin For Fatigue Analysis

• Autorzy: Chabod Amaury , Baron Nicholas

Identyfikatory

DOI

10.2478/fas-2020-0005

• Języki publikacji: EN

Abstrakty

EN

The main design parameters that impact the fatigue of components are geometry, material and loading. Simulation with Finite Element Analysis (FEA) and tests on a vibrating table are often used to understand the dynamic behaviour of components and thus validate those items. Accelerated tests are used for the mission profile and test definition, as described in GAM-EG-13, MIL-STD-810F and RTCA DO-160E. The shock response spectrum (SRS) and the extreme response spectrum (ERS) allow for a comparison of the power spectrum density (PSD) and the acceleration factor applied in terms of fatigue severity through the fatigue damage spectrum (FDS). In addition, the hypothesis of linear damage accumulation enables the combination of several events for specifying a mission profile. Ultimately, the mission profile, which represents a usage that might span over several years, can be reduced to a shorter duration with a damage extraction technique. This is particularly useful for the definition of vibrating table specifications. An advantage of the virtual vibrating table is the reduction of the number of prototypes and the understanding of failure modes. To achieve this objective, finite element analysis in the frequency domain (harmonic analysis) is used and the structural stress response is evaluated with a PSD loading. A statistical model of rainflow allows assessing the damage on the components. The presentation also shows the effects of the damping factor on damage results. To achieve accurate results and define a Digital Twin, the correlation between test results and the finite element analysis is fundamental. Experimental modal analysis, based on the measured acceleration responses, helps to validate calculated modal frequencies and to assess the damping for each mode. This study shows the importance and the sensitivity on damping of the structural response, and in turn on fatigue.

Słowa kluczowe

EN

fatigue analysis; digital twin method; modal analysis; test-FEA correlation

• Wydawca: Wydawnictwa Naukowe Sieci Badawczej Łukasiewicz - Instytutu Lotnictwa
• Czasopismo: Fatigue of Aircraft Structures
• Rocznik: 2020
• Tom: Iss. 12
• Strony: 47--56
• Opis fizyczny: Bibliogr. 6 poz., rys., tab., wykr., wzory

Twórcy

autor

Chabod Amaury

• HBK France PRENSCIA, 3 chemin de la Dîme, 95700 Roissy-en-France

autor

Baron Nicholas

• HBK France PRENSCIA, 3 chemin de la Dîme, 95700 Roissy-en-France

Bibliografia

• [1] Conference « HBM on Tour », « Réduire la durée de vos essais ? « Réel et Virtuel: Une journée pour vous convaincre », Loic Guérin (HBK), Henri Gérenton (HBK), Amaury CHABOD (HBK).
• [2] Gieck, K. and Bendit, G. (1997). Formulaire Technique, 10e édition revue et complétée. Dunod, France.
• [3] White paper nCode, “Accelerated Vibration Testing based on Fatigue Damage Spectra”, Dr Andrew Halfpenny.
• [4] Conference nCode, “The Role of Vibration in Fatigue”, 5th October 2017, Hotel Novotel Part Dieu, Lyon.
• [5] Meirovitch, L. (2001). Fundamentals of Vibrations, McGraw-Hill International Edition, Mechanical Engineering Series, p. 400.
• [6] DesignLife Theory Guide, paragraphs 3.6 and 5.3.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).