The effort of the dynamic simulation on the fatigue damage evaluation of flexible mechanical systems loaded by non-Gaussian and non stationary loads

被引：28

作者：

Cianetti, F. ^{[1
]}

Palmieri, M. ^{[1
]}

Slavic, J. ^{[2
]}

Braccesi, C. ^{[1
]}

Morettini, G. ^{[1
]}

机构：

[1] Univ Perugia, Dept Engn, Via G Duranti 93, I-06125 Perugia, Italy

[2] Univ Ljubljana, Fac Mech Engn, Askerceva 6, Ljubljana 1000, Slovenia

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2017年 / 103卷

关键词：

Vibration fatigue; Flexible components; Dynamic simulation; Non-stationary signals; Non-Gaussian signals; LIFE ESTIMATION; MODELS;

D O I：

10.1016/j.ijfatigue.2017.05.020

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Even if in fatigue application it is common to assume stationary and Gaussian excitation, the impact of non-Gaussian and non-stationary loadings on the service life of a mechanical component is known. Non-Gaussian and non-stationary excitations are generally observed in several industrial applications (i.e. automotive, aeronautical, etc.) and for this, the assessment of the effect of such loads results necessary. From this assumption, the activity herein presented starts from experimental results, previously obtained, that analysed the influence of non-Gaussianity (generally evaluated by kurtosis) and of non-stationarity of inputs on the fatigue life of an Y-shaped specimen. In the present paper the finite element model of the sample and its full validation obtained by numerical/experimental comparison is presented. Moreover, due to the relevant effect of the system's dynamics on the stress strain response previously observed, a wider assessment of non-Gaussianity and non-stationarity influence on the fatigue life has been numerically analysed together with the influence of the multi modal behaviour of the component by adopting an excitation frequency range that excites two modes of the model. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：60 / 72

页数：13

共 33 条

[1] On the inverse power laws for accelerated random fatigue testing [J].

Allegri, G. ;

Zhang, X. .

INTERNATIONAL JOURNAL OF FATIGUE, 2008, 30 (06) :967-977

[2]

[Anonymous], P 27 IAHR S HYDR MAC

[3]

[Anonymous], 2000, MILSTD810F

[4]

Basquin O.H., 1910, Proc Am Soc Test Mater, V10, P625

[5]

Benasciutti D, 2009, INT J FATIGUE, V31, P766

[6]

Benasciutti D., 2004, THESIS

[7]

Bendat J.S., 2010, Random Data: Analysis and Measurement Procedures, V4th edn

[8] Random fatigue. A new frequency domain criterion for the damage evaluation of mechanical components [J].

Braccesi, C. ;

Cianetti, F. ;

Tomassini, L. .

INTERNATIONAL JOURNAL OF FATIGUE, 2015, 70 :417-427

[9] Development of selection methodologies and procedures of the modal set for the generation of flexible body models for multi-body simulation [J].

Braccesi, C ;

Cianetti, F .

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART K-JOURNAL OF MULTI-BODY DYNAMICS, 2004, 218 (01) :19-30

[10] Evaluation of mechanical component fatigue behavior under random loads: Indirect frequency domain method [J].

Braccesi, C. ;

Cianetti, F. ;

Lori, G. ;

Pioli, D. .

INTERNATIONAL JOURNAL OF FATIGUE, 2014, 61 :141-150

← 1 2 3 4 →