Paper Titles
Gearbox Failure Detection Using Growing Hierarchical Self-Organizing Map
p.177
Interfacial Fracture Toughness of APS Thermal Barrier Coating under High Temperature
p.181
Fatigue Analysis of Forged Aerospace Components Based on Micro Structural Parameters
p.185
Research on Fracture Damage Coupled with Crack Arrest by Anchorage Model of Discontinuous Jointed Rock Mass under the State of Complex Stress
p.189
Patternanalysis of the Severity of Multiple Crack Arrays
p.193
Boundary-Singular Integral Equation Method to Calculate the Bending Center and Stress Intensity Factors of Cracked Cylinder under Saint-Venant Bending
p.197
A New Model for Fatigue Life Distribution of Concrete
p.201
Models for Estimating the Durability of Repeated Impacts
p.205
Assessment of the Fatigue Behaviour of Friction Stir Welded Joints: Aluminium Alloy 6082-T6
p.209

Patternanalysis of the Severity of Multiple Crack Arrays

Article Preview

Abstract:

Multiple Site Damage (MSD) is a typical problem of aging aircraft structures. On the other hand a similar situation may occur, if damages in the vicinity of the crack tip of a large crack is investigated. In some preceding papers the author has shown the possibility to assess the criticality of a MSD-scenario by comparing certain data compression measures of the crack scenario in an early stage. All of these scenarios were linked to cracks in one row of fasteners of equal distance, and the method was used in conjunction with the Monte-Carlo Simulation. The idea of using such ways to assess multiple crack scenarios is extended now in the paper presented here. The investigations are extended now in the sense that, the scenarios are more complex as they include large cracks and small cracks in the vicinity of the crack, where no fixed distance of the cracks is foreseen. The attempt is made to relate such results to experimental data on residual strength and therefore, to relate them to sophisticated models like the Gurson model.

You might also be interested in these eBooks
Advances in Fracture and Damage Mechanics VI View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 348-349)

Pages:

193-196

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.348-349.193

Citation:

Cite this paper

Online since:

September 2007

Authors:

Peter Horst

Keywords:

Gurson Model, Pattern Analysis, Residual Strength

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] J.C. Newman: Advances in fatigue and fracture mechanics analyses for aircraft structures, Plantema Memorial Lecture, ICAF 1999, (1999).

Google Scholar

[2] A.L. Gurson: Continuum theory of ductile rupture by void nucleation and growth: Part1-Yield criteria and flow rules for porous ductile media, J. Engg. Materials Technology, vol. 99, (1977), pp.2-15.

DOI: 10.1115/1.3443401

Google Scholar

[3] T. Siegmund and W. Brocks: Prediction of the work of separation and implications to modeling, Int. J. of Fracture, vol. 99, (1999), pp.97-116.

Google Scholar

[4] T. Pardoen and J.W. Hutchinson: Micromechanics-based model for trends in toughness of ductile metals, Acta Materialia, vol 51 (2003), pp.133-148.

DOI: 10.1016/s1359-6454(02)00386-5

Google Scholar

[5] K-F. Nilsson and J.W. Hutchinson: Interaction between a major crack and small crack damage in aircraft sheet material, Int. J. Solids Structures, vol. 31, (1994), pp.2331-2346.

DOI: 10.1016/0020-7683(94)90155-4

Google Scholar

[6] P. Horst: Criteria for the Assessment of Multiple Site Damage in Ageing Aircraft Structural Integrity & Durability, Vol. 1 (2005), pp.49-65.

Google Scholar

[7] D.A. Hills, P.A. Kelly, D.N. Dai and A.M. Korsunsky: Solution of crack problems - The distributed dislocation technique, Kluwer (1996).

Google Scholar

[8] P. Horst: A simple numerical model for the calculation of multiple cracks in thin structures, German Aerospace Congress(DGLR-Jahrestagung) (1995), pp.905-913.

Google Scholar

[9] R. de Wit, R.J. Fields, S. R. Low, D.E. Harne and T. Foecke: Fracture testing of large-scale thin-sheet aluminium alloy. NIST report NISTIR 5661 (1995).

DOI: 10.6028/nist.ir.5661

Google Scholar