Investigation of fatigue crack growth and crack turning on integral stiffened structures under mode I loading

Ll Llopart; B. Kurz; C. Wellhausen; M. Anglada; K. Drechsler; K. Wolf

doi:10.1016/j.engfracmech.2006.04.005

Investigation of fatigue crack growth and crack turning on integral stiffened structures under mode I loading

Ll Llopart, B. Kurz, C. Wellhausen, M. Anglada, K. Drechsler, K. Wolf

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

Integral structures have benefits compared to riveted structures, but they offer lower damage tolerance. This investigation analysed possible decrease of crack growth in integral structures by means of design analysis on stringer cross-sections. For this purpose the finite element analysis (FEA) was applied. First the reliability of FEA was proven by comparing calculated crack growth rates (CGR) to test results. Since CGR in linear elastic fracture mechanics is controlled by the stress intensity factors (SIF), different cross-sections were analysed. These configurations were evaluated regarding their crack turning behaviour (T-stress). The SIF was reduced about 18%. Crack turning is more probable when the crack is far away from stringer.

Original language	English
Pages (from-to)	2139-2152
Number of pages	14
Journal	Engineering Fracture Mechanics
Volume	73
Issue number	15
DOIs	https://doi.org/10.1016/j.engfracmech.2006.04.005
State	Published - Oct 2006
Externally published	Yes

Keywords

3D-FEM
Fatigue crack propagation
Integral structures
Stringer design
T-stress

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10.1016/j.engfracmech.2006.04.005

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title = "Investigation of fatigue crack growth and crack turning on integral stiffened structures under mode I loading",

abstract = "Integral structures have benefits compared to riveted structures, but they offer lower damage tolerance. This investigation analysed possible decrease of crack growth in integral structures by means of design analysis on stringer cross-sections. For this purpose the finite element analysis (FEA) was applied. First the reliability of FEA was proven by comparing calculated crack growth rates (CGR) to test results. Since CGR in linear elastic fracture mechanics is controlled by the stress intensity factors (SIF), different cross-sections were analysed. These configurations were evaluated regarding their crack turning behaviour (T-stress). The SIF was reduced about 18%. Crack turning is more probable when the crack is far away from stringer.",

keywords = "3D-FEM, Fatigue crack propagation, Integral structures, Stringer design, T-stress",

author = "Ll Llopart and B. Kurz and C. Wellhausen and M. Anglada and K. Drechsler and K. Wolf",

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T1 - Investigation of fatigue crack growth and crack turning on integral stiffened structures under mode I loading

AU - Llopart, Ll

AU - Kurz, B.

AU - Wellhausen, C.

AU - Anglada, M.

AU - Drechsler, K.

AU - Wolf, K.

PY - 2006/10

Y1 - 2006/10

N2 - Integral structures have benefits compared to riveted structures, but they offer lower damage tolerance. This investigation analysed possible decrease of crack growth in integral structures by means of design analysis on stringer cross-sections. For this purpose the finite element analysis (FEA) was applied. First the reliability of FEA was proven by comparing calculated crack growth rates (CGR) to test results. Since CGR in linear elastic fracture mechanics is controlled by the stress intensity factors (SIF), different cross-sections were analysed. These configurations were evaluated regarding their crack turning behaviour (T-stress). The SIF was reduced about 18%. Crack turning is more probable when the crack is far away from stringer.

AB - Integral structures have benefits compared to riveted structures, but they offer lower damage tolerance. This investigation analysed possible decrease of crack growth in integral structures by means of design analysis on stringer cross-sections. For this purpose the finite element analysis (FEA) was applied. First the reliability of FEA was proven by comparing calculated crack growth rates (CGR) to test results. Since CGR in linear elastic fracture mechanics is controlled by the stress intensity factors (SIF), different cross-sections were analysed. These configurations were evaluated regarding their crack turning behaviour (T-stress). The SIF was reduced about 18%. Crack turning is more probable when the crack is far away from stringer.

KW - 3D-FEM

KW - Fatigue crack propagation

KW - Integral structures

KW - Stringer design

KW - T-stress

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DO - 10.1016/j.engfracmech.2006.04.005

M3 - Article

AN - SCOPUS:33746814017

SN - 0013-7944

VL - 73

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JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

IS - 15

ER -

Investigation of fatigue crack growth and crack turning on integral stiffened structures under mode I loading

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