Fatigue of thin periodic triangular lattice plates

Yifan Li; Anton Shterenlikht; Martyn Pavier; Harry Coules

doi:10.1051/matecconf/201930003002

Fatigue of thin periodic triangular lattice plates

Yifan Li
, Anton Shterenlikht
, Martyn Pavier
, Harry Coules

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

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Abstract

A method for predicting the fatigue life of triangular lattices is proposed in this paper by considering fatigue properties of single lattice struts. Fatigue tests of different sizes of lattice plates of aluminium alloy, and tests of single struts with different maximum fluctuating loads, have been conducted to validate this method. It is found that the struts in a triangular lattice break near to strut intersections, where stress and strain concentrations occur. Similar crack propagation paths were observed in different lattice plate specimens: the cracks grew at a 30° angle to the initial edge crack in the upper half of lattice plate. The mixed-mode fatigue crack propagation rate was also studied and expressed using an effective stress intensity factor. A size effect on the crack growth rate of triangular lattice plates was also observed: a fatigue crack will propagate slightly quicker in larger triangular plates than in smaller ones.

Original language	English
Title of host publication	Proceedings of the 12th International Conference on Multiaxial Fatigue and Fracture (ICMFF12)
Publisher	EDP Sciences
Number of pages	9
Volume	300
DOIs	https://doi.org/10.1051/matecconf/201930003002
Publication status	Published - 2 Dec 2019
Event	12th International Conference on Multiaxial Fatigue and Fracture - Bordeaux, France Duration: 24 Jun 2019 → 26 Jun 2019 https://www.icmff12.org/

Conference

Conference	12th International Conference on Multiaxial Fatigue and Fracture
Abbreviated title	ICMFF12
Country/Territory	France
City	Bordeaux
Period	24/06/19 → 26/06/19
Internet address	https://www.icmff12.org/

Keywords

Fatigue
Lattice

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10.1051/matecconf/201930003002

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Final published version, 975 KBLicence: CC BY

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@inproceedings{210b447caed043399df417439f5cd44d,

title = "Fatigue of thin periodic triangular lattice plates",

abstract = "A method for predicting the fatigue life of triangular lattices is proposed in this paper by considering fatigue properties of single lattice struts. Fatigue tests of different sizes of lattice plates of aluminium alloy, and tests of single struts with different maximum fluctuating loads, have been conducted to validate this method. It is found that the struts in a triangular lattice break near to strut intersections, where stress and strain concentrations occur. Similar crack propagation paths were observed in different lattice plate specimens: the cracks grew at a 30° angle to the initial edge crack in the upper half of lattice plate. The mixed-mode fatigue crack propagation rate was also studied and expressed using an effective stress intensity factor. A size effect on the crack growth rate of triangular lattice plates was also observed: a fatigue crack will propagate slightly quicker in larger triangular plates than in smaller ones. ",

keywords = "Fatigue, Lattice",

author = "Yifan Li and Anton Shterenlikht and Martyn Pavier and Harry Coules",

year = "2019",

month = dec,

day = "2",

doi = "10.1051/matecconf/201930003002",

language = "English",

volume = "300",

booktitle = "Proceedings of the 12th International Conference on Multiaxial Fatigue and Fracture (ICMFF12)",

publisher = "EDP Sciences",

address = "France",

note = "12th International Conference on Multiaxial Fatigue and Fracture<br/>, ICMFF12 ; Conference date: 24-06-2019 Through 26-06-2019",

url = "https://www.icmff12.org/",

}

Li, Y, Shterenlikht, A, Pavier, M & Coules, H 2019, Fatigue of thin periodic triangular lattice plates. in Proceedings of the 12th International Conference on Multiaxial Fatigue and Fracture (ICMFF12). vol. 300, 03002, EDP Sciences, 12th International Conference on Multiaxial Fatigue and Fracture
, Bordeaux, France, 24/06/19. https://doi.org/10.1051/matecconf/201930003002

TY - GEN

T1 - Fatigue of thin periodic triangular lattice plates

AU - Li, Yifan

AU - Shterenlikht, Anton

AU - Pavier, Martyn

AU - Coules, Harry

PY - 2019/12/2

Y1 - 2019/12/2

N2 - A method for predicting the fatigue life of triangular lattices is proposed in this paper by considering fatigue properties of single lattice struts. Fatigue tests of different sizes of lattice plates of aluminium alloy, and tests of single struts with different maximum fluctuating loads, have been conducted to validate this method. It is found that the struts in a triangular lattice break near to strut intersections, where stress and strain concentrations occur. Similar crack propagation paths were observed in different lattice plate specimens: the cracks grew at a 30° angle to the initial edge crack in the upper half of lattice plate. The mixed-mode fatigue crack propagation rate was also studied and expressed using an effective stress intensity factor. A size effect on the crack growth rate of triangular lattice plates was also observed: a fatigue crack will propagate slightly quicker in larger triangular plates than in smaller ones.

AB - A method for predicting the fatigue life of triangular lattices is proposed in this paper by considering fatigue properties of single lattice struts. Fatigue tests of different sizes of lattice plates of aluminium alloy, and tests of single struts with different maximum fluctuating loads, have been conducted to validate this method. It is found that the struts in a triangular lattice break near to strut intersections, where stress and strain concentrations occur. Similar crack propagation paths were observed in different lattice plate specimens: the cracks grew at a 30° angle to the initial edge crack in the upper half of lattice plate. The mixed-mode fatigue crack propagation rate was also studied and expressed using an effective stress intensity factor. A size effect on the crack growth rate of triangular lattice plates was also observed: a fatigue crack will propagate slightly quicker in larger triangular plates than in smaller ones.

KW - Fatigue

KW - Lattice

U2 - 10.1051/matecconf/201930003002

DO - 10.1051/matecconf/201930003002

M3 - Conference Contribution (Conference Proceeding)

VL - 300

BT - Proceedings of the 12th International Conference on Multiaxial Fatigue and Fracture (ICMFF12)

PB - EDP Sciences

T2 - 12th International Conference on Multiaxial Fatigue and Fracture<br/>

Y2 - 24 June 2019 through 26 June 2019

ER -

Fatigue of thin periodic triangular lattice plates

Abstract

Conference

Keywords

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