Fatigue of thin periodic triangular lattice plates

Yifan Li, Anton Shterenlikht, Martyn Pavier, Harry Coules

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish
Title of host publicationProceedings of the 12th International Conference on Multiaxial Fatigue and Fracture (ICMFF12)
PublisherEDP Sciences
Number of pages9
Volume300
DOIs
Publication statusPublished - 2 Dec 2019
Event12th International Conference on Multiaxial Fatigue and Fracture
- Bordeaux, France
Duration: 24 Jun 201926 Jun 2019
https://www.icmff12.org/

Conference

Conference12th International Conference on Multiaxial Fatigue and Fracture
Abbreviated titleICMFF12
CountryFrance
CityBordeaux
Period24/06/1926/06/19
Internet address

Keywords

  • Fatigue
  • Lattice

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    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. https://doi.org/10.1051/matecconf/201930003002