Mechanical performance and fatigue life prediction of lattice structures: Parametric computational approach

Peng, Chenxi; Tran, Phuong; Nguyen‐Xuan, H.; Ferreira, António

doi:10.1016/j.compstruct.2019.111821

Cited by 86 publications

(36 citation statements)

References 58 publications

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“…The star regular curve was above the earlier mentioned bending‐dominated structures, and the cubic regular structures, purely stretching dominated, have the highest fatigue strength. Similar behavior in the normalized S–N curve was observed when comparing BCC, simple cubic (SC)‐BCC, and face‐centered cubic (FCC) structures with SC structure by Peng et al 55 The normalized S–N curve shown in Figure 9B indicates that the fatigue curve of star regular and cross regular overlaps with each other. While, the irregular and trabecular specimens except cross irregular have a certain overlap at the lower end of the graph.…”

Section: Resultssupporting

confidence: 73%

“…In this study, the fatigue strength of cubic regular structure reported is 100 MPa with a porosity of ~76% and as‐designed strut thickness of ~450 μm. Considering the difference in other parameters such as microstructure and heat treatment, the estimated fatigue strength of cubic regular is similar but slightly higher when compared to Zhao et al 36 The fatigue strength of 3.1 MPa obtained from cross‐shaped structures is very close to the fatigue strength of 2.5 MPa reported by Peng et al 55 from the fatigue life prediction of body‐centered cubic (BCC) (85% porosity) using finite element analysis. Irregularity had a predominant impact which reduced the fatigue strength by almost 10 times.…”

Section: Resultssupporting

confidence: 60%

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Quasi‐static compression and compression–compression fatigue behavior of regular and irregular cellular biomaterials

Raghavendra

Molinari

Cao

et al. 2021

Fatigue Fract Eng Mat Struct

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The main aim of the current study is to evaluate the compressive quasi‐static and fatigue properties of titanium alloy (Ti6Al4V) cellular materials, with different topologies, manufactured via laser powder bed fusion (LPBF) process. The topologies herein considered are lattice‐based regular and irregular configurations of cubic, star, and cross‐shaped unit cell along with trabecular‐based topology. The results have indicated that the effective stiffness of all configurations are in the range of 0.3–20 GPa, which is desirable for implant applications. The morphological irregularities in the structures induce bending‐dominated behavior affecting more the topologies with vertical struts. The S–N curves normalized with respect to the yield stress indicate that the behavior of star regular structures is between purely stretching‐dominated cubic and purely bending‐dominated cross‐based structures. Trabecular structures have shown desirable quasi‐static and fatigue properties despite the random distribution of struts.

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Section: Resultssupporting

confidence: 73%

Section: Resultssupporting

confidence: 60%

Quasi‐static compression and compression–compression fatigue behavior of regular and irregular cellular biomaterials

Raghavendra

Molinari

Cao

et al. 2021

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…The star regular curve was above the earlier mentioned bending dominated structures, and the cubic regular structures, purely stretching dominated, have the highest fatigue strength. Similar behavior in the normalized S-N curve was observed when comparing BCC, SC-BCC and FCC structures with simple cubic (SC) structure by Peng et al 55 . The normalized S-N curve shown in Fig.…”

Section: Fatigue Testsupporting

confidence: 79%

“…al. 55 from the fatigue life prediction of BCC (85% porosity) using finite element analysis. Irregularity had a predominant impact which reduced the fatigue strength by almost ten times.…”

Section: Fatigue Testmentioning

confidence: 99%

Quasi -- Static Compression and Compression -- Compression Fatigue Behavior of Regular and Irregular Cellular Biomaterials

Raghavendra

Molinari

Cao

et al. 2020

Preprint

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The main aim of the current study is to evaluate the compressive quasi-static and fatigue properties of titanium alloy (Ti6Al4V) cellular materials, with different topologies, manufactured via Laser Powder Bed Fusion (LPBF) process. The topologies herein considered are lattice based regular and irregular configurations of cubic, star and cross shaped unit cell along with trabecular based topology. The results have indicated that the effective stiffness of all configurations are in the range of 0.3 – 20 GPa, which is desirable for implant applications. The morphological irregularities in the structures induce bending dominated behavior affecting more the topologies with vertical struts. The S – N curves normalized with respect to the yield stress indicate that the behavior of star regular structures is between purely stretching dominated cubic and purely bending dominated cross based structures. Trabecular structures have shown desirable quasi-static and fatigue properties despite the random distribution of struts.

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“…As a mimic of nature cellular material, lattice material is designed with its unit cells arranged periodically along tessellation directions. Metallic lattice materials can provide excellent mechanical properties, e.g., ultra light weight, better durability, high specific strength and stiffness, and a superior energy absorption capability [1][2][3][4]. Methods for lattice material design can be generally classified into two categories, i.e., manual generation and mathematical generation [5].…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on the Uniaxial Behaviour of Topology-Optimised and Crystal-Inspired Lattice Materials

Yang

Xie

2020

Metals

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This work comparatively studies the uniaxial compressive performances of three types of lattice materials, namely face-centre cube (FCC), edge-centre cube (ECC), and vertex cube (VC), which are separately generated by topology optimisation and crystal inspiration. High similarities are observed between the materials designed by these two methods. The effects of design method, cell topology, and relative density on deformation mode, mechanical properties, and energy absorption are numerically investigated and also fitted by the power law. The results illustrate that both topology-optimised and crystal-inspired lattices are mainly dominated by bending deformation mode. In terms of collapse strength and elastic modulus, VC lattice is stronger than FCC and ECC lattices because its struts are arranged along the loading direction. In addition, the collapse strength and elastic modulus of the topology-optimised FCC and ECC are close to those generated by crystal inspiration at lower relative density, but the topology-optimised FCC and ECC are obviously superior at a higher relative density. Overall, all topology-generated lattices outperform the corresponding crystal-guided lattice materials with regard to the toughness and energy absorption per unit volume.

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Mechanical performance and fatigue life prediction of lattice structures: Parametric computational approach

Cited by 86 publications

References 58 publications

Quasi‐static compression and compression–compression fatigue behavior of regular and irregular cellular biomaterials

Quasi‐static compression and compression–compression fatigue behavior of regular and irregular cellular biomaterials

Quasi -- Static Compression and Compression -- Compression Fatigue Behavior of Regular and Irregular Cellular Biomaterials

Comparative Study on the Uniaxial Behaviour of Topology-Optimised and Crystal-Inspired Lattice Materials

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