Investigation on fatigue property of three-dimensional reticulated porous metal foams

Abstract

As widely used new engineering materials, porous metal foams are often subject to fatigue. In the present paper, the fatigue property of three-dimensional (3D) reticulated porous metal foams has been studied in a new way. The analytical model of fatigue has been put forward based on the simplified structure of these reticulated porous materials under cyclic loads, and a direct relationship between the index weighing the fatigue property and the porosity has been presented for porous materials. The relationship indicates that the fatigue property of porous bodies under controlled nominal stress amplitudes gets worse with increasing porosity, and under controlled nominal strain amplitudes gets better with increasing porosity and decreasing pore diameter. The cyclic compression–compression test for fatigue under controlled nominal stress amplitudes and the cyclic bending test for fatigue under controlled nominal strain amplitudes were performed on the nickel foam produced by electrodeposition, a typical 3D reticulated material, and the abovementioned relationship was experimentally proved to be practical with the response of the electrical resistivity to fatigue damage. The corresponding data of aluminium foam also show similar results in the stress fatigue property.

Improving the fatigue performance of porous metallic biomaterials produced by Selective Laser Melting

“…larger strut diameter). The positive effect of increased relative density on fatigue life shown in Figure 6A corresponds with findings reported in other works on lattice structures [5,13,14] and metallic foams [18,19].…”

“…Similar findings were reported by F. Li et al for porous titanium samples produced by diffusion bonding [17]. Most of these recent scientific works on fatigue of porous metals are based on previous works related to mechanical behavior of metal foams [18][19][20][21].…”

Special review: Mechanical investigation on failure modes of reticular porous metal foams under different loadings in engineering applications

“…Porous materials can be widely applied in a number of engineering fields, involving separation, filtration, heat exchange, biological transplanting, electrochemical process and lightweight structures (Liu and Ma, 2020; Yusuf and Jha, 2018; Liu and Chen, 2014; Atwater et al , 2018), with the reticular metal foam (Plate 1) as a quite representative example (Liu and Ma, 2020; Atwater et al , 2018; August et al , 2016; Chen et al , 2018). In order to use these materials more effectively and reasonably, the research on their mechanical properties has aroused extensive interests (Gibson and Ashby, 1999; Xiao et al , 2015; Jung and Diebels, 2017; Huang et al , 2008, 2012; Benedik et al , 2010; Aly, 2010a, b; Soni and Biswas, 2018; Zhou et al , 2014; Tang et al , 2014; Palka et al , 2016; Wu et al , 2019; Schueler et al , 2013; Pang et al , 2011; Cho et al , 2019; Kaya and Fleck, 2014; Yang et al , 2019; Shi et al , 2017), and the present authors have also done some relevant works (Liu and Ma, 2020; Liu, 2000, 2004a, b, c, 2006, 2007, 2010a, b, c, 2011; Liu et al , 2003, 1999a, 2001a, b, 2009, 2011; Liu and Chen, 2009; Liu and Du, 2011, 2012). The published researches on the failure mode are mainly focused on metal foams under uniaxial tension and compression, while quite rare on that under other loading forms.…”