Multiaxial mechanical characterization of additively manufactured open-cell Kelvin foams

被引:32
作者
Wang, Erdong [1 ,2 ,3 ]
Chen, Chao [4 ]
Zhang, Guangzhou [1 ]
Luo, Quantian [2 ]
Li, Qing [5 ]
Sun, Guangyong [2 ]
机构
[1] Hefei Univ, Sch Adv Mfg Engn, Hefei 230601, Peoples R China
[2] Hunan Univ, State Key Lab Adv Design & Manufacture Vehicle Bod, Changsha 410082, Peoples R China
[3] Anhui Prov Engn Technol Res Ctr Intelligent Vehicl, Hefei 230601, Peoples R China
[4] Zhuzhou CRRC Times Semicond Co Ltd, Zhuzhou 412001, Peoples R China
[5] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia
基金
中国国家自然科学基金;
关键词
Additive manufacturing; Open-cell Kelvin foam; Yield surface; Manufactured defects; Hybrid foams; YIELD BEHAVIOR; COMPRESSIVE BEHAVIOR; ALUMINUM FOAM; SURFACE; LATTICE; MODEL; LOADINGS;
D O I
10.1016/j.compstruct.2022.116505
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Additively manufactured lattice structures (AMLS) exhibit substantially more freedom in design compared with traditional cellular materials such as honeycombs and stochastic foams. Prior to extensive applications, multiaxial mechanical behaviors of AMLS need to be thoroughly understood. In this study, open-cell Kelvin lattice structures (named as Kelvin foams) are fabricated through the selective laser melting (SLM) process using 316L stainless steel powder. Multi-cell numerical models are developed and validated against the uniaxial compressive results and then adopted to simulate virtual triaxial experiments. An energy dissipation point is adopted to define onset of yielding. Multiaxial yield surface of Kelvin foams is characterized in the von Mises and mean stress plane, which can be well fitted in terms of an elliptical or a parabolic yield function. The normalized yield surface using uniaxial yield strength is still relied on the strut diameter. It is found that the yield surface is gradually shrunk with increasing strut-diameter dimensional tolerance induced by the SLM process, which becomes more pronounced when its stress state is close to a hydrostatic compression. The yield surface is found to expand when the expanded polystyrene (EPS) foam is used as a filler material, but the influence of foam filler becomes weaker when gradually experiencing hydrostatic compression.
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页数:12
相关论文
共 72 条
[1]   Effective conductivities and elastic moduli of novel foams with triply periodic minimal surfaces [J].
Abueidda, Diab W. ;
Abu Al-Rub, Rashid K. ;
Dalaq, Ahmed S. ;
Lee, Dong-Wook ;
Khan, Kamran A. ;
Jasiuk, Iwona .
MECHANICS OF MATERIALS, 2016, 95 :102-115
[2]  
[Anonymous], 2009, Standard test methods for tension testing of metallic materials
[3]   Multiaxial yield surface of transversely isotropic foams: Part I Modeling [J].
Ayyagari, Ravi Sastri ;
Vural, Murat .
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 2015, 74 :49-67
[4]   Deformation mechanisms and post-yielding behavior of additively manufactured lattice structures [J].
Babamiri, Behzad Bahrami ;
Askari, Hesam ;
Hazeli, Kavan .
MATERIALS & DESIGN, 2020, 188
[5]   Architected cellular materials: A review on their mechanical properties towards fatigue-tolerant design and fabrication [J].
Benedetti, M. ;
du Plessis, A. ;
Ritchie, R. O. ;
Dallago, M. ;
Razavi, N. ;
Berto, F. .
MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2021, 144
[6]   Development of a multifunctional panel for aerospace use through SLM additive manufacturing [J].
Bici, Michele ;
Brischetto, Salvatore ;
Campana, Francesca ;
Ferro, Carlo Giovanni ;
Secli, Carlo ;
Varetti, Sara ;
Maggiore, Paolo ;
Mazza, Andrea .
11TH CIRP CONFERENCE ON INTELLIGENT COMPUTATION IN MANUFACTURING ENGINEERING, 2018, 67 :215-220
[7]   Dynamic compressive behavior of a modified additively manufactured rhombic dodecahedron 316L stainless steel lattice structure [J].
Cao, Xiaofei ;
Xiao, Dengbao ;
Li, Ying ;
Wen, Weibin ;
Zhao, Tian ;
Chen, Zihao ;
Jiang, Yongbo ;
Fang, Daining .
THIN-WALLED STRUCTURES, 2020, 148
[8]   Mechanical properties of an improved 3D-printed rhombic dodecahedron stainless steel lattice structure of variable cross section [J].
Cao, Xiaofei ;
Duan, Shengyu ;
Liang, Jun ;
Wen, Weibin ;
Fang, Daining .
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 2018, 145 :53-63
[9]   Mechanical behavior and energy dissipation of infilled, composite Ti-6Al-4V trusses [J].
Chapkin, Wesley A. ;
Simone, Davide L. ;
Frank, Geoffrey J. ;
Baur, Jeffery W. .
MATERIALS & DESIGN, 2021, 203
[10]   A phenomenological framework of constitutive modelling for incompressible and compressible elasto-plastic solids [J].
Chen, C ;
Lu, TJ .
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 2000, 37 (52) :7769-7786