TY - JOUR
T1 - Development of novel hybrid TPMS cellular lattices and their mechanical characterisation
AU - Novak, Nejc
AU - Al-Ketan, Oraib
AU - Borovinšek, Matej
AU - Krstulović-Opara, Lovre
AU - Rowshan, Reza
AU - Vesenjak, Matej
AU - Ren, Zoran
N1 - Publisher Copyright:
© 2021 The Author(s)
PY - 2021/11/1
Y1 - 2021/11/1
N2 - Uniform lattices composed of one type of lattice structure repeated periodically have been extensively investigated in literature for their mechanical and physical properties. Their promising properties, which include a desirable combination of high strength, stiffness and toughness, suggest that hybrid structures made of two or more lattice types can exhibit even more advantageous and desired properties. In this work, the mechanical properties of hybrid cellular structures designed using implicit functions are investigated both experimentally and numerically. Two proposed samples are investigated comprised of a Gyroid and a Diamond unit cells hybridised linearly and radially. First, a finite element computational model was utilised in LS-DYNA to capture the mechanical properties of the additively manufactured constituent lattices (i.e., Gyroid and Diamond) made of stainless steel 316L and tested under dynamic and quasi-static loading conditions. The model was validated for three different relative densities. Then, the validated computational model was then tested to predict the mechanical behaviour of the proposed hybrid lattices. Finally, the proposed hybrid lattices were fabricated and mechanically tested to obtain their mechanical properties. A good agreement between experimental and computational results was achieved. The validated computational models will be used to evaluate other designs of TPMS lattices and their crashworthiness performance for protective equipment applications.
AB - Uniform lattices composed of one type of lattice structure repeated periodically have been extensively investigated in literature for their mechanical and physical properties. Their promising properties, which include a desirable combination of high strength, stiffness and toughness, suggest that hybrid structures made of two or more lattice types can exhibit even more advantageous and desired properties. In this work, the mechanical properties of hybrid cellular structures designed using implicit functions are investigated both experimentally and numerically. Two proposed samples are investigated comprised of a Gyroid and a Diamond unit cells hybridised linearly and radially. First, a finite element computational model was utilised in LS-DYNA to capture the mechanical properties of the additively manufactured constituent lattices (i.e., Gyroid and Diamond) made of stainless steel 316L and tested under dynamic and quasi-static loading conditions. The model was validated for three different relative densities. Then, the validated computational model was then tested to predict the mechanical behaviour of the proposed hybrid lattices. Finally, the proposed hybrid lattices were fabricated and mechanically tested to obtain their mechanical properties. A good agreement between experimental and computational results was achieved. The validated computational models will be used to evaluate other designs of TPMS lattices and their crashworthiness performance for protective equipment applications.
KW - Cellular materials
KW - Computational modelling
KW - Experimental testing
KW - Hybrid lattices
KW - Multi-morphology
KW - Triply periodical minimal surface
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U2 - 10.1016/j.jmrt.2021.08.092
DO - 10.1016/j.jmrt.2021.08.092
M3 - Article
AN - SCOPUS:85114440743
SN - 2238-7854
VL - 15
SP - 1318
EP - 1329
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
ER -