Additively-manufactured lightweight Metamaterials for energy absorption

Mohsenizadeh, Mehrdad; Gasbarri, Federico; Munther, Michael; Beheshti, Ali; Davami, Keivan

doi:10.1016/j.matdes.2017.11.037

Cited by 242 publications

(103 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the key issues referring to the investigations of regular cellular material is the definition of the relationship between structure topology and its mechanical response in terms of energy absorption [20][21][22][23]. This issue attracts the attention of many research groups and has become an object of extensive studies carried out with the use of experimental [24,25] and numerical approaches [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Investigations on the Mechanical Response of Gradient Lattice Structures Manufactured via SLM

Sienkiewicz

Płatek

Jiang

et al. 2020

Metals

View full text Add to dashboard Cite

The main aim of the paper is to evaluate the mechanical behavior or lattice specimens subjected to quasi-static and dynamic compression tests. Both regular and three different variants of SS 316L lattice structures with gradually changed topologies (discrete, increase and decrease) have been successfully designed and additively manufactured with the use of the selective laser melting technique. The fabricated structures were subjected to geometrical quality control, microstructure analysis, phase characterization and compression tests under quasi-static and dynamic loading conditions. The mismatch between dimensions in the designed and produced lattices was noticed. It generally results from the adopted technique of the manufacturing process. The microstructure and phase composition were in good agreement with typical ones after the additive manufacturing of stainless steel. Moreover, the relationship between the structure relative density and its energy absorption capacity has been defined. The value of the maximum deformation energy depends on the adopted gradient topology and reaches the highest value for a gradually decreased topology, which also indicates the highest relative density. However, the highest rate of densification was observed for a gradually increasing topology. In addition, the results show that the gradient topology of the lattice structure affects the global deformation under the loading. Both, static and dynamic loading resulted in both barrel- and waisted-shaped deformation for lattices with an increasing and a decreasing gradient, respectively. Lattice specimens with a gradually changed topology indicate specific mechanical properties, which make them attractive in terms of energy absorption applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigations on the Mechanical Response of Gradient Lattice Structures Manufactured via SLM

Sienkiewicz

Płatek

Jiang

et al. 2020

Metals

View full text Add to dashboard Cite

show abstract

“…Tough sample shows a moderate drop at 40 mm min −1 strain rate and a fairly low drop at 4 mm min −1 with a more flat deflection curve. The drop in the stiffness here also can be attributed to the buckling of the members, however, in more uniform and global fashion as observed during the loading (see also [50]). Moreover, fewer occurrence of local node failures are expected as evidenced by sample inspection after the test.…”

Section: Materials Propertiesmentioning

confidence: 54%

“…Various AM techniques have been reported previously for the fabrication of metamaterial structures [50]. In this work, the stretch-dominated structures with an octet-truss unit cell were designed in SolidWorks and 3D printed in an inverted stereolithography system (Form 2 Desktop SLA 3D Printer, Formlabs Inc., USA).…”

Section: Experimental Procedures 21 Materials Descriptionmentioning

confidence: 99%

“…These two resins, commercially named Tough and Gray, have mechanical properties similar to ABS and PMMA, respectively. For more details on the fabrication method, the reader is referred to our recent report [50].…”

Section: Experimental Procedures 21 Materials Descriptionmentioning

confidence: 99%

“…Metamaterials, a sub-class of cellular materials, with a periodic three-dimensional architecture, carefully engineered structure, and mechanical properties primarily dependent on their architecture rather than their constituent material, are in fact the most recent development in the ongoing quest for novel materials. They have shown their potential for blast protection [46,47] and impact energy absorption applications [48], while maintaining a relatively high stiffness and low density [49][50][51]. Additively-manufactured metamaterials with complex structures and micro scale components might revolutionize the conventional energy absorbing materials, not only due to their large densification strains and high strength to weight ratio, but also due to their shape recovery capabilities.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic energy absorption characteristics of additively-manufactured shape-recovering lattice structures

Davami

Mohsenizadeh

Munther

et al. 2019

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

With the advent of additive manufacturing, fabrication of complex structures with high efficiency for energy absorption and blast and impact mitigation has entered a new era. In this research the role of the architecture and material properties on the static and dynamic energy absorption properties of additively-manufactured complex cellular structures out of two different materials were studied under puncture and crush tests. A finite element simulation of the unit cell was also conducted to study the effect of loading rate on the final response of the material where the results showed good agreement with the experimental observations. It is shown that the studied additively manufactured structures were able to recover their shape significantly after a major deformation due to the impact. These results show the potential of additive manufacturing as a versatile tool for creating structures with complex geometries for energy absorption.

show abstract