scholarly journals Mechanical behaviour of additively-manufactured polymeric octet-truss lattice structures under quasi-static and dynamic compressive loading

2019 ◽  
Vol 162 ◽  
pp. 106-118 ◽  
Author(s):  
Chen Ling ◽  
Alessandro Cernicchi ◽  
Michael D. Gilchrist ◽  
Philip Cardiff
Keyword(s):  
Mechanical Behaviour ◽  
Compressive Loading ◽  
Lattice Structures ◽  
Octet Truss ◽  
Dynamic Compressive Loading

Finite element analysis of gradient lattice structure patterns for bone implant design

2020 ◽  
Vol 11 (4) ◽  
pp. 535-545
Author(s):  
Asliah Seharing ◽  
Abdul Hadi Azman ◽  
Shahrum Abdullah
Keyword(s):  
Finite Element Analysis ◽  
Relative Density ◽  
Mechanical Behaviour ◽  
Lattice Structure ◽  
Lattice Structures ◽  
Element Analysis ◽  
Bone Implant ◽  
Content Type ◽  
Octet Truss ◽  
Structure Patterns

PurposeThe objective of this paper is to identify suitable lattice structure patterns for the design of porous bone implants manufactured using additive manufacturing.Design/methodology/approachThe study serves to compare and analyse the mechanical behaviours between cubic and octet-truss gradient lattice structures. The method used was uniaxial compression simulations using finite element analysis to identify the translational displacements.FindingsFrom the simulation results, in comparison to the cubic lattice structure, the octet-truss lattice structure showed a significant difference in mechanical behaviour. In the same design space, the translational displacement for both lattice structures increased as the relative density decreased. Apart from the relative density, the microarchitecture of the lattice structure also influenced the mechanical behaviour of the gradient lattice structure.Research limitations/implicationsGradient lattice structures are suitable for bone implant applications because of the variation of pore sizes that mimic the natural bone structures. The complex geometry that gradient lattice structures possess can be manufactured using additive manufacturing technology.Originality/valueThe results demonstrated that the cubic gradient lattice structure has the best mechanical behaviour for bone implants with appropriate relative density and pore size.

Mechanical Behaviour of Three Dimensional Lattice Structures

2011 ◽  
Vol 462-463 ◽  
pp. 1302-1307
Author(s):  
Kuniharu Ushijima ◽  
Dai Heng Chen ◽  
Wesley J. Cantwell
Keyword(s):  
Mechanical Behaviour ◽  
Lattice Structure ◽  
Compressive Loading ◽  
Three Dimensional ◽  
Beam Theory ◽  
Lattice Structures ◽  
Initial Stiffness ◽  
Dimensional Lattice ◽  
Collapse Strength ◽  
The One

In this study, a theoretical analysis for predicting the mechanical properties of three dimensional lattice structures under compressive loading is proposed, and verified by comparing the analytical predictions with FEM results. This theory for estimating the initial stiffness E* is based on the classical beam theory, and the one for estimating the plastic collapse strength reflects the stress state for each lattice structure. In particular, effects of inner geometry (strand’s diameter-to-length ratio and micro-architecture) on the mechanical behaviour are discussed.

scholarly journals Graphene-Enriched Agglomerated Cork Material and Its Behaviour under Quasi-Static and Dynamic Loading

Materials ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 151 ◽  
Author(s):  
Mariusz Ptak ◽  
Paweł Kaczyński ◽  
Johannes Wilhelm ◽  
José M. T. Margarido ◽  
Paula A. A. P. Marques ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Beneficial Effect ◽  
Mechanical Behaviour ◽  
Mechanical Response ◽  
Compressive Loading ◽  
Environmental Concerns ◽  
Stress Plateau ◽  
Static And Dynamic Loading ◽  
Dynamic Compressive Loading ◽  
Graphene Nanoplates

The use of cork for a variety of applications has been gaining significance due to environmental concerns and political agendas. Consequently, its range of applications is growing rapidly. In this work, aiming to improve its mechanical response for crashworthiness applications, cork agglomerates were enriched by small quantities of graphene oxide or graphene nanoplates in order to observe a resulting improvement of the mechanical behaviour during quasi-static and dynamic compressive loading cases. To produce homogenous cork agglomerates including graphene, the material was previously dispersed into granulated cork using stirrers to achieve a good distribution. Then, the typical procedure of compression and curing was carried out. Magnified images attest a good dispersion of graphene into the cork matrix. Mechanical testing was performed for a variety of graphene concentrations (0.1, 0.5 and 1.0 weight %), becoming clear that the beneficial effect of including graphene (either oxide or nanoplates) is related to a later densification stage while keeping the same stress plateau levels.

scholarly journals Experimental and Numerical Evaluation of Mechanical Properties of 3D-Printed Stainless Steel 316L Lattice Structures

2021 ◽  
Author(s):  
M. Carraturo ◽  
G. Alaimo ◽  
S. Marconi ◽  
E. Negrello ◽  
E. Sgambitterra ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Mechanical Behavior ◽  
Numerical Simulations ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Lattice Structures ◽  
Stainless Steel 316L ◽  
Research Attention ◽  
Octet Truss

AbstractAdditive manufacturing (AM), and in particular selective laser melting (SLM) technology, allows to produce structural components made of lattice structures. These kinds of structures have received a lot of research attention over recent years due to their capacity to generate easy-to-manufacture and lightweight components with enhanced mechanical properties. Despite a large amount of work available in the literature, the prediction of the mechanical behavior of lattice structures is still an open issue for researchers. Numerical simulations can help to better understand the mechanical behavior of such a kind of structure without undergoing long and expensive experimental campaigns. In this work, we compare numerical and experimental results of a uniaxial tensile test for stainless steel 316L octet-truss lattice specimen. Numerical simulations are based on both the nominal as-designed geometry and the as-build geometry obtained through the analysis of µ-CT images. We find that the use of the as-build geometry is fundamental for an accurate prediction of the mechanical behavior of lattice structures.

Texture dependencies on flow stress behavior of magnesium alloy under dynamic compressive loading

Vacuum ◽  
2021 ◽  
pp. 110323
Author(s):  
Faisal Nazeer ◽  
Syed Zohaib Hassan Naqvi ◽  
Abul Kalam ◽  
A.G. Al-Sehemi ◽  
Hussein Alrobi
Keyword(s):  
Flow Stress ◽  
Magnesium Alloy ◽  
Compressive Loading ◽  
Stress Behavior ◽  
Flow Stress Behavior ◽  
Dynamic Compressive Loading

Plasticity and damage analysis of metal hollow sphere structures under dynamic compressive loading

2012 ◽  
Vol 3 (2) ◽  
pp. 101-117
Author(s):  
Luiz Antônio Bragança da Cunda ◽  
Branca Freitas de Oliveira ◽  
Guillermo Juan Creus
Keyword(s):  
Hollow Sphere ◽  
Compressive Loading ◽  
Damage Analysis ◽  
Dynamic Compressive Loading

Chondrons from articular cartilage: I. Immunolocalization of type VI collagen in the pericellular capsule of isolated canine tibial chondrons

1988 ◽  
Vol 90 (4) ◽  
pp. 635-643 ◽  
Author(s):  
C.A. Poole ◽  
S. Ayad ◽  
J.R. Schofield
Keyword(s):  
Articular Cartilage ◽  
Polyclonal Antibody ◽  
Compressive Loading ◽  
Rabbit Serum ◽  
Staining Reaction ◽  
Normal Rabbit Serum ◽  
Type Vi Collagen ◽  
Tibial Cartilage ◽  
Heterogenous Population ◽  
Dynamic Compressive Loading

A heterogenous population of intact chondrons extracted from low-speed homogenates of canine tibial cartilage were stained by indirect immunofluorescence methods with a polyclonal antibody to type VI collagen. In each of the four chondron groups examined, anti-(type VI collagen) anti-serum was concentrated in the capsule immediately adjacent to the chondrocyte complex. A constant but weaker fluorescent reaction persists in ‘tail-like’ extensions common to single and double chondrons and in the medial connections between adjacent chondrons in linear columns and aggregated clusters. Frayed collagen bundles typical of chondron preparations did not react with the antibody. Similarly, chondrons reacted with normal rabbit serum, or treated by type VI collagen extraction procedures, showed no staining reaction. The differential localization of type VI collagen in the pericellular capsule is discussed in relation to the maintenance of the chondron's integrity and to the protection of the chondrocyte during dynamic compressive loading.

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