The effects of non-periodic microstructure and defects on the compressive strength of two-dimensional cellular solids

1997 ◽  
Vol 39 (5) ◽  
pp. 549-563 ◽  
Author(s):  
Matthew J. Silva ◽  
Lorna J. Gibson
Keyword(s):  
Compressive Strength ◽  
Cellular Solids ◽  
Two Dimensional ◽  
Periodic Microstructure

Effect of micro in-plane fiber waviness on compressive properties of unidirectional fabric composites

2017 ◽  
Vol 52 (15) ◽  
pp. 2065-2074 ◽  
Author(s):  
Bo Wang ◽  
Nobuhide Uda ◽  
Kousei Ono ◽  
Hiroto Nagai
Keyword(s):  
Compressive Strength ◽  
Numerical Model ◽  
Tensile Stress ◽  
Compressive Modulus ◽  
Two Dimensional ◽  
Compressive Properties ◽  
Fiber Waviness ◽  
Experimental Part ◽  
Fabric Composites ◽  
Vartm Process

In this paper, a combination of experimentation and analysis is used to study the effect of micro in-plane fiber waviness on the compressive properties of unidirectional fabric composites. The experimental part includes a measurement of the micro in-plane fiber waviness in two types of unidirectional fabrics, manufacturing composites with each unidirectional fabric via VaRTM process and tests for establishing the compressive modulus and strengths of the composites. The compressive strengths were confirmed to be affected by the micro in-plane fiber waviness, but the compressive modulus was not. Furthermore, a two-dimensional numerical model is proposed to explain our experimental results. The numerical results indicate that the tensile stress (owing to the micro in-plane fiber waviness) and compressive stress along the weft and warp directions, respectively, of the composite lead to reductions in the compressive strength.

scholarly journals Stiffness and strength of a semi-regular lattice

2017 ◽  
Vol 50 (3) ◽  
pp. 137-140
Author(s):  
Tomas Their ◽  
Luc St-Pierre
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
High Strength ◽  
Elastic Buckling ◽  
Low Density ◽  
Two Dimensional ◽  
Regular Lattice ◽  
Dimensional Lattice ◽  
Lattice Materials ◽  
Analytical Expressions

Honeycombs and other lattice materials have the advantage that their topology can be designed to achieve unique combinations of properties, such as high strength at low density.  The work presented here is exploratory in nature: we investigated the mechanical properties of a two-dimensional lattice and compared its performances to other topologies.  Analytical expressions for the uniaxial stiffness and compressive strength were developed and validated against Finite Element simulations.  The results showed that the lattice considered is stiffer and stronger than the diamond lattice, and has a higher resistance to elastic buckling than the triangular lattice.  

scholarly journals 3D–2D analysis of a thin film with periodic microstructure

2006 ◽  
Vol 136 (2) ◽  
pp. 223-243 ◽  
Author(s):  
Jean-François Babadjian ◽  
Margarida Baía
Keyword(s):  
Thin Film ◽  
Convergence Analysis ◽  
Dimensional Reduction ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Analysis Techniques ◽  
Periodic Microstructure ◽  
Γ Convergence

In this article we study the behaviour of a heterogeneous thin film whose microstructure oscillates on a scale that is comparable to that of the thickness of the domain. The argument is based on a three-dimensional–two-dimensional reduction through a Γ-convergence analysis, techniques of two-scale convergence and a decoupling procedure between the oscillating variable and the in-plane variable.

Cellular Ti6Al4V with carbon nanotube-like structures fabricated by selective electron beam melting

2014 ◽  
Vol 20 (6) ◽  
pp. 541-550 ◽  
Author(s):  
Yujie Quan ◽  
Philipp Drescher ◽  
Faming Zhang ◽  
Eberhard Burkel ◽  
Hermann Seitz
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Electron Beam ◽  
Carbon Nanotube ◽  
Young’S Modulus ◽  
Electron Beam Melting ◽  
Young's Modulus ◽  
Cellular Solids ◽  
Content Type ◽  
Selective Electron Beam Melting

Purpose – The purpose of this paper is to fabricate cellular Ti6Al4V with carbon nanotube (CNT)-like structures by selective electron beam melting and study the resultant mechanical properties based on each respective geometry to provide fundamental information for optimizing molecular architectures and predicting the mechanical properties of cellular solids. Design/methodology/approach – Cellular Ti6Al4V with CNT-like zigzag and armchair structures are fabricated by selected electron beam melting. The microstructures and mechanical properties of these samples are evaluated utilizing scanning electron microscopy, synchrotron radiation X-ray and compressive tests. Findings – The mechanical properties of the cellular solids depend on the geometry of strut architectures. The armchair-structured Ti6Al4V samples exhibit Young’s modulus from 501.10 to 707.60 MPa and compressive strength from 8.73 to 13.45 MPa. The zigzag structured samples demonstrate Young’s modulus from 548.19 to 829.58 MPa and compressive strength from 9.32 to 16.21 MPa. The results suggest that the zigzag structure of the Ti6Al4V cellular solids can achieve improved mechanical properties and the mechanism for the enhanced mechanical properties in the zigzag structures was revealed. Originality/value – The results provide an innovative example for modulating the mechanical properties of cellular titanium by adjusting the unit cell geometry. The Ti6Al4V cellular solids with single-walled CNT-like structures could be used as light-weight construction components or filters in industries. The Ti6Al4V with multiwalled CNT-like structures could be used as new scaffolds for biomedical applications.

scholarly journals Collapse response of two-dimensional cellular solids by plasticity and cracking: application to wood

2019 ◽  
Vol 219 (2) ◽  
pp. 221-244 ◽  
Author(s):  
I. C. Scheperboer ◽  
A. S. J. Suiker ◽  
R. A. Luimes ◽  
E. Bosco ◽  
A. J. M. Jorissen
Keyword(s):  
Cellular Solids ◽  
Two Dimensional
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