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Title of Journal: Exp Mech

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Abbravation: Experimental Mechanics

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Springer US

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DOI

10.1006/jcis.1994.1273

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1741-2765

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Mechanical Properties of Ti6Al4V Selectively Las

Authors: I Maskery AO Aremu M Simonelli C Tuck RD Wildman IA Ashcroft RJM Hague
Publish Date: 2015/04/24
Volume: 55, Issue: 7, Pages: 1261-1272
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Abstract

Significant weight savings in parts can be made through the use of additive manufacture AM a process which enables the construction of more complex geometries such as functionally graded lattices than can be achieved conventionally The existing framework describing the mechanical properties of lattices places strong emphasis on one property the relative density of the repeating cells but there are other properties to consider if lattices are to be used effectively In this work we explore the effects of cell size and number of cells attempting to construct more complete models for the mechanical performance of lattices This was achieved by examining the modulus and ultimate tensile strength of latticed tensile specimens with a range of unit cell sizes and fixed relative density Understanding how these mechanical properties depend upon the lattice design variables is crucial for the development of design tools such as finite element methods that deliver the best performance from AM latticed parts We observed significant reductions in modulus and strength with increasing cell size and these reductions cannot be explained by increasing strut porosity as has previously been suggested We obtained power law relationships for the mechanical properties of the latticed specimens as a function of cell size which are similar in form to the existing laws for the relative density dependence These can be used to predict the properties of latticed column structures comprised of bodycentredcubic BCC cells and may also be adapted for other part geometries In addition we propose a novel way to analyse the tensile modulus data which considers a relative lattice cell size rather than an absolute size This may lead to more general models for the mechanical properties of lattice structures applicable to parts of varying sizeWe would like to thank Sean Smith Ravi Aswathanarayanaswamy Hossein SheykhPoor and various teams at Renishaw Plc for the provision of the test specimens and continued support in our collaborative projects Thanks also to Mark East Mark Hardy and Joe White technicians of the Additive Manufacture and 3D Printing Research Group at Nottingham Funding was provided by Innovate UK formerly the UK Technology Strategy Board TSB


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Other Papers In This Journal:

  1. Internal Deformation Measurement of Polymer Bonded Sugar in Compression by Digital Volume Correlation of In - situ Tomography
  2. Dynamic Separation of Resistance Spot Welded Joints: Part II—Analysis of Test Results and a Model
  3. Hydrodynamic Interactions at Low Reynolds Number
  4. Impact of Experimental Uncertainties on the Identification of Mechanical Material Properties using DIC
  5. New Developments in Proton Radiography at the Los Alamos Neutron Science Center (LANSCE)
  6. A Tensile Split Hopkinson Bar for Testing Particulate Polymer Composites Under Elevated Rates of Loading
  7. Hybrid Thermoelastic Stress Analysis of a Pinned Joint
  8. Experimental Testing of a Moving Force Identification Bridge Weigh-in-Motion Algorithm
  9. Sensitivity to Axial Stress of Electro-Mechanical Impedance Measurements
  10. Accuracy of the Sampling Moiré Method and its Application to Deflection Measurements of Large-Scale Structures
  11. Modification of the Shear-Compression Specimen for Large Strain Testing
  12. Analysis of Cracks and Deformations in a Full Scale Reinforced Concrete Beam Using a Digital Image Correlation Technique
  13. Slip Damping Mechanism in Welded Structures Using Response Surface Methodology
  14. Effect of Varying Test Parameters on Elastic–plastic Properties Extracted by Nanoindentation Tests
  15. Application of Digital Image Correlation (DIC) in Dynamic Notched Semi-Circular Bend (NSCB) Tests
  16. Experimental Methodology for Studying Strain Heterogeneity with Microstructural Data from High Temperature Deformation
  17. Tailoring Beam Mechanics Towards Enhancing Detection of Hazardous Biological Species
  18. Strain Measurements Through Optimized Particle Tracking in Volumetric Images: Methodology and Error Assessment
  19. Comparison between Digital Fresnel Holography and Digital Image-Plane Holography: The Role of the Imaging Aperture
  20. Principle and Experimental Validation of a new Apparatus Allowing Large Deformation in Pure Bending: Application to thin Wire
  21. Dynamic Separation of Resistance Spot Welded Joints: Part I—Experiments
  22. Non-Newtonian Behavior of Ballistic Gelatin at High Shear Rates
  23. Designing a Uniaxial Tension/Compression Test for Springback Analysis in High-Strength Steel Sheets
  24. A Hybrid Wavelet Based–Approach and Genetic Algorithm to Detect Damage in Beam-Like Structures without Baseline Data

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