Three-dimensional lattices have applications across a range of fields including structural lightweighting, impact absorption and biomedicine. In this work, based on triply periodic minimal surfaces were produced by polymer additive manufacturing examined with combination experimental computational methods. This investigation elucidates their deformation mechanisms provides numerical parameters crucial in establishing relationships between geometries mechanical performance. Three types...

Lattice structures are excellent candidates for lightweight, energy absorbing applications such as personal protective equipment. In this paper we explore several important aspects of lattice design and production by metal additive manufacturing, including the choice cell size application a post-manufacture heat treatment. Key results include characterisation failure modes in double gyroid lattices made Al-Si10-Mg, elimination brittle fracture low-strain treatment, calculation specific...

In this paper we present a numerical investigation into surface-based lattice structures with the aim of facilitating their design for additive manufacturing. We give surface equations these and show how they can be used to tailor volume fractions. Finite element analysis is investigate effect cell type, orientation fraction on elastic moduli structures, giving rise valuable set parameters which provide specified stiffness. find I-WP in [001] provides highest stiffness along single loading...

Lattice structures are regarded as excellent candidates for use in lightweight energy-absorbing applications, such crash protection. In this paper we investigate the crushing behaviour, mechanical properties and energy absorption of lattices made by an additive manufacturing process. Two types lattice were examined: body-centred-cubic (BCC) a reinforced variant called BCC z . The subject to compressive loads two orthogonal directions, allowing assessment their anisotropy be made. We also...

Summary This life cycle assessment measured environmental impacts of selective laser melting, to determine where most arise: machine and supporting hardware; aluminum powder material used; or electricity used print. Machine were calculated by generating inventories materials processing; use was in‐line power meter; transport disposal also assessed. Impacts as energy (megajoules; MJ), ReCiPe Europe Midpoint H, Endpoint H/A. Previous research has shown that the efficiency additive...

This paper presents the design, analysis and experimental verification of strut-based lattice structures to enhance mechanical vibration isolation properties a machine frame, whilst also conserving its structural integrity. In addition, design parameters that correlate lattices, with fixed volume similar material, natural frequency integrity are presented. To achieve high efficiency conserve integrity, trade-off needs be made between frame’s compressive strength. The total area moment...

Periodic honeycombs have been used for their high strength, low weight and multifunctionality. The quasi-static dynamic compressive responses of three types additively manufactured AlSi10Mg honeycomb structures, specifically a single-scale two hierarchical with levels hierarchy, respectively, investigated using experimental measurement finite element (FE) simulations. validated FE simulation has employed to investigate the effects relative density key parameters. following failure modes...

Abstract Recent advances in additive manufacturing have enabled fabrication of phononic crystals and metamaterials which exhibit spectral gaps, or stopbands, the propagation elastic waves is prohibited by Bragg scattering local resonance effects. Due to high level design freedom available manufacturing, properties are tunable through periodic cell. In this paper, we outline a new approach for incorporating internal resonators, provide numerical experimental evidence that stopband exists over...

The thermal conductivity of AlSi10Mg made by laser powder bed fusion (LPBF), and its modification via heat treatment, has received little attention despite possible applications for exchangers thermo-mechanical components. Here, we show that treatment can increase the LPBF to cast material. Our results indicate post-manufacture annealing eliminates anisotropy present in as-built condition, enhances close 30 % transverse direction (perpendicular build orientation). A solution increases...

In this paper, the phonon dispersion curves of several surface-based lattices are examined, and their energy transmission spectra, along with corresponding bandgaps identified. We demonstrate that these may be controlled, or tuned, through choice cell type, size volume fraction. Our results include two findings high relevance to designers lattice structures: (i) network matrix phase gyroid structures develop below 15 kHz while diamond do not, (ii) bandwidth a bandgap in can tuned by...

The stiffness, anisotropy and structural deformation of three gyroid-based lattices was investigated, with particular focus on a newly proposed honeycomb gyroid. This is based modified triply periodic minimal surface (TPMS) equation reduced periodicity. Using the numerical homogenisation method, gyroid lattice types found to differ greatly, as dependence this volume fraction. From compression testing laser sintered polyamide PA2200 specimens, possess extremely high anisotropy, Emax*/Emin*,...

We present the design and characterisation of a high-speed sintering additive manufacturing benchmarking artefact following design-for-metrology approach. In an important improvement over conventional approaches, specifications operating principles instruments that would be used to measure manufactured were taken into account during its process. With methodology, we aim improve facilitate measurements on parts produced using manufacturing. The has number geometrical features, including...

Lattice structures are an important aspect of design for additive manufacturing (DfAM). They enable significant component light-weighting and the tailoring a wide range physical responses; mechanical, thermal, acoustic, etc. In turn, lattice relies on fundamental research to uncover useful structure-property relationships, such as influence cell geometry volume fraction. A number commercial computer-aided-design (CAD) programs exist that offer generation, but these tend prioritise product...