Abstract Additive manufacturing (AM) of polymer large parts is a technological research area with great growth potential if the main barriers to its implementation are successfully addressed. In this research, review large-format AM (LFAM) processes for polymers presented, followed by market concerning identification commercial printers. An overview was performed covering current LFAM systems configurations and their control aspects. The design modelling approaches related fabrication AM,...

This work aims to determine the influence of fused deposition modeling (FDM) printing parameters on mechanical properties parts fabricated an Ultimaker2 printer with acrylonitrile butadiene styrene (ABS). The effect several such as interlayer cooling time (ILCT), nozzle diameter, infill density, raster angle and layer thickness ultimate tensile strength, yield elastic modulus produced was evaluated. Two independent studies were conducted: a first study dedicated ILCT second where other...

Purpose The purpose of this paper is to investigate the effect a sealing protective treatment on water absorption and mechanical properties acrylonitrile butadiene styrene (ABS)-printed parts by fused deposition modelling. Protective products include aqueous acetone solutions with different concentrations, polyurethane wood sealer acrylic-based varnish. Design/methodology/approach Open porosity was estimated coefficient total amount retained, obtained from tests. Mechanical characterization...

In this paper, we conduct a brief revision of the state-of-the-art on vegetable fibre-reinforced composite applications in automotive industry. We then present some results for dynamic characterisation an auto part made jute fibres and equivalent one traditional glass fibres, where increase damping is most evident. An inverse method based free vibration response plate specimens also applied to estimate damped material parameters composites. The obtained are compared with ones fibre future...

Wood waste holds surprisingly diverse potential. From trimmings and offcuts to shavings sawdust, each form can be repurposed in various ways. While converting wood into energy pellets through combustion is common, its applications extend far beyond fuel. Particleboard panels offer an environmentally friendly solution by repurposing rather than incinerating it. To promote sustainability align with carbon neutrality goals, replacing traditional fossil-based binders bio-based alternatives...

Sandwich structures are frequently used in automotive, aerospace and marine industries, as they provide adequate functional properties. The two-dimensional regular hexagonal cell shape, i.e. honeycomb is the most core structure sandwich panels. Recently, a new type of cellular composed lattice struts has been proposed, combine high stiffness, strength energy absorption with low weight. main purpose this research to investigate effect topology on flexural behaviour Five geometries inspired...

The transmissibility concept may be generalized to multi‐degree‐of‐freedom systems with multiple random excitations. This generalization involves the definition of a matrix, relating two sets responses when structure is subjected excitation at given set coordinates. Applying such an experimental example easiest way validate this method.

Composite sandwich materials are very common in structural uses for a wide range of applications the aerospace and automotive industry that require low weight, high bending strength, energy absorption. In general, core structures has two-dimensional cellular structure, with regular honeycomb geometry. While standard manufacturing processes geometric limited, emergence additive provides alternatives to conventional designs. The aim this work is analyze evaluate effect geometry on flexural...

The aim of this research paper is to formulate a road map for implementation lean techniques within SMEs product development (PD) teams, identifying barriers change and explaining possible drivers successful implementation. methodology necessary develop the - IPID cycle combination different approaches. It combines literature review, an initial quantitative study with questionnaires, informal interviews direct observation companies' practices five manufacturing companies organised in...

Sandwich panels are widely used in many engineering applications where saving weight while maintaining high strength and stiffness is required. The most common core structure sandwich the two-dimensional regular hexagonal cell shape, denoted as Honeycomb. In recent times, bioinspired materials structures have become increasingly attractive to researchers, they provide adequate functional properties. goal of present work study two new aimed at improving performance panel cores. Among all...

The dynamic response of a structure can be described by both its translational and rotational receptances. latter ones are frequently not considered because the difficulties in applying pure moment excitation or measuring rotations. However, general, this implies reduction up to 75% complete model. On other hand, if modification includes inertia, receptances unmodified system needed. In one method, more commonly found literature, so called T‐block is attached structure. Then, force, applied...