Construction of Wood-Based Lamella for Increased Load on Seating Furniture

Abstract

The research on population shows that the count of overweight people has been constantly growing. Therefore, designing and modifying utility items, e.g., furniture should be brought into focus. Indeed, furniture function and safety is associated with the weight of a user. Current processes and standards dealing with the design of seating furniture do not meet the requirements of overweight users. The research is aimed at designing flexible chairs consisting of lamellae using the finite element method (FEM). Three types of glued lamellae based on wood with different number of layers and thickness were made and subsequently, their mechanical properties were tested. Values for modulus of elasticity and modulus of rupture were used to determine stress and deformation applying the FEM method for modelling flexible chairs. In this research, the methodology for evaluating the ultimate state of flexible chairs used to analyse deformation and stability was defined. The analysis confirms that several designed constructions meet the requirements of actual standards (valid for the weight of a user up to 110 kg) but fail to meet the requirements for weight gain of a population.

What Is the Supply and Demand for Coloured Wood Products? An Empirical Study in Slovakian Practice

“…Detailed results are presented in the following figure. The achieved results are also supported by the research of several authors [46][47][48][49][50], who evaluate Slovakia to be independent in terms of wood production. The area of forest land in the Slovak Republic currently represents 41.2% of the total area of the state.…”

“…The innovative way of wood treatment by hydrothermal regulation by steaming or cooking in order to change the colour tone is actually used by 53.48% of Slovak WFEs, 10.70% of respondents know this type of wood treatment but do not use it and up to 35.82% of WFEs have never heard about this method of wood treatment. In case of wood treatment by the process of steaming, according to [48,50,51], it is necessary to observe parameters that influence this process. It is essential to set and maintain the temperature, pressure and vacuum in the steaming equipment.…”

“…As Slovakia is independent in terms of wood production, the demand for WFPs from domestic woody plants (e.g., spruce, cherry, maple, oak, birch, pine, beech, etc.) is dominant [50,54,61]. willing to pay extra for real mahogany wood.…”

Design issues of innovative furniture fasteners for wood-based boards

“…Furniture fasteners should contain joints with features that are beneficial to furniture users and manufacturers. A furniture user expects aesthetics values, functionality, and reliability, while a manufacturer expects low cost of manufacture, the versatility of application, load capacity, durability, and easy installation (Eckelman 1978;Bartashevich and Trofimov 2006;Smardzewski 2015;Podskarbi et al 2016;Hitka et al 2018;Langova et al 2019;Máchová et al 2019). The complex load in combination with the specific material properties of wood-based boards results in semi-rigid characteristic of furniture joints in frameless furniture (Joščák 2000;Branowski and Pohl 2004;Joščák and Langová 2018).…”

Hardness and Roughness of Overlaid Wood Composites Exposed to a High-Humidity Environment

“…These products can be made in different thicknesses, grades, sizes, and may present different degrees of exposure durability. They can be found in diverse array of applications, from industrial scale to small home projects [1][2][3][4].…”