DETERMINATION OF THE STRAINS DEVELOPED IN FURNITURE PARTS MADE OF GLASS FIBRES COMPOSITE MATERIALS

Abstract

The paper shows the results experimentally obtained concerning to the strains developed in the seat -backrest part of a chair. This component was made of an hybrid composite material reinforced with both glass fabric and wood flour. The resistive tensometry method was used to measure the strains developed in the seat-backrest. Therefore, some strain gage rosettes 0/45/90 and two universal amplifier elements MX840 with eight channels were used for data acquisition. The numerical analysis shows that the greatest values of the stresses develop in the seat part of the component made of composite material. Taking into account these results, the chair was mechanically loaded just on the seat part by using the test weights. Finally, the values of strains experimentally measured were compared with the ones obtained by numerical modeling with the finite element method (FEM).