The Experimental and Finite Element Analysis of Diagonal Tensile Tests Conducted on Frame-Type Constructed Corner … (original) (raw)
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In this study, the failure loads of L-type corner joints in case-type furniture have been analyzed experimentally and statistically in laminated medium-density fiberboard material. The failure loads of five corner joints have been analyzed experimentally under tension and compression moments; these joint types are glass-fiber composite layer (C), dowel (D), dowel + composite layer (DC), dowel + minifix (DM), and dowel + minifix + composite layer (DMC). The test results were analyzed statistically by Weibull distribution to obtain a 95% reliability level for failure load. Tests were carried out according to ASTM Standards. Results show that the failure load takes its highest value in the DMC case for both average values of the test results and for 95% reliability under Weibull distribution. On the other hand, it takes its lowest value in the D case. In addition, the 95% reliability value for each corner joint configuration is approximately equivalent to the 0.53 average value of the failure load.
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Th e goal of this study was to introduce a method for estimating stress analysis as an effi cient procedure for evaluating the strength of mitered corner joints in furniture structures. Tests were carried out to determine the eff ects of panel type, distance between the centers of dovetail holes and the edges of joints (10, 20, and 30 mm), and type of dovetail key on the load-carrying capacity of mitered corner joints under a diagonal tension load. Specimens were constructed of overlaid medium-density fi berboard (LamMDF) and particleboard (LamPb) and connected with butterfl y and H-shaped dovetail keys. Polyvinyl acetate adhesive was used to assemble the joints. Specimens were tested under diagonal tension loads and the corresponding combined stress analysis was conducted using the following formulas: Total stress at the outer edge, Total stress at the inner edge, where σb is bending stress, σa is axial stress, P is axial failure load, L is half of the span length, and t and b are the thickness and width of the joint members. Test results showed that corner joints constructed of LamMDF were 13% stronger than joints constructed of LamPb. For the specimens constructed of both panel types, a 10-mm distance between the dovetail holes and the edges of joints gave better results than distances of 20 and 30 mm. No signifi cant diff erences were observed between the 2 types of dovetail keys. Total compression stresses at the outer edge were 2 times greater than the total tension stresses at the inner edge of the joints.
Journal of Forestry Research, 2013
This study was conducted to analyze the effect of joint type, and numbers and types of dovetail keys on diagonal tension and compression performance of corner joints in a furniture frame. Joint members were cut from white fir lumber. Butted and mitered joints were constructed with one and two dovetail key(s) with butterfly and H shapes. Joints were glued by polyvinyl acetate (PVAc) and cynoacrylate (CA). Compression capacity of joints was higher than diagonal tension. Mitered joints were stronger than butted ones. Butterfly dovetail keys were superior to H shape keys. Double keys performed better than single key. Experimental joints glued with PVAc were stronger than those glued with CA glue and control specimens. In terms of strength, butterfly dovetailed joints were comparable with doweled joints.
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The objective of the study was to determine the mechanical performance of L-type joints and chairs produced using mortise-tenon and dowel-joint techniques by diagonal compression tests and diagonal tensile tests. Two types of corner-joints were prepared from beech wood at the laboratory, which was mortise-tenon and dowel joints. Two grooved dowels were used in the dowel joints. The corner-joint samples were subjected to diagonal compression and tensile tests at the universal testing machine. The chairs were produced from these corner-joints, and their mechanical performance tested using furniture test equipment in accordance with EN 1728 standard. The mortise-tenon joint in the diagonal tensile testing had the highest bending moment with an average value of 673.28 Nm while the dowel-joint had the lowest bending moment in the diagonal compression testing with an average value of 75.36 Nm. A load-bearing capacity of 673.28 Nm was obtained from diagonal tensile testing, and 95.54 Nm wa...
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The strength determination of corner joints used for wooden windows
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology, 2015
The Strength Determination of Corner joints used for Wooden Windows. The work is aimed at the methodical procedure assessment of rectangular corner joints applied on window casement and its strength. Mechanical properties of testing samples are further evaluated by universal testing machine. For this reason a component necessary for fixing corner joints has been designed. The testing samples are loaded by bending moment with tensile and compressive forces. The values obtained in testing are further used in final equations for calculating the values of joint stiffness and bending moment capacity of which will help to decide which joint is preferable for construction applications.
ANALYSIS OF THE BENDING MOMENT OF INNOVATIVE CORNER JOINTS DURING STATIC TESTING
The aim of this work is to produce and test innovative corner joints models in laboratory conditions, using discursive construction methods, and to statistically evaluate the achieved results in order to gain scientifically needed criteria according to which it will be possible to evaluate the level of quality of chairs made of beech wood. The research consisted of three groups of innovative corner construction types -joints that were tested in a laboratory and ranked to determine the key criteria for static loads.