The diagonal tensile strength of corner joints constructed with different connectors

Year 2024, Volume: 25 Issue: 4, 473 - 482, 28.12.2024

Halil Karatay , Merve Fatma Akbaş , Mesut Uysal

https://doi.org/10.18182/tjf.1511711

Abstract

This study aimed to investigate the strength and stiffness of corner joints for case furniture in the diagonal tension test. For this purpose, joint members were constructed with medium-density fiberboard (MDF) and particleboard (PB) with minifix, butterfly, and trapeze connectors. The study also observed the role of the end distance of the connectors, which was found to be a factor in joint strength and stiffness. According to the results, joints made of MDF performed 16 to 92 % better compared to PB, considering connectors on joints, which was evident due to material properties that MDF were denser by 7.5% and more strengthfull by 177% than PB. The butterfly connectors had the highest strength and stiffness regardless of material type and end distance, followed by trapeze connectors. The joints with minifix connectors had strength and stiffness of 2-3 times lower than others. Moreover, the end distance of 75 mm provided slightly higher joint strength and stiffness compared to those of 50 mm but was not statistically significant. Consequently, butterfly connectors demonstrated markedly the highest strength and stiffness for corner joints of case furniture. Furniture made of MDF should be chosen for higher durability rather than PB.

Keywords

Diagonal tension test, Corner joints, Knockdown connectors, End distance

Farklı bağlantı elemanları ile üretilmiş köşe birleştirmelerinin diyagonal çekme dayanımı

Abstract

Bu çalışmanın amacı kutu tipi mobilyaların köşe birleştirmelerinin diyagonal çekme testi altında dayanımını ve rijitliğini incelemektir. Bu doğrultuda, birleştirme, lif levha (MDF) ve yonga levha (YL) panelleri kullanılarak minifix, kelebek ve trapez bağlantı elemanlarıyla oluşturulmuştur. Ayrıca, bağlantı elemanlarının köşe birleştirme kenar mesafesi de gözlemlenmiştir. Çalışma sonuçlarına göre, MDF, YL’dan %7.5 daha yoğun ve %177 daha dayanıklı olmasından dolayı, bu malzeme ile yapılan birleştirmeler YL panelinden yapılan birleştirmelere göre kullanılan bağlantı elemanı dikkate alındığında %16 ila %92 arasında daha iyi performans göstermiştir. Kelebek bağlantı elemanları, malzeme türü ve köşe birleştirme kenar mesafesinden bağımsız olarak en yüksek dayanım ve rijitliğe sahiptir, trapez bağlantı elemanları onları takip etmektedir. Minifix bağlantı elemanlarıyla yapılan birleştirmeler diğerlerine göre 2-3 kat daha düşük dayanım ve rijitliğe sahiptir. Ayrıca, 75 mm köşe birleştirme kenar mesafesi, 50 mm olanlara göre biraz daha yüksek bir birleştirme dayanımı sağlamıştır ama istatistiksel olarak anlamlı değildir. Sonuç olarak, kutu tipi mobilyaların köşe birleştirmelerinde kelebek bağlantı elemanları belirgin bir şekilde en yüksek dayanımı ve rijitliğini göstermiştir. Mobilya yapımında MDF malzemesinin tercih edilmesi, YL malzemesine göre daha yüksek dayanıklılık sağlamaktadır.

Keywords

Diyagonal çekme testi, Köşe birleştirme, Demonte bağlantılar, Kenar mesafesi

References

• Dalvand, M., Ebrahimi, G., Tajvidi, M., Layeghi, M., 2014. Bending moment resistance of dowel corner joints in case-type furniture under diagonal compression load. Journal of Forestry Research, 25(4): 981-984. DOI: 10.1007/s11676-014-0481-y
• Demirci, S., Diler, H., Kasal, A., Erdil, Y. Z., 2020. Effects of wood species, number of teeth, and adhesive type on moment capacities of box-joints. Bioresources, 15(2): 3136-3146. DOI: 10.15376/biores.15.2.3136-3146
• Derikvand, M., Eckelman, C. A., 2015. Bending moment capacity of L-shaped mitered frame joints constructed of MDF and particleboard. Bioresources, 10(3): 5677-5690. DOI: 10.15376/biores.10.3.5677-5690
• Hajdarevic, S., Martinovic, S., 2015. The effect of dowel spacing on the stress and strain of case-type furniture corner joint. Proceedings of the 26th DAAAM International Symposium: Intelligent Manufacturing & Automation, 21-24 October, Zadar, Croatia, pp. 391-399.
• Karaman, A., 2020. The effect of fastener type (Clamex P14 and Tenso P14) and adhesive type on compression and tension performance. Journal of Bartin Faculty of Forestry, 22(1): 144-152. DOI: 10.24011/barofd.679997
• Karaman, A., 2021. An investigation on the effects of wooden species of dowels and the end distance of catch connectors (Clamexp14) on the bending moment of L-type corner joints for RTA (ready to assemble) furniture. Wood and Fiber Science, 53(1): 48-61.
• Kasal, A., Smardzewski, J., Kuskun, T., Guray, E., 2023. Analyses of L-type corner joints connected with auxetic dowels for case furniture. Materials, 16(13): 4547. DOI: 10.3390/ma16134547
• Klos, R., Langova, N., 2023. Determination of reliability of selected case furniture constructions. Applied Sciences, 13: 4587. DOI: 10.3390/app13074587
• Krzyzaniak, L., Smardzewski, J., 2019. Strength and stiffness of new designed externally invisible and demountable joints for furniture cases. Engineering Structures, 199: 109674. DOI: 10.1016/j.engstruct.2019.109674
• Krzyzaniak, L., Smardzewski, J., 2021. Impact damage response of L-type corner joints connected with new innovative furniture fasteners in wood-based composites panels. Composite Structures, 255: 113008. DOI: 10.1016/j.compstruct.2020. 113008 Kuskun, T., Kasal, A., Caglayan, G., Ceylan, E., Bulca, M., Smardzewski, J., 2023. Optimization of the cross-sectional geometry of auxetic dowels for furniture joints. Materials, 16: 2838. DOI: 10.3390/ma16072838
• Liu, W. Q., Eckelman, C. A., 1998. Effect of number of fasteners on the strength of corner joints for cases. Forest Products Journal, 48(1): 93-95.
• Malkacoglu, A., Cetin Yerlikaya, N., Cakıroglu, F. L., 2013. Effects of number and distance between dowels of ready-to-assemble furniture on bending moment resistance of corner joints. Wood Research, 58(2): 671-680.
• Petrova, B., Jivkov, V., Yavorov, N., 2023. Possibilities for efficient furniture construction made of thin and ultra-thin materials by using mitre joints. Materials, 16: 6855. DOI: 10.3390/ma16216855
• Simek, M., Haviarova, E., Eckelman, C. A., 2008. The end distance effect of knock-down furniture fasteners on bending moment resistance of corner joints. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunnensis, 56(2): 203-210.
• Smietanska, K., Mielczarek, M., 2022. Strength properties of furniture corner joints constructed with different wooden connectors and wood-based materials. Annals of Warsaw University of Life Sciences - SGGW, Forest and Wood Technology, 118: 56-66.
• TS EN 310, 1999. Ahşap esaslı levhalar-Eğilme dayanımı ve eğilme elastikiyet modülünün tayini, TSE, Ankara.
• TS EN 323, 1999. Ahşap esaslı levhalar – Birim hacim ağırlığının tayini. TSE, Ankara
• TS EN 326-1, 1999. Ahşap esaslı levhalar – Numune alma, kesme ve muayene. TSE, Ankara
• Yerlikaya, N. Ç., Aktaş, A., 2012. Enhancement of load-carrying capacity of corner joints in case-type furniture. Materials & Design, 37: 393-401.
• Yuksel, M., Kasal, A., Erdil, Y. Z., Acar, M., Kuskun, T., 2015. Effects of the panel and fastener type on bending moment capacity of L-type joints for furniture cases. ProLigno, 11(4): 426-431.
• Zhang, J. L., Eckelman, C. A., 1993. Rational design of multi-dowel corner joints in case construction. Forest Products Journal, 43(11/12): 52-58.