Open Access Open Access  Restricted Access Subscription Access

Viscoelastic Responses of MDF Kerf Structures

ARYABHAT DARNAL, ZARYAB SHAHID, JIWAN HAN, MICHAEL MORENO, ANASTASIA MULIANA

Abstract


Medium-density fiberboard (MDF), comprised of chopped wood fibers and epoxy resin is commonly used in building construction. Given the current trend in freeform architecture, there is a need to generate complex geometric structures out of common construction materials. In this study, kerfing (relief cutting) method is used to create flexible and moldable shapes out of relatively rigid wood panels. The kerf panels can be easily formed into various complex shapes for outdoor facades and/or indoor paneling. The natural wood fibers and epoxy resin in MDF combine to produce a viscoelastic composite material that exhibits time-dependent changes in mechanical behavior, i.e., material stiffness/compliance. The work described herein comes from a study designed to develop a better understanding of the viscoelastic response of kerf unit cells and panels. Experimental creep tests were performed on dog-bone specimens under uniaxial loading conditions1in order to determine the viscoelastic response of the MDF. The experimental results were used to develop a model to be used in simulations. The simulations were carried out on a kerf unit cell, e.g., a square interlocked kerf, and kerf structures of complex geometries in order to investigate the time-dependent changes in the deformations of the kerf structures. From this study, a systematic design of kerf panels with complex shapes will be developed in order to minimize the time-dependent changes of kerf structures.


DOI
10.12783/asc36/35749

Full Text:

PDF

References


Ivanišević, D. “Super flexible laser cut plywood.” koFAKTORlab, 2014,

http://lab.kofaktor.hr/en/portfolio/super-flexible-laser-cut-plywood

Guzelci, O. Z., Alaçam, S., & Bacınoğlu, S. Z. 2017."Interlocked archimedean spirals for

conversion of planar rigid panels into locally flexible panels with stiffness control."

Computers & Graphics 66: 93-107.

Kalantar, N., & Borhani, A. 2018. “Informing Deformable Formworks-Parameterizing

Deformation Behavior of a Non-Stretchable Membrane via Kerfing.”

Chen, R., Turman, C., Jiang, M., Kalantar, N., Moreno, M., & Muliana, A. 2020.

“Mechanics of kerf patterns for creating freeform structures.” Acta Mechanica, 231(9),

-3524.

Shahid, Z., Hubbard Jr, J. E., Kalantar N., Muliana, A. 2021. “An Investigation of

Dynamics Responses of Architectural Kerf Structures.” (Submitted)

Shahid, Z., Johnson M. S., Bond. C. G., Hubbard Jr, J. E., Muliana, A. 2021. “Dynamic

Responses of Architectural Kerf Structures.” (Submitted)

Sliseris, J., Andrä, H., Kabel, M., Dix, B., & Plinke, B. 2017. “Virtual characterization of

MDF fiber network.” European Journal of Wood and Wood Products, 75(3), 397-407.

Seco, J. F. G., & Barra, M. D.1998. “Long-term deformation of MDF panels under

alternating humidity conditions.” Wood science and technology, 32(1), 33-41.

Zhang, H., Hunt, J. F., & Huang, Y. 2014. “Detection and analysis of the stress relaxation

properties of thin wood composites using cantilever beam bending.” In Proceedings of the

th International Nondestructive Testing and Evaluation of Wood Symposium. General

Technical Report FPL-GTR (Vol. 226, pp. 309-316).

Muliana, A., Nair, A., Khan, K. A., & Wagner, S. 2006. “Characterization of thermomechanical

and long-term behaviors of multi-layered composite materials.” Composites

science and technology, 66(15), 2907-2924.

Schapery, R. A. 1969. “On the characterization of nonlinear viscoelastic materials.”

Polymer Engineering & Science, 9(4), 295-310.

Tscharnuter, D., & Muliana, A. 2013. “Nonlinear response of viscoelastic

polyoxymethylene (POM) at elevated temperatures.” Polymer, 54(3), 1208-1217.

Zarrinmehr, S., Akleman, E., Ettehad, M., Kalantar, N., & Borhani, A. 2017. “Kerfing with

generalized 2D meander-patterns: conversion of planar rigid panels into locally-flexible

panels with stiffness control.”


Refbacks

  • There are currently no refbacks.