VISCOELASTIC RESPONSES OF MDF KERF STRUCTURES
VISCOELASTIC RESPONSES OF MDF KERF STRUCTURES
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MDF 切口结构的粘弹性响应
DOI：
10.12783/asc36/35749
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Nastasia Muliana
中科院分区：
文献类型：
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作者：
Aryabhat Darnal;Zaryab Shahid;Ji;M. Moreno;Nastasia Muliana
中密度纤维板（MDF）是一种常用的建筑材料，由木材纤维和环氧树脂组成。考虑到自由形式建筑的当前趋势，需要用普通的建筑材料生成复杂的几何结构。在这项研究中，使用刻纹（浮雕切割）方法将相对坚硬的木板制成灵活的、可成型的形状。切缝板可以很容易地形成各种复杂的形状，用于室外立面和/或室内镶板。中密度纤维板中的天然木纤维和环氧树脂结合在一起，产生粘弹性复合材料，其机械性能随时间变化，即材料刚度/顺应性。本文所描述的工作来自一项研究，旨在更好地理解切口单元细胞和面板的粘弹性响应。为了确定MDF的粘弹性响应，对狗骨试件进行了单轴加载条件下的蠕变试验。利用实验结果建立了仿真模型。通过对方形互锁切缝单元细胞和复杂几何形状的切缝结构进行仿真，研究了切缝结构变形随时间的变化规律。通过本研究，将开发具有复杂形状的切口板的系统设计，以最大限度地减少切口结构的随时间变化。
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.