Design, Fabrication, Evaluation, and Testing of Multilayered Wood-Based Composite Sandwich Panels

Released on by Mostafa Mohammadabadi
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  • Design, Fabrication, Evaluation, and Testing of Multilayered Wood-Based Composite Sandwich Panels Book Detail

  • Author : Mostafa Mohammadabadi
  • Release Date : 2020
  • Publisher :
  • Genre : Engineered wood
  • Pages : 264
  • ISBN 13 :
  • File Size : 25,25 MB
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Design, Fabrication, Evaluation, and Testing of Multilayered Wood-Based Composite Sandwich Panels by Mostafa Mohammadabadi PDF Summary

Book Description: To provide shelter as a basic need for growing world population (expected to reach 8.6 billion in 2030 and 9.8 billion in 2050), it is necessary to efficiently use natural resources to develop effective building products. This research develops a value-added product from small diameter timber as a promising and innovative building material with greater structural and energy performance than comparable building construction materials. Due to high stiffness/strength-to-weight ratio, sandwich structures are widely used in many areas. Those with hollow cores have attracted interest because the cavities can be used to improve the thermal and acoustic performance. In this study, a novel sandwich structure with 3-D core(s) was developed for constructing building envelopes. Using FE model and a mechanics-based approach, a parametric study was conducted to design a biaxial corrugated geometry to serve as a core for the sandwich structure. After verifying the design, a large mold was fabricated to produce biaxial corrugated panels which were then used to fabricate 1- and 2-layered corrugated core sandwich panels. These panels were evaluated for their bending, axial compression, and thermal conductivity properties. Analytical models using high-order sandwich panel theory for beam configuration and classical plate theory along with third order shear deformation plate theory for full size sandwich panels were developed to capture their bending behavior within the elastic region. Hashin damage model implemented in Abaqus finite element software was used to capture load-carrying capacity of the sandwich panels. Since wood and wood-based products are viscoelastic, creep tests were conducted to understand the time-dependent behavior of the sandwich structure.Experimental results showed significantly higher performance for 2-layered corrugated core sandwich panels than SIPs and stud-walls under bending and axial compression loads. Normalized R-value of the panels filled with closed-cell foam was twice that of typical wood composite panels. Predictions of the bending stiffness and the load carrying capacity of 1-layered corrugated core sandwich panels using analytical and damage models agreed very closely with the experimental results (a difference of less than 1%). Wood strand sandwich panels developed in this study provide an opportunity to prefabricate panels for construction of residential building envelopes.

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