Graduate Thesis Or Dissertation
 

Assessing biaxial strength characteristics of wood-based structural panels

Public Deposited

Downloadable Content

Download PDF
Request Accessible Version
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/fn107104c

Descriptions

Attribute NameValues
Creator
Abstract
  • Biaxial strength characteristics of wood-based structural panels were evaluated by using analytical and experimental methods. Cruciform plywood specimens were tested under biaxial tensile-tensile, compressive-compressive loadings in a symmetrically-jointed- arm test fixture, which was mounted on a universal testing machine. Performance of the test fixture was also evaluated during the tests. Electrical resistance strain gauges were used to measure strain values at a point of interest, and brittle coatings were also used to analyze strain distributions over the test section. Finite-element analysis was employed to develop an analytical tool. The basic configurations, detail alternatives, and the influence of reinforcement orientation on the uniformity of the biaxial stress/strain distributions in the test section of the cruciform specimen were examined by using the finite-element method. The experimental strain values and those from finite-element analysis were found in close agreement. The Tsai-Wu Tensor Polynomial Strength Theory was used to construct a predicted biaxial strength envelope in stress space. Comparisons were made between the experimental data and the theoretical predictions in quadrants I and III of stress space, as well as between the finite-element results and the theoretical predictions in quadrants II and IV of stress space. Good agreements were found in quadrants I, II and IV at a load value that corresponded with audible cracking. In quadrant III of stress space, compressive-compressive stress space, the experimental failure stress condition did not agree with the analytical solution for the strength theory envelope in that quadrant. With respect to testing method, the jointed-arm test fixture worked well in tension-tension tests. However, a method of special lateral support was needed for the compression-compression biaxial condition. Results also indicated that reinforcement orientation in the arms may influence ultimate load capacity and failure mode of the biaxial specimen.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Publisher
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome, 24-bit Color) using ScandAll PRO 1.8.1 on a Fi-6670 in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Accessibility Feature

Relationships

Parents:

This work has no parents.

In Collection:

Items

Thumbnail Title Date Uploaded Visibility Actions
file details ChengPing1997.pdf 2017-08-01 Public Download