Torsional Shear Strength and Size Effect in Structural Composite Lumber

Yang, Zhuo

Publication:
Torsional Shear Strength and Size Effect in Structural Composite Lumber

dc.contributor.advisor	Peggi L. Clouston
dc.contributor.advisor	Sanjay R. Arwade
dc.contributor.author	Yang, Zhuo
dc.contributor.department	University of Massachusetts Amherst
dc.contributor.department	Environmental Conservation
dc.date	2023-09-23T07:17:19.000
dc.date.accessioned	2024-04-26T21:20:19Z
dc.date.available	2012-05-21T00:00:00Z
dc.date.issued	2012-01-01
dc.date.submitted	September
dc.description.abstract	The natural variation of strength properties within brittle materials leads to size effect, a well-known phenomenon whereby the mean strength of a material is observed to decrease as the stressed volume increases. An important implication of size effect is that size adjustment parameters must be incorporated into multi-axial constitutive and failure models used in numerical simulations to predict material response to loading. This experimental study seeks to verify and quantify the presence of depth effect under shear failure in the orthotropic principal material directions of parallel strand lumber (PSL) and laminated veneer lumber (LVL). Torsion tests have been performed on specimens of fixed length and differing cross section to get a pure shear failure, by using a Universal Test Machine. The experimental results indicate that there is no depth effect for LVL from torsional shear stresses. PSL testing was limited to one size, and depth effect was not evaluated. A finite element model was built to simulate the torsional test for the 44x140mm LVL specimen. Comparing the experimental test results and the simulation results, the model provided an accurate prediction of the torsional test for Structural Composite Lumber.
dc.description.degree	Master of Science (M.S.)
dc.identifier.doi	https://doi.org/10.7275/2878593
dc.identifier.uri	https://hdl.handle.net/20.500.14394/47905
dc.relation.url	https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=1997&context=theses&unstamped=1
dc.source.status	published
dc.subject	Torsion; Shear; Size Effect; Structural Composite Lumber; Experiment; Universal-type Test Machine; Finite Element Analysis
dc.subject	Structural Materials
dc.title	Torsional Shear Strength and Size Effect in Structural Composite Lumber
dc.type	open
dc.type	article
dc.type	thesis
digcom.contributor.author	isAuthorOfPublication\|email:zhuooyang@gmail.com\|institution:University of Massachusetts Amherst\|Yang, Zhuo
digcom.date.embargo	2012-05-21T00:00:00-07:00
digcom.identifier	theses/964
digcom.identifier.contextkey	2878593
digcom.identifier.submissionpath	theses/964
dspace.entity.type	Publication
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