Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 13 of 13 for “"Parallel-to-Grain"”.
-
Parallel-to-Grain Withdrawal Resistance of Structural Self-Tapping Screws in Canadian Timber
… capacity of self-tapping screws (STS) inserted parallel-to-grain. An experimental study was conducted with 100 screws tested in total. The experimental program includes two main test series. First, withdrawal testing was conducted on screws with a diameter of 10 mm with varying embedment depths, …
-
The effect of length on tensile strength parallel-to-grain in structural lumber
… of 30, 90 and 120 inches were tested in tension parallel-to-grain. Results obtained from the tests indicated that the tensile strengths of the 30-inch test specimens were significantly higher than the tensile strengths of the 90- and 120-inch test specimens. A tensile strength-length effect model …
-
Effect of Minimum Suppression and Maximum Release Years on Compression Parallel to Grain Strength and Specific Gravity for Small-sized Yellow-poplar (Liriodendron tulipifera L.) Specimens
… properties of wood are also closely related to specific gravity, it would thus be of interest to learn how minimum suppression and maximum release years' evidence that can be extracted from radial growth patterns based on a modified radial growth averaging (RGA) technique's influence the …
-
Quantitative anatomical characteristics of plantation grown loblolly pine (Pinus taeda L.) and cottonwood (Populus deltoides Bart. ex Marsh) and their relationships to mechanical properties
The anatomical properties of loblolly pine (Pinus taeda L.) and cottonwood (Populus deltoides Barto ex. Marsh.), both from intensively managed woodlands, were quantitatively characterized using the principles of stereology. Physical and mechanical properties were also determined for each growth …
-
Relationships of growth rate and mechanical properties in sweetgum, Liquidambar styraciflua
… Each tree was sampled for compression strength parallel to grain along the height of the merchantable stem. Oven-dry specific gravity was then calculated for each sample. The results indicate that young sweetgum trees grow weaker wood than mature trees. It was observed that dominant trees were …
-
Experimental Investigation of Group Action Factor for Bolted Wood Connections
This thesis presents the results of testing to determine the significance of the group action factor at the 5% offset yield and capacity of single-shear bolted wood connections loaded parallel to grain. The single and multiple-bolt connections tested represent common connection geometries used in …
-
Two novel techniques to study multiple bolted wood connection behavior
… bolts output an electronic signal proportional to the shear forces transmitted through the bolt in a double-shear connection during loading. The digital image correlation method combines digital image analysis and image correlation to calculate surface displacements from a set of digitized video …
-
Effect of Cracking on Lag Bolt Performance
This dissertation presents the results of testing to determine the load-slip characteristics of single-shear single lag screw connections subjected to monotonic lateral loading parallel to grain. Of particular importance was the comparison of experimental capacity and 5% offset yield load …
-
Structure and Properties Relationships of Densified Wood
The objective of this research was to investigate the effect of applied compressive strain in various environments, on the strength and stiffness of compressed wood samples. It is believed that transverse compression of wood at specific conditions of temperature and moisture will result in improved …
-
Performance of laminated veneer wood plates in decking systems
… this thesis represents the first known attempt to 1) develop a theoretical framework for evaluating the performance of laminate veneer panels in prototype dry freight van trailer decking systems, 2) develop a testing facility to generate an experimental database on these product through full …
-
Development of A Ready-To-Assemble Construction System
To accommodate an expanding global population, a renewable raw material resource base, in conjunction with new building technologies, must be applied to the residential housing sector. Desirable characteristics of housing systems are economy, safety, environmental sustainability, durability, design …
-
Long-term creep modeling of wood using time temperature superposition principle
… kiln-dried southern pine loaded in compression parallel-to-grain and exposed to constant environmental conditions (~70°F, ~9%EMC). Short-term accelerated creep (17 hour) and recovery (35 hour) data were collected for each specimen at a range of temperature (70°F-150°F) and constant moisture …
-
Permanent Bracing Design for MPC Wood Roof Truss Webs and Chords
The objectives of this research were to determine the required net lateral restraining force to brace j-webs or j-chords braced by one or more continuous lateral braces (CLB's), and to develop a methodology for permanent bracing design using a combination of lateral and diagonal braces. SAP2000 …