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 20 of 90 for “"Strength Testing"”.
-
Use of a Synthetic Substrate for Orthodontic Bond Strength Testing
In vitro bond strength studies are of great importance and interest since they allow the prediction of clinical success of orthodontic adhesives. There are many studies that have investigated bond strength values of bonding systems. However, due to the variation in the materials and methods …
-
Laboratory Strength Testing of Argillaceous Limestone Under Varying Saturation, Scale, Loading Rate, and Confinement Conditions
… This research examines the influences of various testing conditions on the geomechanical properties of Cobourg limestone, to address the changing in situ conditions that may be present during long-term storage of nuclear waste. The effects of specimen saturation, scale, loading rate, and …
-
An experimental/analytical investigation of combined shear/end loaded compression strength testing of unidirectional composites
… the method as a reasonable alternative to IITRI testing. Combined shear/end loading was accomplished by applying a controlled amount of clamping force to the stabilizing blocks, allowing them to transmit shear force to the coupon faces through friction. The fabrication of test specimens from a …
-
A Comparative Study on Shear Strength Testing of Single and Multi-layer Interfaces using Large Direct Shear Apparatus
… To date, many laboratories use single interface testing instead of multi-layer interface testing to determine geosynthetic shear design characteristic values that are used in the design of structures such as landfill liners. A topic of discussion remains the preferred interface testing …
-
Pavement thickness design using reclaimed hydrated Iowa class C fly ash as a base material
… fly ash to standard earth materials. Extensive strength testing was conducted using California Bearing Ratio and unconfined compressive strength tests. Results of strength testing were correlated to structural layer coefficient for use in a flexible pavement design method. A general test and …
-
Effects of throwing on rotator cuff strength and proprioception
This study was performed to examine declines in strength and proprioception after a single bout of overhand baseball throwing. Twenty-three university students volunteered for this study and were placed into three groups. Subjects completed a pretest consisting of joint position sense testing …
-
Verifying the Calcium Oxychloride Threshold in Cementitious Pastes
… however, this limit was developed using flexural strength testing. For this investigation, the current threshold was evaluated using compressive strength and mass change over time in paste specimens exposed to CaCl2. Fly ash is used to replace cement (up to a 50% mass replacement) in order to …
-
Bilateral deficit: A comparison between upper-body and lower-body maximal strength
… purpose was to determine if maximal unilateral strength is greater than maximal bilateral strength for the leg press and vertical dumbbell press exercises. The secondary purpose was to determine if blood glucose levels differ between the unilateral and bilateral conditions for the leg press …
-
The Effect of Steroid Dose Regimen on the Relationship Between Lower Extremity Muscle Function and Cardiac Function in Post Heart Transplant Patients
… Prednisone dosage was monitored, and isokinetic strength testing was performed at 4 different time periods throughout the first year post-transplantation. Cardiovascular/aerobic measurements were obtained at the fourth time period. Pre-surgery characteristics were obtained from the patient's …
-
Fatigue testing of partial-depth precast concrete bridge deck panels with embedded wire trusses
… requirements given in AASHTO LRFD. The ultimate strength testing showed that the cycled specimens still reached theoretical ultimate strengths when cycled to stress magnitudes that were below the infinite fatigue life category.
-
Force Platforms for Isometric Hamstring Testing: Reliability, Validity and Practical Applications in Professional Soccer
… time for recovery. Measurements of hamstring strength may allow recovery status to be assessed based on running loads. Isokinetic dynamometry (IKD) is the gold standard hamstring strength test (Toonstra & Mattacola, 2013). However, its cost, lack of portability and time taken to test deem it …
-
An Optimal Interset Rest Period For Strength Recovery During A Common Isokinetic Test
<p>Introduction: Isokinetic testing is used in rehabilitation settings on a regular basis, yet there is a lack of consistency in rest period usage among protocols. Purpose: The purpose of this study was to establish an optimal rest period that would allow reproducibility of strength during a common …
-
Investigation of strength of a hybrid adhesive anchor system used in precast concrete welded repair applications subjected to tensile and eccentric shear loading
… erection plate to the repair plate. Limited testing and theoretical data are currently available to provide design guidelines on how the elevated temperatures induced by welding affect the behavior and capacity of the adhesive anchoring systems. This dissertation outlines bond tests, …
-
STATIC STRENGTH OF DOUBLE-SKIN GROUTED X-JOINT INFILLED WITH HIGH STRENGTH GROUT
In recent years, with the reassessment, strengthening and repair of existing old offshore structures forming an important part of offshore engineering, much attention has been given to the methods for strengthening of tubular joints. Although strengthening by grouting has been considered to be …
-
Effect of moisture and temperature on the mechanical properties of concrete
… materials. Extensive research was accomplished testing concrete properties including but not limited to modulus of elasticity, compressive strength, tensile strength, and Poisson's ratio using modulus of elasticity and strength testing. The research was done under laboratory conditions. The …
-
Acute effects of self-myofascial release and static stretching on shoulder range of motion and performance in overhead athletes with glenohumeral internal rotation deficit
… (i.e. glenohumeral external rotation isometric strength, motor unit recruitment, and throwing velocity) in male softball players with glenohumeral internal rotation deficit (GIRD).</p> <p>Methods: The sample consisted of 12 male amateur softball players (age: 36.92 ±11.17 years; height: 177.42 …
-
Effect of Delayed Polymerization Time and Bracket Manipulation on Orthodontic Bracket Bonding
… times on orthodontic bracket shear bond strength and degree of resin composite conversion. Orthodontics brackets were bonded to extracted third molars in a simulated oral environment after a set period of delayed polymerization time and bracket manipulation. After curing the bracket …
-
The Comparison of the Tensile, Shear-Peel, and Torque Orthodontic Bond Strength Test Methods Performed on a Resin and Two Glass Ionomer Cements
… compare the tensile, shear-peel, and torque bond strength testing methods using a commercially available resin (R), light-cured (LC), and chemically cured (CC) glass ionomer. Sixty-three bovine incisors were randomly divided into three groups. Stainless steel incisor brackets were bonded to the …
-
Effect Of Surfaces On Strength Evolution Of Silicon Nanostructures
… have shown a link between oxidation and strength changes in single crystal silicon nanostructures but provided no clues as to the mechanisms leading to this relationship. Through a mix of atomic force microscope based fracture strength experiments, molecular dynamics modeling, and …
-
Unprocessed rice husk ash as a partial replacement of cement for low-cost concrete
… in concrete without sacrificing the compressive strength. This study investigates the use of Cambodian rice husk ash in 10, 20 and 30% replacements of Portland cement by mass in mortar, without optimization of the ash by controlled burning. Five ashes collected from different sources in Cambodia …
Page 1 of 5