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 98 for “"Screws"”.
-
Standoff Screws Used In Composite Joists
… shear connector in composite joists. Standoff screws are being investigated as an alternative to welded shear studs in short span composite joists. The data and results obtained from 106 pushout tests performed on the Elco Grade 8 standoff screw are presented. The test parameters include: …
-
Destructive disassembly of bolts and screws using impact
Disassembly, the process of separating parts or components at the end of their useful life is complex due to a variety of fastener shapes and variability in their damage during use. As a natural solution, mechanical impact has been suggested as a cost-effective method for destructive disassembly of …
-
Experiments of the strength of bolts and screws
Made available in DSpace on 2017-11-30T22:46:06Z (GMT). No. of bitstreams: 2 5971943.pdf: 8852576 bytes, checksum: e38d7011ba3bf6eb7cefbb8c2f09e794 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1910
-
Strength Calculation Model for Standoff Screws in Composite Joists
… tests utilizing the ELCO Grade 8 standoff screws. The goal is to develop a strength prediction equation and determine reliability parameters compatible with the Load Factor Resistance Design (LRFD) procedure that would allow the use of this shear connector in design of composite floor …
-
Further Investigation of Standoff Screws Used in Composite Joists
… shear connector in composite joists. Standoff screws are being investigated as viable an alternative to welded shear studs in short span composite joists. The data and results obtained from 59 pushout tests performed on the 5/16 in. diameter Elco Grade 8 standoff screw are presented. The test …
-
Standoff screws functioning as mechanical shear connectors in composite joists
The results of sixty-five double-sided pushout tests utilizing the Elco grade 8, 5/16 in. diameter, standoff screw functioning as a mechanical shear connector are presented. In all tests, the base material, through which the screw was fastened, was fabricated out of back to back angle to simulate …
-
Parallel-to-Grain Withdrawal Resistance of Structural Self-Tapping Screws in Canadian Timber
… the withdrawal 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 …
-
Predicting the Joint Stiffness of Wooden Pallets Assembled with Lag Screws and Carriage Bolts
… associated with pallets joints made with lag screws and carriage bolts. It is important to understand that different materials, fastening methods, and design considerations can have a huge impact on the stiffness of the joint. This paper will discuss the various tests that were used to measure …
-
Effect of Fixation Using Locked Compression Plate versus Lag Screws on Biomechanics of Talonavicular Joint: A Human Cadaveric Foot Model
… a locked compression plate plus one screw or two screws. Six specimens (plate screw group) received the plate plus a lag screw, where the screw was inserted in a retrograde manner. Seven specimens (two screw group) received two lag screws, both inserted in retrograde manner. Three dimensional …
-
Restwachstum und Komplikationen nach Schraubenfixierung der Epiphyseolysis capitis femoris
… (SCFE) can be fixed in-situ with K-wires or screws. For the latter is said that one disadvantage is the lack of femoral neck growth. Assumed reasons for this is despite an injury of the physis by the often too long thread the missing lubrication of the screw in the bone. The following study …
-
Design and Development of a Novel Expanding Pedicle Screw for Use in the Osteoporotic Lumbar Spine
Pedicle screws are commonly utilized in spinal surgery; however, traditional designs often do not provide adequate fixation in osteoporotic spines. The objective of this thesis was to develop a novel expanding screw for use in osteoporotic lumbar pedicles. Helical screws capable of expanding post …
-
Ανάλυση 50 σπονδυλοδεσιών: Ιδιαιτερότητες του υλικού μας: Τεχνικές τροποποιήσεις
… stabilization of the cervical spine, plate-screws-graft was used six times; graft once, screws - graft twice, and screws-graft was used five times. In the dorsal and lumbar spine, in the anterior fusions, plate-screws-graft was used four times and graft twice while in the posterior …
-
Optimization of Pedicle Screw Depth in the Lumbar Spine: Biomechanical Characterization of Screw Stability and Pullout Strength
… to three experimental groups. Accordingly, screws were inserted to mid-body, pericortical and bicortical depths and underwent cyclic loading and pullout using a custom MTS Bionix servohydraulic testing system. Insertion depth was confirmed by fluoroscopy. Screw insertion depth was randomized …
-
Screw fixation of implants to the spine
Bone screws are used to fix various implants to the human spine. Screw fixation can be difficult in osteoporotic bone because of its reduced strength. This research aimed to investigate screw fixation techniques in the spine. A questionnaire study, representing British and Irish spine surgeons, …
-
The Use of Resorabable Plates for the Fixation of Mandubular Fractures
… poly-L-lactide(SR-PLLA) plates and screws. Metallic bone plates and screws have been commonly used in oral and maxillofacial surgery for internal fixation. However, there are several disadvantages such as atrophy of cortical bone inherent to excessive rigid fixation systems, growth …
-
Knöcherne Integration und Biokompatibilität eines neuen resorbierbaren Polymers zur Schraubenaugmentation im osteoporotischen Knochen
… The control group received no treatment. Two screws were implanted in the cancellous bone in the distal femur and proximal tibia in both groups. The screws were fixed in the bones with variations of the new bone cement. In each group, three screw fixation techniques were investigated: …
-
Adhäsivsystem aus amphiphilem Knochenhaftvermittler und dualhärtendem Zement als Alternative zur geschraubten Fixation von Osteosyntheseplatten im Mittelgesichtsbereich
… with osteosynthesis plates and corresponding screws until bone healing is complete. This often causes new fractures to fragile bones while drilling pilot holes or trying to insert screws. The punctually adhesive fixation of osteosynthesis plates using a common cement based on …
-
Development of image-based surgical planning software for bone-conduction implants
… which guarantee sufficient bone for the implant screws to grasp. Temporal bone computed tomography (CT) images were segmented and processed and custom Matlab code was written to generate and test thickness colormaps. For validation, measurements performed by a trained otologist were compared to …
-
Parametrization of Triple Screw Pumps for Aerospace Applications
… upper stages. To this end, the geometry of the screws is first determined from the relative sizes of the screws and tooth height. From this — along with the screw angle and screw clearance — the performance parameters of flow rate, output pressure, and efficiency can be computed. These results …
-
Examination of the Lateral Resistance of Cross-Laminated Timber in Panel-Panel Connections
… connections, including nails, bolts and lag screws. The behavior of CLT full-scale wall panels is dependent upon the individual connection properties including the panel-panel connections between adjoining CLT panels within the wall. The purpose of this research is to evaluate the behavior of …
Page 1 of 5