Results 211 to 220 of about 17,173 (240)

PREDICTION OF WITHDRAWAL STIFFNESS OF SELF-TAPPING SCREWS

World Conference on Timber Engineering (WCTE 2023), 2023
: Self-tapping screw is a new generation of fasteners which is often inserted into the face of timber membersat an angle to develop stiff and strong connections. The withdrawal stiffness of self-tapping screws is an important property that influences the performance of the connection.
Mirdad, A.H., Niederwestberg, J., Jucutan, A., Chui, Y.H.   +3 more
openaire   +2 more sources

AO/ASIF self-tapping screws (STS)

Injury, 1993
The term self-tapping screw refers to screws which are inserted into a predrilled hole directly without first tapping a thread. A self-drilling screw would refer to a screw inserted without predrilling which would function similar to a threaded K-wire. Selftapping screws are further subdivided into threadfarming and thread-cutting screws.
F W, Baumgart, J, Cordey, K, Morikawa, S M, Perren, B A, Rahn, R, Schavan, S, Snyder   +6 more
openaire   +2 more sources

Pullout Performance of Self-Tapping Medical Screws

Journal of Biomechanical Engineering, 2011
This study investigates the effect of the pilot hole size, implant depth, synthetic bone density, and screw size on the pullout strength of the self-tapping screw using analytical, finite element, and experimental methodologies. Stress distribution and failure propagation mode around the implant thread zone are also investigated.
Zhijun, Wu, Sayed A, Nassar, Xianjie, Yang   +2 more
openaire   +2 more sources

Self-Drilling and Self-Tapping Screws

Journal of Craniofacial Surgery, 2010
The aim of the current study was to compare self-drilling and self-tapping screws with regard to bone contact and the production of bone debris using scanning electron microscopy.Three New Zealand rabbit calvariae were used. Self-tapping and self-drilling screws were inserted into the outer surface of the skull with and without saline solution ...
Juliana Gonçalves, Goelzer, Rafael Linard, Avelar, Rogério Belle, de Oliveira, Roberto, Hubler, Roger Lanes, Silveira, Rosilene Andrea, Machado   +5 more
openaire   +2 more sources

Group effects in axially loaded self-tapping screw connections

Engineering Structures, 2022
Abstract Connections using self-tapping screws are frequently used in modern timber construction, with screws often assembled in groups to resist large loads. Load carrying capacity and stiffness are maximized when screws are loaded parallel to the screw axis in withdrawal.
Tom Joyce, Ying Hei Chui
openaire   +1 more source

SELF TAPPING SCREW

1999
The invention pertains to a screw produced by cold rolling, designed to be screwed into plastic material, and having a self tapping thread, the fillets (3) of which are formed, in a sectional view, like a knife blade. The fillet flank surface (6, 8) features an inward curve (5) in its central third and forms an outer thread flank angle ( alpha ) of ...
EJOT VERBINDUNGSTECH GMBH & CO, GROSSBERNDT HERMANN, KOENIG GOTTFRIED   +2 more
openaire   +2 more sources

[Research on Self-tapping Performance Test of Self-tapping Bone Screws].

Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation, 2022
To study the self-tapping performance test method of self-tapping bone screws based on the YY/T 1505 standard.With reference to the method of YY/T 1505, various factors affecting the self-tapping force test was optimised, and the self-tapping force judgment method was improved.The experimental results showed that the self-tapping force obtained by the ...
openaire   +1 more source

Pullout Strength of Self-Tapping Screws Inserted to Different Depths

Journal of Orthopaedic Trauma, 2005
The purpose of this study was to determine whether the depth of insertion through the far cortex of self-tapping screws significantly affects pullout strength.Fifty, Synthes, 3.5-mm, self-tapping screws were inserted into synthetic bone blocks and divided into 5 groups. Group 1 had screws with their tips inserted 1 mm short of the far cortex.
Robert, Berkowitz, Glen, Njus, Gregory, Vrabec   +2 more
openaire   +2 more sources

In vitro Evaluation of the Loosening Characteristics of Self-Tapped and Non-Self-Tapped Cortical Bone Screws

Clinical Orthopaedics and Related Research, 1981
The heads of self-tapping and non-self-tapping screws in dog femurs were exposed to a cyclic shearing force of 110 N for 200 loading cycles. This cyclic shear loading created a decrease in pull-out strength for both screw types of approximately 11% (p less than 0.01).
C T, Vangsness, D R, Carter, V H, Frankel   +2 more
openaire   +2 more sources

Self-Tapping Screw Performance in Aluminum-Steel Joints

Volume 2: Advanced Manufacturing, 2016
Over the last few decades, lightweight material joints including plastics, aluminum, magnesium and various composites have been widely used in many mechanical and structural applications such as automotive, aircraft and so on, for their high strength-to-weight ratio and the significant improvement for the fuel economy and energy efficiency.
Zhijun Wu, Sayed A. Nassar, Kshitij Satav, Shraddha Jagatap   +3 more
openaire   +1 more source