Push-out and pull-out tests are used for destructive evaluation of implant-bone interface strength. Because nondestructive mechanical tests would allow maintenance of an intact interface for subsequent morphological study, we developed such a test to determine the shear modulus of the interface by measuring the shear deformation of a thin layer adjacent to the implant. A polyurethane foam model...

Bond pad cleaning, prior to wire bonding, through the employment of radio-frequency-driven, lowpressure plasmas has been demonstrated to improve the wire bond pull strength.1 The successful application of plasma technology relies on an optimization of process parameters including process pressure, plasma power, time, and process gas type. These key plasma process parameters and their impact on ...

An extensive test program was conducted to develop nail withdrawal design values for wood structural panels. Tested variables included: nail type (plain shank vs. deformed shank), panel type (plywood vs. OSB) and thickness, and exposure condition. Testing followed the procedures described in ASTM D1761. Based on the test results, the recommended allowable nail withdrawal strength for plywood an...

Composite action of any reinforced concrete member is only possible if sufficient bond strength exists between steel reinforcing bars and concrete, which can adequately transfer shear stress between them. Bond strength is a function of compressive strength of concrete and hence high strength concrete has higher bond strength [1-2]. Therefore required development length can be reduced. In order ...

It is popular in Taiwan to use exterior wall tiles decorate and protect buildings. In the tiling process, pullout tests of must be carried out accordance with tensile strength regulations. However, factors such as poor construction, building locations (e.g., different distances from coast coastal area) material quality may affect performance. order ensure safety all projects, this study focuse...

This is the first part of a two-part article describing the effects of The addition of polymers to a cement matrix can add adding poly(vinyl alcohol) (PVA) to a cement based matrix to irasignificantly to the magnitude of the "adhesion" comprove the bond at the fiber-matrix interface. Two types of fibers were ponent of bond at the fiber-matrix interface. For examused, steel and brass fibers (sim...

This study addresses the strength and toughness of generic fibrillar structures. We show that the stress sigmac required to pull a fibril out of adhesive contact with a substrate has the form sigma(c) = sigma(0)Phi(chi). In this equation, sigma(0) is the interfacial strength, Phi(chi) is a dimensionless function satisfying 0 <or= Phi(chi) <or= 1 and chi is a dimensionless parameter that depends...

OBJECTIVE The aim of this study was to assess sensitivity and specificity of surrogate physical ability tests as predictors of criterion firefighting task performance and to identify corresponding minimum muscular strength and endurance standards. METHODS Fifty-one (26 male; 25 female) participants completed three criterion tasks (ladder lift, ladder lower, ladder extension) and three corresp...