AIM To assess the survival rate of root filled cracked teeth over a 2-year period in a tertiary institute. METHODOLOGY Forty-nine patients who had root canal treatment completed on their cracked teeth at the National Dental Centre (Singapore) were recalled for a 2-year review. Collected review data included presence of periodontal pocketing, sinus tract and swelling associated with the teeth....

This article presents a new analysis of the vibration characteristics open-edge cracks for graded moving beams under thermal load. The material property gradient is based on distribution power law in direction beam thickness. equation obtained depending precept Hamilton and resolved by extension Galerkin’s approach. A rotational spring used to represent cracking beam. effects axial velocity, in...

Damage detection in structures and systems is essential for monitoring parameters that can affect their integrity. This paper evaluates the efficiency of four damage indices (DIs) commonly used with temporal wave signals. The root mean square deviation, absolute percentage covariance, correlation coefficient deviation DIs are presented, a normalization then proposed. An Euler-Bernoulli beam as ...

The cracks alter the physical and modal properties of beam, i.e., stiffness, damping, natural frequency, mode shapes, and, in turn, dynamic response beam changes to a considerable extent. condition monitoring beams is essential avoid its catastrophic failure applications. A basic criterion has been followed for parameters like frequencies, stiffness possible crack detection. In contrast, dampin...

This paper provides an exact approach for free transverse vibration analysis of a simply supported non-uniform Euler-Bernoulli beam with an arbitrary number of concentrated cracks. The equation of motion is normalized and written based on a set of dimensionless parameters. The general solution is obtained based on the Bessel functions. The differential equation is modified to include cracks. Th...

In most structural failures, deterioration of reinforced concrete structure is due to corrosion reinforcing bars. Ingress chloride ions and reaction carbon dioxide with the cement paste poor-quality or inadequate cover are main causes corrosion. Corrosion can be reduced by using high-quality providing proper reinforcement. addition, inhibitors used protect reinforcement in order extend service ...

This paper aims to numerically investigate the structural behavior of reinforced high-strength concrete (HSC) beams retrofitted by Carbon Fiber Reinforced Polymer (CFRP) sheets after cracking. Six pre-cracked HSC with CFRP having identical reinforcement are tested four-point loading until failure using Abaqus software, besides two others without as control beams. attached on three beam sides in...

In order to check and eliminate the cracked eggs quickly and exactly in the process of egg products, a nondestructive testing system for eggshells based on digital signal processor (DSP) was established. The system utilized a TMS320VC33 DSP as a hardware platform, and has many functions such as controlling knock-equipment, sampling and processing the acoustics signals, judging the cracked-shell...