In this paper, the active buckling control of smart functionally graded (FG) plates using piezoelectric sensor/actuator patches is studied. A simply supported FG rectangular plate which is bonded with piezoelectric rectangular patches on the top and/or the bottom surface(s) as actuators/sensors is considered. When a constant electric charge is imposed, the governing differential equations of mo...

Like other structures, shallow domes have imperfections from the prescribed values obtained by specifications during the construction process. Specifications define some tolerance values for imperfections. Despite consideration of these values, the critical load of a dome varies for each imperfection pattern. So the reliability plays an important role in domes safety. Theoretical evaluation pro...

Predicting and mitigating unwanted vibration of drillstrings is an important subject for oil drilling companies. Uncontrolled vibrations cause premature failure of the drillstring and associated components. The drillstring is a long slender structure that vibrates in three primary coupled modes: torsional, axial and transverse. Among these coupled modes, the transverse mode is the major cause o...

Relevance to Musculoskeletal Condition: Segmental bone loss often requires multiple surgical interventions in order to achieve fracture healing. This study addresses the healing effects of recombinant porcine growth hormone (r-pGH) in a standardized gap model in the tibia in micropigs. Introduction: Treatment of segmental bone loss in long bones is one of the most challenging problems in orthop...

This paper presents a modified analytical formula for estimating the static top-to-bottom compressive strength of corrugated board packaging with different perforations. The framework is based here on Heimerl’s assumption an extension from single panel to full box, enhanced numerically calculated critical load. In proposed method, torsional and shear stiffness cardboard, as well depth-to-width ...

Most of the building damages in our country are caused by earthquakes. As known, properties determinant magnitude earthquake forces that cause these damages. Thus, selection structural system is crucial design process. In case any irregularity building, load transfer will not be provided safely. Turkish Earthquake Code, related irregularities analysed under two groups. Group A indicates plan, a...

Torsional vibrations are inherently present in every rotating powertrain. In resonant conditions, torsional can be significantly amplified. A typical method to reduce the vibration particularly at resonance is modify natural frequencies with component design. Commonly, a straightforward for modification adjustment of stiffness coupling. This study presents using coupling design continuously adj...

In this paper, a model of torque dependence of critical current in a Bi2223/Ag composite concentric cylinder is analyzed. Based on the hypothesis of planar section and elastic linear strengthening constitutive theory, the relation between torque and shear strain is firstly obtained. Then a linear weakening relation between critical current density and shear strain are put forward. Finally the e...