Aircraft’s constant operation in tough conditions necessitates the need for structural components of high strength yet low weight. Composite materials are being used as an alternative to conventional aluminum alloys because their competitive strength-to-weight and stiffness-to-weight ratios. In this paper, detailed design procedure a light-aircraft composite material fuselage tooling three dime...

Physical risk factors assessment is usually conducted by analysing postures and forces implemented by the operator during a work-task performance. A basic analysis can rely on questionnaires and video analysis, but more accurate comprehensive analysis generally requires complex expensive instrumentation, which may hamper movement task performance. In recent years, it has become possible to stud...

Purpose. Loosening and fracture of abutment screws are one the most common complications in implant-retained fixed prostheses. Thus, applying proper tightening torque to screw is important for preventing loosening effect ensuring stability implant fixture-abutment connection. Therefore, this study, we aimed investigate on connection a two-piece zirconia system using finite element analysis (FEA...

Design and analysis of propellant grain configurations for determination of the grain geometry which is an important and critical step in the design of solid propellant rocket motors, because accurate calculation of grain geometrical properties plays a vital role in performance prediction. The performance prediction of the solid rocket motor can be achieved easily if the burn back steps of the ...

Purpose – The purpose of this paper is to propose two simple tools for the kinematic characterization of hexapods. The paper also aims to share the experience of converting a popular commercial motion base (Stewart-Gough platform, hexapod) to an industrial robot for use in heavy duty aerospace manufacturing processes. Design/methodology/approach – The complete workspace of a hexapod is a six-di...

Development of new technologies and combined with creativity and innovation, plays the fundamental role in developing of any community′s value. Thus, in this research the design and production of hydroforming device was introduced. One of the best and most efficient technologies in the world of metal forming is wind turbine blade producing with hydroforming method which seems as an innovative m...

When evaluating the fatigue life of a die cast A380 aluminum alloy, the combination of microstructures, inclusions, and stress concentrations is particularly important. This paper presents a failure analysis of an A380 die cast aluminum pivot arm used in a clothing press. This study includes finite element analyses, optical microscopy of the fracture surface, fatigue testing of the A380 aluminu...

Abstract The first step of implanting teeth is to drill a hole in the jaw bone. Excessive temperature produced during drilling is one of the destructive factors for bony tissue. If the temperature generation during surgical drilling exceeds the critical temperature, it could lead to osteonecrosis. This research intends to study drilling parameters such as drilling speed, feed rate, cooling con...

development of new technologies and combined with creativity and innovation, plays the fundamental role in developing of any community′s value. thus, in this research the design and production of hydroforming device was introduced. one of the best and most efficient technologies in the world of metal forming is wind turbine blade producing with hydroforming method which seems as an innovative m...