In this paper mixed finite element methods of higher-order for time-dependent contact problems are discussed. The mixed methods are based on resolving the contact conditions by the introduction of Lagrange multipliers. Dynamic Signorini problems with and without friction are considered involving thermomechanical and rolling contact. Rothe’s method is used to provide a suitable time and space di...

The purpose of this paper is to review and further develop the subject of variational integration algorithms as it applies to mechanical systems of engineering interest. In particular, the conservation properties of both synchronous and asynchronous variational integrators (AVIs) are discussed in detail. We present selected numerical examples which demonstrate the excellent accuracy, conservati...

Bu çalışmada, tek açıklıklı köprülerin hareketli asılı kütle etkisindeki dinamik davranışı incelenmiştir. Ele alınan probleme ait hareket denklemi değişken katsayılı kısmi türevli diferansiyel denklem şeklinde elde edilmiş ve Newmark yöntemi ile sayısal olarak çözülmüştür. Dinamik analizlerde hız parametresi, oranı, frekans oranı köprünün sönüm oranının taşıtın üzerindeki etkileri araştırılmışt...

We consider the problem of integration of the initial value problem of the rotational rigid body dynamics. We are motivated by a very practical problem: time integration of the equations of motion of drill bits as they cut through rock. The drill bit geometry is fully three-dimensional, as is the surface of the rock to be cut, and the force laws of cutting, scraping, impacts, and persistent con...

This paper establishes an axisymmetric model for a levitation device. Therein, the Maxwell equations are combined with balance of linear momentum. Different possible formulations to describe MAXWELL presented and compared discussed in example. A high order finite element discretization using GALERKIN's method space generalized NEWMARK‐α time developed electro‐magneto‐mechanical approach. Severa...

Undoubtedly W. S. Rendra's poem “Nyanyian Dunia” can be brought closer to semantics, worldviews, and humanities values. However, the three things above become a contrast when faced with research that focuses on eroticism Newmark's method of translation. Mainly “Di Antara Kita” by Ajip Rosidi, which has not yet been analyzed. This study aims explain how erotic texts are presented create aestheti...

Hunting is a potentially dangerous phenomenon related to the lateral oscillation of wheels that impacts rails and causes wear infrastructure’s components. Therefore, analysis timely detection hunting can lead application corrective maintenance tasks, reducing damages, costs even derailments as result. In this work, vibration response finite element model rail with hunting-induced loads by singl...

In flexible manipulators, it is important the reduce end-effector vibrations. Suppression of vibrations significantly increases precision performed work. Selection velocity profile for giving motion to a manipulator crucial especially during high-speed motions. this study, effect 3rd order S-curve time parameters which related with natural period on endpoint beam are investigated. The results a...