Material forces in microfractured bodiesArchive of Applied Mechanics - Tập 77 - Trang 75-84 - 2006
E. K. Agiasofitou, C. Dascalu
In the present work, we study the overall behavior of a microfractured elastic
body within the configurational mechanics framework. Micro and macro scales are
considered and scale changes are carried out by asymptotic developments
homogenization. The homogenized equations of material momentum and scalar moment
of material momentum are obtained. In these equations the microcrack length
appears as a... hiện toàn bộ
A novel beam finite element with singularities for the dynamic analysis of discontinuous framesArchive of Applied Mechanics - Tập 83 - Trang 1451-1468 - 2013
S. Caddemi, I. Caliò, F. Cannizzaro, D. Rapicavoli
In this work, a model of the stepped Timoshenko beam in presence of deflection
and rotation discontinuities along the span is presented. The proposed model
relies on the adoption of Heaviside’s and Dirac’s delta distributions to model
abrupt and concentrated, both flexural and shear, stiffness discontinuities of
the beam that lead to exact closed-form solutions of the elastic response in
presence ... hiện toàn bộ
Buckling and free vibration of a side-cracked Mindlin plate under axial in-plane loadArchive of Applied Mechanics - Tập 90 - Trang 1811-1827 - 2020
Jian Xue, Yuefang Wang, Lihua Chen
In this paper, the buckling and free vibration of a Mindlin plate with a side
crack are presented considering a uniaxial in-plane compressive or tensile load.
The side crack is through the thickness of the plate. In the Ritz method, a
series of corner functions are incorporated into the admissible functions which
consist of the modified characteristic functions. With this treatment, one can
descri... hiện toàn bộ
Untersuchung von einfach gestalteten Krümmern mit Rechteckquerschnitt bei unstetigen QuerschnittsänderungenArchive of Applied Mechanics - - 1988
M. Knoch, C. Kramer
Für den Bereich des strömungstechnischen Anlagenbaus wird eine konstruktiv
einfache und kostengünstig herzustellende Alternative zu den beispielsweise aus
der Lüftungs- und Klimatechnik bekannten 90°-Krümmern mit Rechteckquerschnitt
und gerundeten Umlenkkonturen aufgezeigt. Mit Hilfe von Druckverlustmessungen
und durch Beobachtung der vereinfachten zweidimensionalen Krümmerdurchströmung
wird nachg... hiện toàn bộ
Mode shape degeneration in linear rotor dynamics for turbocharger systemsArchive of Applied Mechanics - Tập 87 - Trang 575-592 - 2016
Panagiotis Koutsovasilis
The modelling and simulation process of high-speed rotor dynamics is a rather
essential task that should accompany the virtual prototype development of
exhaust gas turbochargers. The system’s nonlinear nature originates primarily in
the oil-film concentrated in the journal bearings, which relates to the
associated gyroscopic forward and backward modes. This study focuses on linear
rotor dynamics a... hiện toàn bộ
Biegetheorie der allgemeinen Rotationsschalen mit schwacher Veränderlichkeit der SchalenkrümmungenArchive of Applied Mechanics - Tập 33 - Trang 279-300 - 1964
H. Duddeck
Es wird eine Biegetheorie erster Näherung für die abklingenden Randstörungen von
Rotationsschalen gegeben, deren Ränder mit Breitenkreisen zusammenfallen. Die
erzeugende Meridiankurve kann bis auf geringe Einschränkungen beliebig sein. Es
werden nur solche extremen Krümmungsänderungen ausgeschlossen, die bei üblichen
bautechnischen Schalen praktisch nicht vorkommen. Die formale Behandlung der
gege... hiện toàn bộ
Lyapunov exponents and a strange attractor for the damped nonlinear mathieu equationArchive of Applied Mechanics - Tập 61 - Trang 49-56 - 1991
S. D. Kisliakov, A. A. Popov
A single-degree-of-freedom nonlinear parametrically excited oscillator is
considered. Such oscillators provide models for mechanical systems such as
shells and plates under periodical load. Chaotic motions and a strange attractor
are found to exist applying the theory of Lyapunov exponents. Some difficulties
in practical application of the computational procedure for Lyapunov exponents
are discuss... hiện toàn bộ
Dynamic interaction between a moving vehicle and an infinite structure excited by irregularities – Fourier transforms solutionArchive of Applied Mechanics - Tập 72 Số 2 - Trang 199-211 - 2002
Bitzenbauer, J., Dinkel, J.
A new approach to calculate the dynamic interaction between a moving vehicle and
an infinite structure is presented. Its main characteristics are: use of Fourier
transformed domains (leading to a very general formulation of the problem),
correct consideration of the motion of all components of the model;
consideration of all kinds of mutual dynamic interactions between the vehicle
and the track, a... hiện toàn bộ