This paper deals with two-dimensional plane stress wrinkling model of a plastic annular plate. Based on energy method and the nonlinearity of strain-displacement law, a bifurcation function in polar coordinates is derived analytically. This technique leads to the critical conditions for the onset of the plastic wrinkling of flange during the deep drawing process. To find this solution, the Tres...

An adaptive fuzzy sliding mode controller (AFSMC) is adopted to reduce the 2D flow-induced vibration of an elastically supported square-section cylinder, free to oscillate in stream-wise andtransverse directions in both lock-in and galloping regions. The AFSMC strategy consists of a fuzzy logic inference system intended to follow a sliding-mode controller (SMC), and a robust control syste...

The teamwork research defines several important concepts regarding the design of agents so that they are in fact able to play as members of a collaborative group. Currently such research has been focused on multiagent domains, where agents have full autonomy to take decisions. However this model is not common in real applications where humans may wish to be in control for critical decisions. Th...

A method of analysis for determining crack propagation loads on wood beams with end splits is presented. The method is based on (1) linear elastic orthotropic fracture mechanics concepts, (2) theory of complex variables, and (3) least squares boundary value collocation (BVC). Using this method, the critical stress intensity factor, Kllc of Douglas-fir beams with end splits is determined to be 2...

In the present paper, notch critical plane method proposed by authors is extended from 2D- to 3D-cases. The passing through assumed point and experiencing maximum variance of resolved shear stress defined as plane. linear-elastic fields around root are fitted via polynomial functions. relationship between distance, l, fatigue damage, Db, under variable amplitude loading blocks proposed. Susmel’...

Out of plane vibrations are suppressed in graphene layers placed on a substrate. These vibrations, in suspended samples, are relevant for the understanding of properties such as the electrical resistivity, the thermal expansion coefficient, and others. We use a general framework to study the properties of the out of plane mode in graphene on different substrates, taking into account the dynamic...

evidence-based medicine is becoming an important s of human life span, which crucial developmental processes occur. since peers play a critical role in the psychosocial development of most adolescents, peer education is currently considered as a health promotion strategy in adolescents. peer education is defined as a system of delivering knowledge that improves social learning and provides psyc...

introduction: journal clubs play an important role in teaching evidence based medicine (ebm). evidence based journal clubs focus on real problems of the group, and set a minimum level of evidence for articles to be presented, and in the end a clinical bottom line is set to be used in the daily clinical practice. in this article, we have explained our experience in running evidence based journal...