in this paper, dynamic analysis of the composite truncated sandwich conical shells (stcs) with various boundary conditions subjected to low velocity impact was studied analytically, based on higher order sandwich panel theory. impact was assumed to occur normally over to the top face-sheet and the contact force history is predicted using two solution models of the motion are derived based on ha...

background: occupational contact dermatitis, especially in hand, is one of the most common occupational disorders. the present study aimed at evaluating patients with occupational allergic contact dermatitis (acd) caused by common allergens based on occupation type and disease history.   methods: this cross-sectional study aimed at evaluating the data of the patients with probable diagnosis of ...

Introduction. Azithromycin is among the broad-spectrum antibiotics that is widely available in various environmental systems and could have destructive effects on the ecosystem and human health due to its bacterial resistance. In this study, removal of azithromycin from wastewater using an advanced oxidation process of ultraviolet light with and without persulfate was investigated and effective...

Soft soil contact models developed for planetary exploration rovers play an important role in the study of rover mobility. Nowadays, most of the existing contact models are based on Bekker theory which requires the evaluation of several soil parameters usually measured via bevameter tests. However, substantial differences existing between the plate-soil contact scenario and the wheel-soil conta...

Methods for multibody modelling and simulation should accurately replicate the dynamic behaviour of rail-wheel interface including precise values for wheel-rail contact positions. This paper studies the development of a novel 3-D wheel-rail contact model which is used for dynamic simulation of a suspended wheelset with parameters listed for a typical Mark IV coach. The contact point locations o...

A finite element model is developed to study the transient thermo-mechanical contact between a rigid sphere and an elastic–plastic sphere. Interference and tangential displacement are applied to the rigid sphere while the elastic–plastic sphere is stationary. The radius of the rigid sphere is larger than that of the elastic–plastic sphere to model flattening. Universal solutions are obtained fo...

Serrated Microstrip Antennas are gaining their importance in the applications of dual and multiband antenna systems. A Serrated cutting edge has many small points of contact with the material being cut. The Serrations are mainly used in the Compact Antenna Test Range (CATR) measurements for the measurement of antenna parameters. In Serrations, by having less contact area than a smooth blade or ...

By means of contact-density chain-growth simulations, we investigate a simple lattice model of a flexible polymer interacting with an attractive substrate. The contact density is a function of the numbers of monomer–substrate and monomer–monomer contacts. These contact numbers represent natural order parameters and allow for a comprising statistical study of the conformational space accessible ...

In a flip-chip-on-glass (FCOG) assembly, anisotropic conductive film (ACF) is used as the adhesive to bind the desired interconnection between the flip chip and glass substrate. However, it remains a challenge to develop the ACF bonded flip chip packages with low contact resistance. Considerable research has been conducted recently to investigate the effect of different parameters on the contac...

This paper presents the experimental evaluation of contact/impact dynamics between a space robot with a compliant wrist and a free-flying object. In capturing a target satellite by a free-flying space robot, a robot must prevent bounce-off of a target satellite from the operational space of the robot due to hard collision. In order to avoid hard collision, the authors propose the use of a stiff...