A numerical tool is proposed to simultaneously assess various damage mechanisms that are driven by contact loading. The transfers loads the contact-patch level using three parameters: maximum pressure (pmax), creepage (c) and length (2a). local wear RCF predictions implemented based on existing models from literature. load input can originate vehicle–track simulations or manual of user. assessm...

Composite patches are widely accepted as a useful practice for the repair of cracked aircraft components and method is vital importance to final performance repaired structures. The present research experimentally studied efficiency processing stability pre-cured, prepreg (including unidirectional plain weave prepregs) wet-layup methods use on Ti-alloy panels through configuration butt joint bo...

the dynamic response of a transversely isotropic, linearly elastic layer bonded to the surface of a half-space of a different transversely isotropic material under arbitrary shape surface loads is considered. with the help of displacements and stresses green’s functions, an analytical formulation is presented for the determination of the displacements and stresses at any point in both surface l...

The fluxes of energy, matter, and organisms are important structuring forces of metaecosystems. Such ecosystem fluxes likely interact with environmental heterogeneity and differentially affect the diversity of multiple communities. In an aquatic mesocosm experiment, we tested how ecosystem flux and patch heterogeneity affected the diversity of bacteria, phytoplankton, and zooplankton metacommun...

In this communication, a graphene-based radiator is designed and analyzed at THz frequency. A tilted dumbbell-shaped aperture loaded on graphene patch for creating degenerated orthogonal mode with 90° phase shift, which in turn produces circularly polarized (CP) waves. Graphene placed over SiO2 substrate. Slot loading shifts the frequency band due to reduction effective permittivity. Another im...

In this paper, a novel multi-frequency microstrip antenna with complementary ring slot resonator (CRSR) structure that satisfies Bluetooth, worldwide interoperability for microwave access (WiMAX), and wireless local area network (WLAN) applications is proposed. The conventional consists of circular patch at resonance frequency band 2.5 GHz. By loading two CRSR the radiating element, three opera...

The electric-controlled metasurface antenna array (ECMSAA) with ultra-wideband frequency reconfigurable reflection suppression is proposed and realized. Firstly, an in-phase characteristics designed. element of the ECMSAA constructed by loading single unit on conventional patch element. radiation properties performance are maintained when integrated. Thus, elements have excellent simultaneously...

A broadband and planar multiple-input multiple-output (MIMO) antenna with pattern diversity is presented in this letter. The four-port MIMO designed by using a novel metamaterial structure small dimensions of 60 × 1.6 mm3. Each radiating element the comprised composite right/left-hand (CRLH) transmission lines (TLs). Between its four elements, there are open L-shaped slot loading on ground plan...

abstract competition is a phenomenon that influences the size, structure and stability of insect communities, particularly on solitary endoparasitoids species. although, competition normally incurs costs, it might be adaptive for the surviving individual. to determine which factors affect the patch use strategy of foragers under competition, the effect of previous experience with hosts already-...

Near-field microwave investigation and tomography has many practical applications, especially where the trend of fields signals in different environments is vital. This article shows an elliptical patch ultra-wideband antenna fed by a transmission line for near-field characterization cancerous cells skin. The comprises patch, stub loading to shift band lower bands, electronic bandgap structure ...