in this research, the calculation method of aerodynamic loads on an airplane in all flight situations is presented. in order to find an calculation equation for aerodynamic loads on an airplane in all flight conditions, the f-5 aircraft is selected as a prototype is divided into one hundred small parts longitudinally. therefore, the numerical solutions are taken place in different conditions of...

BACKGROUND A stable assessment of cognition is of paramount importance for forensic psychiatric patients (FPP). The purpose of this study was to compare repeated measures of IQ scores in FPPs with and without intellectual disability. METHODS Repeated measurements of IQ scores in FPPs (n = 176) were collected. Differences between tests were computed, and each IQ score was categorized. Addition...

in this research a new approach is proposed for elasto-plastic analysis of structures with truss elements. this method covers both perfectly plastic and hardening properties. the proposed technique uses substituting virtual loads instead of modifying the stiffness matrix. to solve this kind of problems, complementary programming is utilized. numerical examples demonstrate that elastoplastic ana...

background: work-related musculoskeletal disorders (wmsds) are a leading cause of disability and workers compensations. objectives: the research was done in tehran pars-electric factory to prevent inducing wmsds. rapid entire body assessment (reba) was carried out to assess musculoskeletal loads on workers due to their postures, repetition, and force. nordic musculoskeletal questionnaire (nmq) ...

Crowd jumping loads are often simplified to a single-point excitation in the existing Fourier series-based models, most of which lack data support crowd experiments. A multi-point model for is herein developed, where two parameters, frequency, and time lag shift, selected quantify synchronization. After verification 3D motion capture technology, probability distributions frequency shift modeled...

STUDY DESIGN Biomechanical human cadaveric study comparing straight and scoliotic spines with healthy and degenerated L4/5 discs. OBJECTIVE To describe the biomechanical environment of discs under various spinal alignments by measuring the coronal intradiscal pressure profiles. SUMMARY OF BACKGROUND DATA Abnormal loading of the lumbar discs in the concavity of scoliotic curves may accelerat...

The bending and critical buckling loads of a sandwich beam structure subjected to thermal load axial compression were simulated temperature distribution across layers was investigated by finite element analysis validated analytically. consisted two face sheets core, carbon fiber foam used as sheet core respectively for more efficient stiffness results. repeated with different materials reduce s...

In this paper, the flexural strength and buckling of partially concrete-filled steel tubes (PCFST) under laterally repeated loads was investigated through three-point bending test configuration. Three-dimensional Finite Element (FE) models tests PCFST were developed, in which concrete filling modelled using elastic-plastic-fracture model capturing crack development tube elastic-plasticity model...

Aims: The aim of this study was to develop the mathematical models linear elasticity theory biomaterials by taking into account their fractal structure. This further aimed construct a variational formulation problem, obtain main relationships finite element method calculate rheological characteristics biomaterial with structure, and application software for calculating components stress-strain ...