Aerospace Science and Technology
Numerical Calculation of Fracture Parameters in Grooved Rotating Disc Containing Three-dimensional Semi-elliptical Crack Under Mixed Mode Loading

Seyed mohammad navid Ghoreishi; Bahar Salimi

Articles in Press, Accepted Manuscript, Available Online from 30 September 2023

https://doi.org/10.22034/jast.2023.398765.1151

Abstract
  In this study, a comprehensive investigation of the fracture parameters in a grooved rotating disc containing a three-dimensional semi-elliptical crack under different working conditions has been investigated. In this regard, three models of radial, circumferential and inclined crack with an angle of ...  Read More

Aerospace Science and Technology
The role of unmanned aerial vehicles in future smart cities

Ali Mirzaee kahagh; Alireza Sekhavat Benis

Articles in Press, Accepted Manuscript, Available Online from 14 November 2023

https://doi.org/10.22034/jast.2023.395152.1148

Abstract
  The current research was conducted with the aim of identifying the role of unmanned aerial vehicles in future smart cities. The current research was conducted in terms of mixed statistical methods (qualitative-quantitative). The participants of the qualitative part, which was implemented based on the ...  Read More

Aerospace Science and Technology
Optimal Path Planning of a Spacecraft via a Deep Neural Network for Soft Landing on the Irregular-Shaped 433 Eros Asteroid

Fahimeh Barzamini; Jafar Roshanian; Mahdi Jafari-Nadoushan

Articles in Press, Accepted Manuscript, Available Online from 09 December 2023

https://doi.org/10.22034/jast.2023.423239.1168

Abstract
  This paper aimed to utilize a Deep Neural Network (DNN) to achieve optimal path planning for a spacecraft during a landing mission on an asteroid. A minimum energy-consumption mission is evaluated in which a DNN is utilized to predict the optimal path in case of any failures or unforeseen alterations. ...  Read More

Aerospace Science and Technology
The New Hybrid Meta-Model by Using DOE and RSM for Liquid Propellant Engine’s Feed System Optimization

Hamid reza Ali mohamadi; Hassan Naseh; Fathollah Ommi

Articles in Press, Accepted Manuscript, Available Online from 27 December 2023

https://doi.org/10.22034/jast.2023.367044.1135

Abstract
  The present paper strives for optimization of the Liquid-Propellant Engine (LPE)’s feed system. To this end, the new hybrid meta-model methodology by utilizing the Design of Experiment (DOE) method and the Response Surface Method (RSM) were developed and implemented as two effective means of designing, ...  Read More

Aerospace Science and Technology
Experimental investigation of vortical flow induced by canard on a diamond wing equipped with LEX

Mohammad Reza Hashemi; Seyyed Majid Malek Jafarian; Mojtaba Dehghan Manshadi

Articles in Press, Accepted Manuscript, Available Online from 29 December 2023

https://doi.org/10.22034/jast.2023.417448.1160

Abstract
  In this research, the effects of canard flow on a diamond wing equipped with LEX, same as new-generation fighters, have been investigated, using a closed-circuit wind tunnel. All tests were performed at a speed of 12.5 meters per second, which is equivalent to Reynolds number 214000 based on model length. ...  Read More

Aerospace Science and Technology
Investigation of effective parameters on graphite distribution in FGM structure of A356/Al2O3/Gr composite

Ali Alizadeh; Mohsen Heydari Beni; Jafar Eskandari Jam

Articles in Press, Accepted Manuscript, Available Online from 27 January 2024

https://doi.org/10.22034/jast.2024.430111.1171

Abstract
  In this research, aluminum/alumina/graphite hybrid composite was prepared by horizontal centrifugal casting method, and the microstructure and distribution of alumina and graphite particles in the radial direction of the cross-sectional area of the samples were investigated. The distribution of graphite ...  Read More

Aerospace Science and Technology
Analyzing the effect of helicopter pilot cushion on body vibrations through numerical and analytical investigation

Heshmatollah MohammadKhanlo; Ali Nouri; Seyed Mohammad Kamali

Articles in Press, Accepted Manuscript, Available Online from 06 February 2024

https://doi.org/10.22034/jast.2024.419274.1164

Abstract
  Exposure to vibrations of certain frequencies can pose a risk to the pilot's body. During flight, the maneuvers performed by the pilot expose them to sudden and unfavorable accelerations, which can cause physical, physiological, and psychological problems. Research suggests that the use of seat suspension ...  Read More

Aerospace Science and Technology
Advancing Flexible Rope Motion Measurement in Aerospace: Vision-Based Innovations for Enhanced Accuracy and Efficiency through Edge Segmentation

Mohammad Hassan Pachenari

Articles in Press, Accepted Manuscript, Available Online from 13 February 2024

https://doi.org/10.22034/jast.2024.418390.1161

Abstract
  Flexible ropes have wide-ranging applications in aerospace engineering, yet accurately measuring their motion state without disrupting dynamic characteristics remains a challenge. This study introduces a visual measurement method aimed at precisely assessing flexible rope motion to support the development ...  Read More