Parametric Study
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2022 ◽  
Vol 48 ◽  
pp. 103975
Yuxuan Zhang ◽  
Mehdi Vahabzadeh Bozorg ◽  
Juan F. Torres ◽  
Yongling Zhao ◽  
Xiaolin Wang

Berkane Aicha ◽  
Samy Mezhoud ◽  
Bouzid Tayeb ◽  
Karech Toufik ◽  
Noui Abdelkader

2022 ◽  
pp. 073168442110548
Ang Li ◽  
Rahul Vallabh ◽  
Philip D Bradford ◽  
David Kim ◽  
Abdel-Fattah M Seyam

The development of hull material with ideal properties to meet all the operation requirements has posed the greatest challenge to flying the airship at high altitude for extended periods. Materials developed in our previous study with a laminated structure achieved high strength-to-weight ratio and excellent gas barrier property at a relatively low total weight. To optimize this novel design and obtain a more comprehensive understanding of the laminate properties, a parametric study involving lamination process parameters (temperature and time), and laminate structural parameter (reinforcement fabric construction), was conducted. The effects of lamination parameters on tensile, peel, tear and helium permeability tests were carried out to assess the laminates. It was found that the tensile strength of the laminate is predominantly determined by the fabric reinforcement material properties. The peel and tear strength results showed that increasing the lamination temperature from 185 °C to 200 °C improved respective strength values. Additionally, the analysis of failure modes and tear propagation suggested that laminate samples with progressive failure have better tear resistant property over those with brutal failure. Extremely low helium permeability was achieved, yet the gas barrier property was not affected by the lamination process parameters and fabric type.

Heat Transfer ◽  
2022 ◽  
Yang Yu ◽  
Xiao‐Ni Qi ◽  
Xiao‐Chen Hou ◽  
Xiao‐Hang Qu ◽  
Qian‐Jian Guo ◽  

2022 ◽  
Vol 58 (4) ◽  
pp. 147-157
Elena-Felicia Beznea ◽  
Nicusor Baroiu ◽  
Ionel Chirica

A study on the static analysis of a naval panel made of composite sandwich materials is presented. By using FEM, the modeling of a naval floor with a length of 5 m and a width of 2.5 m is performed. Two distinct cases, have been performed: the first model consists of the plate and stiffeners made of steel and the second model concerns a panel made of composite material sandwich type steel / SANFoam103 / steel, and the stiffeners made of steel. A parametric study has been performed. The thickness of the steel faces have 6 mm, and for the core of SANFoam have been selected the thicknesses 5 mm, 10 mm, 20 mm, 40 mm.

2022 ◽  
Rachel Hytovick ◽  
Hardeo M. Chin ◽  
Kareem A. Ahmed

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