Ground Simulation Method for Envelope Performance of Airship in near Space

2014 ◽  
Vol 989-994 ◽  
pp. 3473-3476
Author(s):  
Long Bin Liu ◽  
Pan Pan Mi ◽  
Shuai Cao ◽  
Ming Yun Lv
Keyword(s):  
Mechanical Test ◽  
High Strength ◽  
Simulation Method ◽  
Test Methods ◽  
Simulation Test ◽  
Near Space ◽  
Envelope Material ◽  
Environmental Test ◽  
Ground Test ◽  
Weather Resistance

Performing characteristics on envelope composite of near space airship (NSA) are quite different from that of the low altitude airship essentially. The NSA envelope material should meet excellent applicative characteristics including light weight, high strength, anti-aging, anti-ultraviolet radiation, gas-tightness, weather resistance. Ground simulation test is critical for the envelope design and development process of NSA, and the environmental features of near space is analyzed for NSA, then corresponding ground simulation test methods are proposed to involve mechanical strength of the ground test methods among the changing weather temperature and over pressure changes, materials weather resistance and air tightness test. Finally the coupling relationship between various mechanical test and environmental test methods is also investigated.

Role of the Physical Simulation for the Estimation of the Weldability of High Strength Steels and Aluminum Alloys

2015 ◽  
Vol 812 ◽  
pp. 149-154 ◽  
Author(s):  
János Lukács ◽  
László Kuzsella ◽  
Zsuzsanna Koncsik ◽  
Marcell Gáspár ◽  
Ákos Meilinger
Keyword(s):  
Physical Simulation ◽  
High Strength Steels ◽  
High Strength ◽  
Tensile Tests ◽  
Test Methods ◽  
Hot Cracking ◽  
Simulation Test ◽  
Gleeble 3500 ◽  
Welding Processes

The physical simulation is an ultimate innovative way to develop the welding processes. The paper introduces the connection between weldability and physical simulation, hot-cracking sensibility, the Gleeble 3500 thermo-mechanical physical simulator, respectively. Four kinds of materials were investigated and different kinds of physical simulation test methods were made such as, identification of the Nil-Strength Temperature (NST), hot tensile tests (on heating and on cooling parts of the welding simulation curve are also investigated). Furthermore, Heat Affected Zone (HAZ) tests are being introduced. The future approaches of the research are also exposed.

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