A New Design of Inflatable and Lightweight Device for Planetary Exploration

Hou

et al. 2014

AMR

Self Cite

Near space airship increasingly becomes a research hotspot with its inclusive potential military and civilian values. It is necessary to consider single and multiple-coupling space environment effects on evaluating envelope tearing damage mechanisms. The basic characteristics of the space environment and the complexity of tear damage mechanism are introduced, and this presentation also summarizes the research status of the tear damage mechanical mechanism and damage properties under the influence of the multiple space environment factors of high-performance airship envelope. Besides, the main existing problems and prospect in tear damage characterization under real working condition are discussed. The study provides some technical support for high-performance and protecting tearing damage design on airship envelope.

Section: Researches On Mechanical Characteristics Of Flexible Materia...mentioning

confidence: 99%

Review and Prospect on Tear Damage Research for High-Performance Flexible Fiber-Reinforced Composite Material

Hou

et al. 2014

AMR

Self Cite

“…With the development of high strength envelope material and cycle solar energy technology, the near space airship attract more and more interest of researchers [1]. As near space airship plays critical roles in various areas involving long-term floating in space, high detection, fixed floating, operational effectiveness evaluation, missile defense, ECM (electronic countermeasures) and others [2].However, it is a quite long way to realize engineering application of high altitude long-term floating airship in near space [3]. And with the severe influence of wind, thermo, UV (ultraviolet) and other stratospheric environmental factors, the mechanics and reliability of flexible envelope composite material degenerate gradually.…”

Section: Introductionmentioning

confidence: 99%

Ground Simulation Method for Envelope Performance of Airship in near Space

et al. 2014

AMR

Self Cite

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.

“…Stress concentration and elongation deformation are the main reason causing envelope material damage and destroy. CTOD can be used to test fracture toughness [3].…”

Section: Introductionmentioning

confidence: 99%

Study on Fiber-Reinforced Laminated Composite Textile Tearing Behavior and Strength Prediction

et al. 2014

AMM

Self Cite

The tearing behavior of fiber-reinforced laminated composite textile plays the key role in the decision of mechanics performance of high altitude airship envelop material, even directly deciding its safety and stability. This paper, based on typical woven fabricated fiber yarns’ characteristics of geometry and mechanics, adopts Euler-displacement deformation analysis to explore yarn bundles deformation effects on tearing behavior and strength of envelope material with prefabricated damage and crack. Also, models with prefabricated crack with different size and textile density are respectively built to find factors that affect tearing behavior and strength of envelope material. From tests, it can be observed that the built models for predicting its tearing strength are in conformity with the experimental data. Nonlinear relationship is reflected between the initial crack width or yarn bundles density with tearing strength. Conclusively, the methods and models adopted in this paper provide an effective and innovative mind on tearing behavior and strength of fiber reinforced envelope material and make the foundation for its engineering application.