Abstract
A super pressure balloon (SPB) is an aerostatic balloon that can fly at a constant altitude for an extended period. Japan Aerospace Exploration Agency (JAXA) has been developing a light-weight, high strength balloon made of thin polyethylene films and diamond-shaped net with high tensile fibers. Previous investigations proved that strength requirements on SPB members are satisfied even though the net covering the SPB sometimes becomes damaged during the inflation test. This may be due to non-uniform expansion, which causes stress concentration, however, no method exists to confirm this hypothesis. In this study, we tested a new method called Simplified Digital Image Correlation method (SiDIC) to check if it can measure the displacement of the SPB by using a rubber balloon. After measuring the measurement accuracy of the Digital Image Correlation method (DIC) and SiDIC, we applied both DIC and SiDIC to a rubber balloon covered just with the net. Interestingly, SiDIC entailed a smaller amount of data but could measure the deformation more accurately than DIC. In addition, assuming the stress concentration, one part of the net was bonded to the balloon to restrict the deformation. SiDIC properly identified the undeformed region.
Highlights
A super-pressure balloon (SPB) is a vehicle that can fly at a constant altitude for an extended period to perform scientific observations at a fraction of the cost of using a satellite
Japan Aerospace Exploration Agency (JAXA) has been developing a lightweight, high strength balloon made of thin polyethylene films and a diamond-shaped net with high strength tensile fibers
We used a rubber balloon covered with both spray patterns and a net to analyze it with Digital Image Correlation method (DIC) and Simplified DIC (SiDIC)
Summary
A super-pressure balloon (SPB) is a vehicle that can fly at a constant altitude for an extended period to perform scientific observations at a fraction of the cost of using a satellite. This method may be able to detect the stress concentration on the SPB [12] It is not suitable of a test piece in a tensile test and in fracture mechanics problems and bioengineering applications to study the shape of SPBs, as ink spots on the thin film may affect its strength and weight properties. Be applied to the surface, will it weigh more and the polyethylene film will not stretch To overcome this problem, a Simplified DIC (SiDIC) using intersection detection technology was uniformly due to curing of the ink. Developed, which allowed us to track the diamond-shaped weave of the net so that we could measure To overcome this problem, a Simplified DIC (SiDIC) using intersection detection technology was the deformation ofallowed the SPBus during thethe pressurization process. SiDIC is a simple and efficient method for measuring the SPB’s deformation field
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
