Presentation B

Pagina 1

Group 15 SELF-HEALING MATERIALS FOR SPACE APPLICATIONS 1 General definition of self-healing materials Self-healing materials for space applications Space structures degradation and economic losses from collisions with debris Self-healing materials market growth Conclusions 1 2 3 4 5 2 Self-healing materials 1 How much does the material retain its physical propertiesafter healing? 𝜂 = ℎ𝑒𝑎𝑙𝑒𝑑 𝑃 𝑝𝑟𝑖𝑠𝑡𝑖𝑛𝑒 𝑃 Classification INTRINSIC No separate healing agents, it is a property of the material itself EXTRINSIC External healing components intentionally embedded into the matrix Definition AUTONOMIC Do not require any additional external trigger Damage itself is the stimulus NON AUTONOMIC Require external trigger e.g., heat, light, chemicals Material that has the ability to repair itself when damaged or broken without the need for human intervention 3 Space structures degradation 3 5 Causes of space structures degradation: • Temperature fluctuations • Radiations (UV and GCR) • High vacuum • Atomic oxygen • Mechanical vibrations • DEBRIS IMPACT No autonomous repair leads to failure of the system 2 2 Considerable economic losses are due to the necessity to replace damaged satellites How much? How to bypass the problem? 4 1 Results Satellites economic losses from collisions with debris hMethodology 60 years of space activities • More than 6050 launches • 56450 tracked objects in orbit • Only about 4000 are intact today Economic losses estimation 2 5