| About this Abstract |
| Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Presentation Title |
Assessing Impact Efficacy of Novel Additively Manufactured Sandwich Structures |
| Author(s) |
Sean Eckstein, George Youssef, Paul Kauvaka |
| On-Site Speaker (Planned) |
Sean Eckstein |
| Abstract Scope |
Sandwich structures (fiber-reinforced composite skins and foam cores) are ubiquitous in defense, aerospace, and sports applications due to their superior specific properties, e.g., improved stiffness-to-weight ratio. The mechanics of sandwich structures attracted assiduous research under a broad range of operating and loading conditions, including a wide range of strain rates. However, introducing additive manufacturing (3D printing) of composite skins and considering novel core polymeric materials necessitate the exploration of the process-property interrelationship with emphasis on impact loading scenarios, given their strain rate sensitivity. Therefore, the overarching objective of the research leading to this presentation is to reveal the effect of processing conditions on the impact efficacy of additively manufactured sandwich structures. The approach hinges on the physical demonstration of 3D printed skins using an advanced robotic platform capable of realizing continuous carbon fiber polymer matrix composite materials as a function of a broad range of geometries and stacking sequences. The 3D printed skins are adhered to polyurea foam cores with superior impact efficacy under a broad range of strain rates. The assembled sandwich structures are submitted to high-speed impacts from a flattop projectile propelled from an instrumented small-scale shock tube. The sandwich samples are rested on equipped-pedestal while the deformation is captured using a high-speed camera to resolve the full-field strains using digital image correlation. The impact data is synthesized to assess the impact efficacy while elucidating the failure modes. The outcomes of this research progress this novel class of materials towards certification and qualification for mission-critical applications. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |