A Near Zero Poisson-Ratio Honeycomb-like Metastructure Based on Einstein Aperiodic Monotile for Aerospace Composite Materials Applications- The Low-Velocity Impact Study
Abstract
develop a new class of honeycomb-like metastructure based on Einstein aperiodic monotiles for mitigating low-velocity impact damage in sandwich structures. The proposed metastructure, called the Einstein-hat monotile, is a two-dimensional aperiodic monotile that can be indefinitely applied in a plane with numerous local and global interactions. The aperiodic state of the monotile can lead to a zero Poisson condition, as strains in various monotiles can cancel each other out. The project will utilize carbon fiber-reinforced nylon filaments to create the honeycomb-like metastructure due to their excellent impact resistance at low temperatures and low thermal expansion. A design of experiment matrix based on ASTM D638 standard will be developed to understand how additive manufacturing parameters, filament deposition speed, layer thickness, and micro-carbon fiber content affect the overall composite material mechanical properties. The project will also employ finite element modeling (FEM) for predicting stress and strain fields, and digital image correlation (DIC) technique for collecting damage data. The ultimate goal is to develop a semi-analytical-numerical model for predicting damage assessment and design of sandwich structures, particularly for drones.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 06, 2025
- Source ID
- FA95502410251
Entities
People
- Antonio Avila
Organizations
- Air Force Office of Scientific Research
- United States Air Force