Loading...
Please wait, while we are loading the content...
Similar Documents
Impact damage and strain rate effects for toughened epoxy composite structures
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Chamis, Christos C. Minnetyan, Levon |
| Copyright Year | 2006 |
| Description | Structural integrity of composite systems under dynamic impact loading is investigated herein. The GENOA virtual testing software environment is used to implement the effects of dynamic loading on fracture progression and damage tolerance. Combinations of graphite and glass fibers with a toughened epoxy matrix are investigated. The effect of a ceramic coating for the absorption of impact energy is also included. Impact and post impact simulations include verification and prediction of (1) Load and Impact Energy, (2) Impact Damage Size, (3) Maximum Impact Peak Load, (4) Residual Strength, (5) Maximum Displacement, (6) Contribution of Failure Modes to Failure Mechanisms, (7) Prediction of Impact Load Versus Time, and (8) Damage, and Fracture Pattern. A computer model is utilized for the assessment of structural response, progressive fracture, and defect/damage tolerance characteristics. Results show the damage progression sequence and the changes in the structural response characteristics due to dynamic impact. The fundamental premise of computational simulation is that the complete evaluation of composite fracture requires an assessment of ply and subply level damage/fracture processes as the structure is subjected to loads. Simulation results for the graphite/epoxy composite were compared with the impact and tension failure test data, correlation and verification was obtained that included: (1) impact energy, (2) damage size, (3) maximum impact peak load, (4) residual strength, (5) maximum displacement, and (6) failure mechanisms of the composite structure. |
| File Size | 4535135 |
| Page Count | 25 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20060021978 |
| Archival Resource Key | ark:/13960/t7jq5z36n |
| Language | English |
| Publisher Date | 2006-05-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Structural Design Epoxy Matrix Composites Structural Failure Failure Analysis Dynamic Loads Impact Tests Composite Structures Impact Damage Fracturing Residual Strength Loads Forces Strain Rate Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
