United States Army
Web Based Health Monitoring of Composite Army Bridges
AlphaSTAR developed and validated a web-based hardware/software online Diagnostic Prognostic
System (DPS) and Real-time Intelligent Repair for structural evaluation of the Composite Army
bridge structures. It integrated three technologies: wireless sensing, remote data transmission
of strain and deformation fields, and virtual testing. DPS provided means to monitor the health
of the structure and identify risk and potential failure under service. The technology is applicable
to infrastructure and other critical structures including those used in aerospace commercial
and defense industries, ships and others.
|Overview of Diagnostic Prognostic Repair System|
| F. Abdi, R. Miraj, A. Mosallam, R. Dutton, "DIAGNOSTIC/PROGNOSTIC HELALTH MONITORING SYSTEM AND EVALUATION OF ARMY COMPOSITE BRIDGE", American Society Of Civil Engineers International Committee, Los Angeles Section, 5th International Engineering and Construction Conference (IECC'5), August 27-29, 2008.|
Durability and Reliability of Army Vehicle Components
AlphaSTAR developed and demonstrated computational methods to predict the reliability of components
of US Army ground vehicle structural components. It identified the concept for tools required
to assess the reliability of military vehicle components. The reliability is evaluated in presence
of single or multiple failure modes from fatigue, temperature, and material degradation resulting
from corrosion and erosion. The computational approach takes into account variability (uncertainty)
in material properties, manufacturing process, and usage history.
Pressure Vessels for Solid Rocket Motor Cases
AlphaSTAR used multi-scale progressive failure analysis methods for the analysis and design
of pressure vessels for motor casing applications for the US Army. Filament wound composite
over-wrapped tanks (COPV) were considered for the solid rockets motor cases. AlphaSTAR assessed
the durability and damage tolerance of the COPV. The winding simulation calculated thickness
and ply angle distributions and residual stresses resulting from the wrapping of the tanks.
Durability evaluation predicted accurately micro-crack formation, delamination initiation and
progression, failure modes and burst pressure.