A5006009354- Structural Response to Dynamic Loads
- Mechanical Behavior of Composites
- High-Velocity Impact and Material Behavior
- Cellular and Composite Structures
- Elasticity and Material Modeling
- Polymer composites and self-healing
- Structural Integrity and Reliability Analysis
- Structural Analysis of Composite Materials
- Composite Structure Analysis and Optimization
- Vibration and Dynamic Analysis
- Dynamics and Control of Mechanical Systems
- Energetic Materials and Combustion
- Hydrogen embrittlement and corrosion behaviors in metals
- Corrosion Behavior and Inhibition
- Fluid Dynamics Simulations and Interactions
- Rheology and Fluid Dynamics Studies
- Structural Health Monitoring Techniques
- Geotechnical Engineering and Underground Structures
- Polymer Foaming and Composites
- Structural Analysis and Optimization
- Fatigue and fracture mechanics
- Material Properties and Processing
- Mechanical stress and fatigue analysis
- Textile materials and evaluations
- Polymer Nanocomposites and Properties
University of Akron
2014-2024
Massachusetts Institute of Technology
1990-1996
University of California, Berkeley
1993-1994
Analytical solutions for the deformation, penetration, and perforation of composite plates sandwich panels subjected to quasi-static punch indentation projectile impact are derived. Discrete spring-mass models used calculate response panels. Equivalent load resistance functions obtained from analysis adjusted high strain rate. A generalized solution methodology then proposed based on three key factors: (i) contact duration, (ii) through-thickness transit time, (iii) lateral time....
Analytical solutions were derived for the transient response and damage initiation of a foam-core composite sandwich panel subjected to blast loading. The was modeled in two consecutive phases: (1) through-thickness wave propagation phase leading permanent core crushing deformations (2) transverse shear resulting global deflections. predicted deformation consisting E-glass vinyl ester facesheets H100 PVC foam compared well with ABAQUS predictions. predictions critical impulse several panels also
Analytical models for the static and low-velocity perforation of composite sandwich panel with woven E-glass/epoxy prepreg facesheets aluminum honeycomb core are developed. The analytical based on a set experimental results. A three-stage process involving consecutive failures top facesheet, core, bottom facesheet is proposed. predictions failure loads deformation within 10 8% test data, respectively. predicted ballistic limit 10% while total energy dissipated at 18%
A rate-dependent constitutive model for carbon fiber-reinforced polymers was developed by assuming that the characteristics of composite could be described stress relaxation polymer matrix. Relaxation functions in longitudinal, transverse, and in-plane shear modes were derived terms separate matrix fiber properties rules mixture. The epoxy represented as two Maxwell elements parallel with a linear elastic spring, while modeled spring. rate-dependent, laminate stiffness unidirectional...
A numerical simulation of the aircraft impact into exterior columns World Trade Center (WTC) was done using LS-DYNA. For simplification, fuselage modeled as a thin-walled cylinder, wings were box beams with fuel pocket, and engines represented rigid cylinders. The WTC beams. Actual masses, material properties dimensions Boeing 767 used in this analysis. It found that about 46% initial kinetic energy to damage columns. minimum velocity just penetrate would be 130m∕s . also traveling at top...