A5033803670- High-Velocity Impact and Material Behavior
- Structural Response to Dynamic Loads
- Energetic Materials and Combustion
- Transportation Safety and Impact Analysis
- Material Properties and Failure Mechanisms
- Space Satellite Systems and Control
- Nuclear and radioactivity studies
- Laser-Plasma Interactions and Diagnostics
- Planetary Science and Exploration
- Risk and Safety Analysis
- Fatigue and fracture mechanics
- Numerical methods in engineering
- Aerospace and Aviation Technology
- Mechanical Behavior of Composites
- Computational Fluid Dynamics and Aerodynamics
- Polymer crystallization and properties
- Particle Dynamics in Fluid Flows
- Advanced Aircraft Design and Technologies
- Geophysical Methods and Applications
- Air Traffic Management and Optimization
- Cellular and Composite Structures
- Titanium Alloys Microstructure and Properties
- Rock Mechanics and Modeling
- Silicone and Siloxane Chemistry
- Engineering and Material Science Research
Texas A&M University System
2021-2023
Texas A&M University
2020-2022
Mitchell Institute
2021-2022
Walker (United States)
2020
Mississippi State University
2017
Novel engineering materials and structures are increasingly designed for use in severe environments involving extreme transient variations temperature loading rates, chemically reactive flows, other conditions. The Texas A&M University Hypervelocity Impact Laboratory (HVIL) enables unique ultrahigh-rate characterization, testing, modeling capabilities by tightly integrating expertise high-rate behavior, computational polymer chemistry, multi-physics multiscale numerical algorithm...
A comprehensive overview of state-of-the-art experimental, theoretical and numerical methods that aid understanding predicting the quasi-brittle fracture behavior plain concrete under quasi-static conditions is presented in this work. The main objectives paper are as follows: (a) to lay-out a systematic manner for experimental modeling people select their choice simulating tool, (b) critically describe advantages disadvantages conducting different set-ups researchers intending perform own...
For vehicles traveling at hypersonic speeds through the atmosphere, impact with rain droplets and particulates can be catastrophic. At these conditions, spatially temporally resolved data of particle events are scarce because experimental challenges in ground tests probing phenomena objects droplet fields. To address this need, we employed a two-stage light gas gun (2SLGG) to accelerate projectiles 2–3 km/s (~Mach 6–9) ambient conditions. A MHz-rate schlieren system was used provide images...
View Video Presentation: https://doi.org/10.2514/6.2021-0725.vid The study of hypervelocity impacts (HVIs) is increasing interest in numerous engineering applications involving micrometeoroids, orbital debris, hypersonic vehicles, and weapons systems. associated relative velocities are typically excess several kilometers per second. experimental modeling studies HVIs instrumental damage estimation designing protective armor for personnel hardware. In typical HVIs, debris clouds formed at the...
As time progresses, space becomes more congested with micrometeoroids and orbital debris (MMOD). This increase in flux poses a critical threat to satellites already orbit, manned missions, future orbiting spacecraft. To reduce the operational impact of MMOD collisions, current protection schemes use Whipple Shields, an aluminum plate prescribed standoff distance, as basis for protection. These shields are manufactured installed on vehicle while Earth, which constrains their size shape,...
When developing protective structures to defend against hypervelocity impacts (HVIs), optimizing specific energy dissipation is critical. Incorporation of lightweight materials, such as polymers, into novel layered shielding concepts could improve HVI performance in space and military applications without compromising cost or weight. One key challenge a fundamental understanding the effects molecular architecture on macroscopic dynamic material response damage formation. In this work, two...
(2020). Development and validation of finite element impact models high-density UAS components for use in air-to-air collision simulations. Mechanics Advanced Materials Structures: Vol. 27, Special Issue honoring Dr. Junuthula N. Reddy Texas A & M University receiving the 2019 ASME Timoshenko Medal, pp. 1178-1199.
Existing studies show that small fixed-wing unmanned aircraft systems’ (FWUASs) mid-air collisions with can cause substantial damage. Upon a 250 knots impact, ~1.8 kg “tractor” configuration of FW-UAS perforate skin, thereby damaging the internal structures such as ribs, frames, etc., posing severe threat to manned air fleet. Significant damage is primarily caused by FW-UAS’s heavy and rigid components motor, battery, payload especially due their roughly in-line arrangement proximity one...
In this study, hypervelocity impact experiments were performed on both unstitched and through-thickness Vectran™-stitched laminates. Both laminate types fabricated from DMS-2436 class-72 warp-knit multiaxial carbon fabric, infused with API-1078 resin using a Controlled Atmospheric Pressure Resin Infusion (CAPRI) process. The laminates impacted by 4 mm diameter, spherical, Nylon 6/6 projectiles at nominal velocities of km/s two-stage light gas gun. primary measures the performance composite...