Group of Impact Dynamics and Coupling Effects
Our lab addresses a variety of topics in the general area of mechanics of materials and structures coupled with its working or processing environments, which include the interaction between the structure and fluid, the interaction between the structure and thermal field, and the interaction between the materials and shock loading. The overarching goal is the solution of technological problems through the integration of analytical, computational and experimental techniques. Depending on the specific problem at hand, we study and apply concepts and methods of solid mechanics, fluid mechanics, heat transfer and materials sciences.
- Hydrodynamics & Fluid-Structure Coupling
- Thermal Structures
- Impact Dynamics
• Unsteadycavitating flow mechanism
• Mechanism and dynamic loadings of collapse of cavitation bubbles around the high-speed underwater vehicle in the out-of-water process
• Fluid-structurecoupling of high-speed vehicle during underwater launching process
• Maneuverability of new pattern vehicles in the underwater and surface navigation conditions
• Fluid-structure coupling of the large-scale flexible airship.
• Coupling effects and thermal-fluid-structure interaction in high-speed flights and propulsion systems
• Cellular sandwich structures, light-weight structures and multi-functional design
• High temperature materials and structures; Structural integrity at extremely severe and high temperature environments
• Thermal effects, shock effects and failure mechanisms when high power laser interaction with matter
• Functional materials.
• Brittle materials.
• Metallic materials.
Ultimately, we strive to expand existing and create entirely new and general classes of laser processing techniques that open up novel research opportunities and technologies within our group and for the field as a whole.
- High density laser driven platform
- High-speed impact platform for structures
- High-speed Impact Material Test System (HIMTS)
This platform dedicates to the research of some transient energy transformation process (high-speed deformation of material, laser shock peening and explosive underwater etc.). The high density laser is used as the driven sources which can generated a very high amplitude (up to 5 GPa) pressure pulses in very short time (about 20 ns). A variety of high spatial and temporal resolution test method including PVDF (Polyvinylidene Fluoride), PDV (Photonic Doppler Velocimetry) and high-speed camera etc is adopted to capture the transient process. The main experimental system includes:
• Laser shock peening system
• Dynamic material property system
• Underwater explosive system
HIMTS has an ability to obtain the dynamic stress-strain curve of materials from 102s-1 to 5×104s-1. The diameters of input and output bar are 8mm, 16mm and 25mm. The automatic control system gives 1% accuracy and 250 m/s limit to launch speed. The experimental temperature is from -150~1000 ℃