Accession Number:

AD0753381

Title:

Preliminary Investigation of High-Velocity Liquid Impact Damage

Descriptive Note:

Corporate Author:

TENNESSEE TECHNOLOGICAL UNIV COOKEVILLE DEPT OF ENGINEERING SCIENCE AND MECHANICS

Personal Author(s):

• Kinslow, Ray
• Sahai, Vireshwar
• Peddieson, Jr, John

Report Date:

1972-12-01

Pagination or Media Count:

159.0

Abstract:

The research reported has been directed toward an understanding of the mechanics of rain erosion of materials traveling at very high velocities. An analysis of the motion of raindrops in a hypersonic shock layer is described. A high-speed jet impingement analogy of the impact of liquid drops on solid surfaces is used to analytically determine the cavity profile. The effect of stress waves generated by liquid impact is discussed. It is shown that internal damage and spallation resulting from stress waves is often much greater than the material failure in the impact area itself. Experiments have demonstrated that water-drop impact can be closely simulated by the use of a high-speed water jet. Craters formed in the laboratory by the jet are compared with those of a radome surface after a led test in a rainfield.

Descriptors:

• *MATERIALS
• *AIRFRAMES
• *SUPERSONIC AIRCRAFT
• STRESSES
• DAMAGE ASSESSMENT
• CRATERING
• FRACTURE(MECHANICS)
• RADOMES
• SPALLATION
• LIQUID JETS
• RAINFALL
• EROSION
• IMPACT SHOCK
• PENETRATION
• RAINDROPS

Subject Categories:

• Aircraft
• Metallurgy and Metallography
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE