Accession Number:

AD0679767

Title:

SIMPLE INSTABILITY MECHANISMS FOR DYNAMIC LOADING.

Descriptive Note:

Final rept. 1 Oct 66-31 Jan 68,

Corporate Author:

TUFTS UNIV MEDFORD MASS DEPT OF CIVIL ENGINEERING

Personal Author(s):

• Sutcliffe,Samuel

Report Date:

1968-03-07

Pagination or Media Count:

55.0

Abstract:

An experimental investigation was undertaken of the potential of certain elastic instability mechanisms in the generating of low rise-time direct and torsional force pulses. Direct pulses were produced by the coupled flexural-axial response of a supercritically loaded column. The behavior of the system was correlated with analysis, and a system designed to operate in the range of rise-times of 10 microseconds to 50 microseconds. Torsional pulses were produced by the application of a dynamic axial surcharge load to a statically buckled twist buckling element. The system was found to produce a combined axial and torsional output, each having the same shape as the input pulse. A peak torque of 12 inch-pounds and rise-times of less than 90 microseconds were observed. Author

Descriptors:

• (*TEST EQUIPMENT
• *LOADS(FORCES))
• STABILITY
• FORCE(MECHANICS)
• TORSION
• PULSES
• DYNAMICS
• BUCKLING
• BEAMS(STRUCTURAL)

Subject Categories:

• Test Facilities, Equipment and Methods
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE