THE COMPRESSIVE CREEP BUCKLING OF METAL COLUMNS. PART VI. EFFECT OF INITIAL IMPERFECTION. Period covered April 1, 1957 to March 1, 1958

Technical Report · Wed Apr 30 04:00:00 EDT 1958

OSTI ID:4292519

Rudnick, A; Carlson, R L; Manning, G K

S>Tests were conducted to determine the effect of the initial imperfection of a column on its creep-buckling characteristics. The material used was 6A1-4V titanium alloy. Columns with initial imperfections ranging from L/1OOO to L/70 (where L is the column length) were tested at temperatures of 750, 850, and 9OO deg F. Initial imperfection was found to influence very strongly the creep--buckling behavior of a colnmn. In general, a significant interrelationship was found to exist between column load, lifetime, temperature, and imperfection, i.e., the effects of any one factor are dependent upon the magnitndes or the other factors. The time-dependent secant- and tangent-modulus methods for estimating column capacity were investigated. It is shown that both estimates can be either conservative or nonconservative, depending upon the temperature and initial imperfection of the column. The Larson-Miller time- temperature parameter technique was applied to the data. The use fulness of this and similar parameters for correlating column-creep data is discussed. (auth)

• Research Organization: Battelle Memorial Inst., Columbus, Ohio
• NSA Number: NSA-13-008990
• OSTI ID: 4292519
• Report Number(s): WADC-TR-52-251(Pt. VI); AD-202
• Country of Publication: United States
• Language: English

Related Subjects

CONFIGURATION
CREEP
DEFECTS
MATERIALS TESTING
MECHANICAL STRUCTURES
METALLURGY AND CERAMICS
PRESSURE
TEMPERATURE
TITANIUM ALLOYS