A CRACKED COLUMN UNDER COMPRESSION

A CRACK REDUCES THE FLEXURAL RIGIDITY OF A COLUMN. THE EFFECTS OF THE REDUCED RIGIDITY ON THE LOAD CARRYING CAPACITY, THE DEFLECTION, AND THE FRACTURE LOAD OF A SLENDER COLUMN WITH A SINGLE-EDGE CRACK HAVE BEEN STUDIED BASED ON THE COLUMN THEORY TOGETHER WITH THE WELL-KNOWN RELATIONSHIP BETWEEN THE COMPLIANCE AND THE STRESS INTENSITY FACTOR OF A CRACKED BEAM. A CRACK REDUCES THE LOAD CARRYING CAPACITY AND INCREASES THE LATERAL DEFLECTION OF A COLUMN UNDER AN ECCENTRIC COMPRESSIVE LOAD. THE CALCULATED DEFLECTION AGREES VERY WELL WITH THE VALUES MEASURED BY LIEBOWITZ, VANDERVELDT AND HARRIS. THE INCREASED LATERAL DEFLECTION INCREASES THE BENDING MOMENT AT THE CRACKED SECTION. THE BENDING STRESS INTENSITY FACTOR OF A CRACKED COLUMN WAS ALSO CALCULATED, WITH THE INCREASED BENDING MOMENT TAKEN INTO CONSIDERATION. THE NET STRESS INTENSITY FACTOR AT THE CRACK TIP IS THE DIFFERENCE BETWEEN THE BENDING AND THE COMPRESSION STRESS INTENSITY FACTORS. THE FRACTURE TOUGHNESS VALUE OBTAINED FROM CRACKED COLUMNS AGREE REASONABLY WELL WITH THE VALUE OBTAINED FROM CRACKED PLATE. THIS STUDY INDICATES THAT THE SUPERPOSITION OF STRESS INTENSITY FACTORS OF THE SAME MODE IS VALID. /AUTHOR/

  • Corporate Authors:

    N/A

    ,   USA 
  • Authors:
    • Okamura, H
    • Liu, H W
    • CHU, C
    • Liebowitz, H
  • Publication Date: 1969

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  • Accession Number: 00209990
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 27 2003 12:00AM