BUCKLING ANALYSIS OF LAMINATED SANDWICH BEAM WITH SOFT CORE
Keywords:SANDWICH BEAM, SOFT CORE, ZIGZAG THEORY, FINITE ELEMENT, STRESS CONTINUITY
STABILITY ANALYSIS OF LAMINATED SOFT CORE SANDWICH BEAM HAS BEEN STUDIED BY A C0 FE MODEL DEVELOPED BY THE AUTHORS BASED ON HIGHER ORDER ZIGZAG THEORY (HOZT). THE IN-PLANE DISPLACEMENT VARIATION IS CONSIDERED TO BE CUBIC FOR THE FACE SHEETS AND THE CORE, WHILE TRANSVERSE DISPLACEMENT IS QUADRATIC WITHIN THE CORE AND CONSTANT IN THE FACES BEYOND THE CORE. THE PROPOSED MODEL SATISFIES THE CONDITION OF STRESS CONTINUITY AT THE LAYER INTERFACES AND THE ZERO STRESS CONDITION AT THE TOP AND BOTTOM OF THE BEAM FOR TRANSVERSE SHEAR. NUMERICAL EXAMPLES ARE PRESENTED TO ILLUSTRATE THE ACCURACY OF THE PRESENT MODEL.
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