BONDED ARTICLE BONDING STRENGTH-ESTIMATING METHOD, DEFORMED CONDITION ESTIMATING METHOD, AND BONDING CONDITION-DETERMINING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a method for estimating the bonding strength of a bonded article without carrying out any strength test in the friction stir welding.;SOLUTION: In the bonding strength estimating method, a bonding tool 4 is pressed in the depressing direction, the case in which the heat input according to the bonding condition is given to an article 3 to be bonded is numerically analyzed, and the deformation state and the temperature distribution of the article 3 taking into consideration the effect of the friction heat are calculated. Based on the result, the case in which the bonding tool 4 is rotated is numerically analyzed to calculate the strain area to generate strain in the article 3. Based on the strain area, the bonding length D and the bonding height H to express the deformation state of the work 3 are obtained to calculate the bonding strength of the article 3. By performing the numerical analysis in this procedure, the bonding strength of the article can be calculated without carrying out the strength test.;COPYRIGHT: (C)2005,JPO&NCIPI