| 摘要 |
PROBLEM TO BE SOLVED: To estimate a life cycle number of a solder-joining part, taking even a length of a crack into account. SOLUTION: The cycle number up to a service life is divided into a crack generation life and a crack progress life, the former is found pursuant to the Coffin-Manson law, and the latter is found by fracture mechanical approach based on a crack progress characteristic evaluation result. COPYRIGHT: (C)2004,JPO
|
