ひずみ範囲分割法によるはんだの疲労寿命評価法

概要

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Torsional fatigue tests were performed on 60Sn-40Pb solder under strain control, and a method for the solder fatigue life prediction was investigated. The type of specimen was a thin-walled cylinder. Two cycling frequencies of 0.001 Hz and 0.01 Hz were used at 303 K. Using the test data at 0.03-1.0 Hz shown in the previous paper, as well as the present test data, the following results were obtained. ( 1 )The fatigue life and the plastic shearing strain range, which was found by a partition of the inelastic shearing strain range, could be correlated by the Coffin-Manson law for each cycling frequency. ( 2 )A life prediction formula was obtained on the basis of the strain-range partitioning approach and the linear cumulative damage rule for the superposition of both plastic and creep deformations. The values calculated by the formula nearly coincided with the test results.
社団法人日本機械学会の論文
1992-05-25