| Autor: |
Ohno, Nobutada, Mizushima, Satoshi, Tanie, Hisashi |
| Zdroj: |
Key Engineering Materials; August 2014, Vol. 626 Issue: 1 p178-181, 4p |
| Abstrakt: |
The cyclic growth and recovery of warpage were observed in experiments on Si/solder/Cu layered plates subjected to cyclic thermal loading [1]. In the present study, the experiments were analyzed using representative material models for the solder and Cu layers in finite element analysis. The warpage growth/recovery behavior observed was reproduced well in the analysis using the Armstrong-Frederick and Ohno-Wang models for the solder and Cu layers, respectively. Material ratcheting due to non-proportional cyclic loading was found to happen in the solder layer as a consequence of the CTE mismatch, while material ratcheting due to proportional cyclic loading occurred in the Cu layer as a result of the significant temperature dependence of viscoplasticity in the solder layer. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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