Crack extension research of FR4 substrate embedded 90Â°bend optical fiber under the random vibration
Wei Li, Dejian Zhou
Available Online March 2016.
- https://doi.org/10.2991/icmmct-16.2016.112How to use a DOI?
- OPCB; J integral; Crack expand; Random vibration
- For the reliability problem of the 90 Â° bend optical fiber embedded FR4 substrate in the bad service environment especially for military, the easily failure area of this modal under environments of random vibration and characteristics of interface cracks extending are researched. Firstly, modal analysis is conducted by ANSYS, to confirm the factors affecting the natural frequency of the base board, and to find the natural frequency in the status of the minimum bending loss. Combined with Military standard electronic products environmental stress screening method (GJB1032-90), the random vibration tests are conducted. Then, the stress distribution is treated as boundary conditions to calculate J integral. Ultimately, the results of calculating shows that under frequency between 440.45 and 440.45Hz, the minimum bending loss model prone to resonance; when the crack length is greater than 0.094mm, crack began to expand, and lead to low stress brittle fracture; crack growth and the J integral are linear positive correlation, so was the crack growth rate and the KI.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Wei Li AU - Dejian Zhou PY - 2016/03 DA - 2016/03 TI - Crack extension research of FR4 substrate embedded 90Â°bend optical fiber under the random vibration BT - Proceedings of the 2016 4th International Conference on Machinery, Materials and Computing Technology PB - Atlantis Press SP - 556 EP - 560 SN - 2352-5401 UR - https://doi.org/10.2991/icmmct-16.2016.112 DO - https://doi.org/10.2991/icmmct-16.2016.112 ID - Li2016/03 ER -