TY - JOUR
AU1 - Wei, Liu
AU2 - Ren, Xiao-Ming
AU3 - Liu, Lan
AU4 - Chu, En-Yi
AU5 - Zhang, Hai-Ying
AB - A novel PyroMEMS safe and arm device (S&A) by using torsion spring to lock the slider are presented, and the S&A device is composed of an igniter layer, an actuation layer and a lid layer. Due to strength of the bearing beam determined the arming process of PyroMEMS S&A device, a simulation model was built by using commercial explicit dynamic software to calculate damage and fracture behaviour of the bearing beam. Critical sizes of the bearing beam were computed under different conditions. The results showed that damage behaviour between the normal and necked-shape bearing beams were quite different, and the double-beam structure could not realize the arming function compared to the single-beam structure. The critical fracture pressure increased from 62.5MPa ± 2.5Mpa to 102.5MPa ± 2.5Mpa, as the width of normal bearing beam increased from 100μm to 150μm. Only if the width of normal bearing beam was less than 149.4μm, or the angle β of necked-shape bearing beam was greater than 3.4°, the bearing beam could be broken to release the slider and furtherly realize the arming function. It is of vital importance to guide the design of PyroMEMS S&A device.
TI - Damage and Fracture Behaviour of Bearing Beam for the PyroMEMS Safe and Arming (S&A) Device
JF - Journal of Physics: Conference Series
DO - 10.1088/1742-6596/2891/13/132017
DA - 2024-12-01
UR - https://www.deepdyve.com/lp/iop-publishing/damage-and-fracture-behaviour-of-bearing-beam-for-the-pyromems-safe-L9wQcoSIKL
VL - 2891
IS - 13
DP - DeepDyve
ER -