Improvement of Burst Disk Testing Station

This project was funded by Autoliv, a com-pany that specializes in protecting automo-bile passengers. The focus of this project was to design an improvement to Autoliv’s burst disk testing station. Burst disks are thin disks of metal that need to rupture at a specific pressure in order for an automobile’s air bag system to deploy correctly. Before this pro-ject, Autoliv was using an oscillatory high-pressure pump to build and measure the burst pressure of these disks. The oscilla-tions of the pump caused spikes in the pres-sure that made obtaining an accurate burst pressure difficult. To add to this difficulty, the pump worked at only one speed. This speed was too fast and further complicated obtain-ing accurate measurements.

Our capstone team designed a new testing station that overcomes the problems associated with using an oscillatory pump to build pressure. Our design uses a pneumatic actuator to drive a hydraulic piston that is capable of generating pressures well above 20,000 psi in a single stroke. Complete control of air pressure applied to the pneumatic actuator al-lows burst tests to be performed as slowly or quickly as desired with an accuracy within 1 psi/sec.

Autoliv can now obtain more accurate and reliable information about their burst disks. This information is being used to improve airbag sys-tems and save lives. The test station designed at BYU gives Autoliv greater confidence in what they know about their burst disks.

School Year (term): 
Team Name: 
Burst Logic
Richard Gee
Team Members: 
Jon Mortensen, Phil Rindlisbach, David Grimm, David Page, Hayden Huss, George Smith

Brigham Young University - Provo | Ira A. Fulton College of Engineering and Technology | The Church of Jesus Christ of Latter-day Saints
Capstone Webmaster, Department of Mechanical Engineering, BYU, Provo, UT 84602 - (801) 422-3894 Address/Directions

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