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Jim Shaw, EVP of Engineering at Crystal Group, discusses MIL-STD-810 Method 513.6 Testing.

MIL-STD-810 Test Method 513.6 Acceleration

Hi, Jim Shaw here from Crystal Group. We’re doing a little bit more of our deep dive down into MIL-STD-810 and today we’re talking about acceleration which is really method 513. And so what is that about? In essence, acceleration is talking about sustaining loads to your box or your structure, whatever the case may be. And so in acceleration you’re looking for things like permanent damage, deflection, there are some tests or procedures that require acceleration while the box is operating and some are just essentially structural in nature, did it break?

The best way to think about acceleration is when you’re at space training and the astronauts are going around and around in that G4 simulator. That’s pretty much exactly what acceleration is like, although this is one of the cooler specs because they actually talk about rocket sleds on rails. So that’s a little bit different type of an application. But for us here at Crystal Group acceleration is about sustained loading and it’s essentially, structurally can the box withstand the G loads? There’s three procedures, there’s an operational procedure, there’s a structural procedure here and then there’s crash loading.

So for the operational testing, you’re asking does it work during the test? For the structural, you’re looking for did anything break? And for crash safety, would the unit be safely contained in its mounting structure during a crash? And those are the things that you’re really focusing on in this test. It generally is three mutually exclusive axis or three mutually perpendicular axis. Like I said it’s anywhere from a half G to twelve G’s or 3 G’s to 40 G’s depending on whether you’re operational, structural or crash safety.

And all of this you’re looking for are things reflecting? Are circuit boards changing shape and shorting out? Are you having any fatigue damage, or not fatigue, but actual structural damage of the system so that you have a problem with the box? And so these are the things that you’re looking for is really structural integrity, can it withstand the loads? Basically how sound is the box in the application? So that’s a little bit about method 513. Thanks a lot.

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