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Questions tagged [shock]

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0
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2answers
40 views

shock absorbing rigid joint

There is this problem I can't figure out. One measurements wheel needs to be attached to a slowly moving but wildly shaking and twitching construction machinery. I am trying to greatly absorb the ...
0
votes
1answer
34 views

What height is needed to drop a 72 kg mass to impart a 5000g shock onto a test piece

I am trying to design a simple drop / shock testing machine. We want to rate our products to be shock rated to 5000g. In order to test our products to 5000g I plan on dropping a weight onto the ...
0
votes
1answer
32 views

Shock/Isolation mounting under tension

I want to secure a box (roughly 20kg in total) that contains electronic equipment to the underside of a flat steel structure. We can weld onto the underside. The steel structure has a high chance of ...
3
votes
1answer
566 views

Short circuit in welding

All I know about welding is it is a technique in which electrode is connected to one terminal and the gripper connected to workpiece is in connection with the other terminal. As current passes and ...
1
vote
1answer
36 views

Comparing 2 shock scenarios with different magnitudes and times

For example, How does one compare 100 g's for 6 milliseconds to 45 g's for 11 milliseconds. These are two different shock scenarios with different magnitudes and times, so how can I compare them? If I ...
1
vote
2answers
88 views

I want a shockproof table for a model train. That is, protection from physical jolts, not electrical volts

I have an N-scale model train (N-scale is about half the size of HO scale). It's so small I could set up an entire layout on something the size of a coffee table. Put a glass top over it and I could ...
1
vote
1answer
39 views

stress wave propogation in metals

Over years of flying small airplanes I have seen fatigue cracks and frayed brackets and connections. I wonder if there is an easy way to search the propagation of stress wave in machinery and ...
3
votes
2answers
222 views

Spring - Piston with different extension and compression rate

I am in need of a device that extends freely without much resistance but compresses slowly. I can provide a door closer analogy.The door should open fast but close slowly.... Do you think this can be ...
5
votes
1answer
2k views

Explanation of supersonic flow differences between a 2D wedge and a 3D cone

I know that in case of wedge we have a 2D behavior which creates a discontinuity across the shock, but I am unable to understand why this discontinuity is not present in the case of a conical surface. ...
7
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2answers
1k views

Are there standard vibration and shock specs for shipment of a product?

Suppose I want to ship my product via UPS, or whatever other professional carrier service. What vibration and shock forces should I design my product to withstand? And how can I effectively test my ...