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Hi Tom, I am trying to make a test protocol for plastic part assembly subjected to thermal cycling. This is to mimic 250 sterlization cycles the product will go through. I was planning to use Coffin Manson equation for accelertion factor calcs and was curious on 2 things, one is the right model for an assembly mainly made out PEEK(plastic) and some stainless steel parts. Second, what value for the co-efficient should I use for plastics, I cannot find it anywhere. Also is there any book you can recommend for plastics reliability testing. Thanks

Have an interview next week and one of the requirements was knowledge of MIL-STD-810. "Brushing up" with these videos. Thank you!

why in last random vibration "psd vs frequency" graph for +3dB/octave the Grms became twice at 40 Hz ?? as per you, G should get double at 80 Hz as +6dB/octave means doubling the amplitude (as per your dB chart)

Amazing videos with nice examples and really helpful for interview preparation

Hi ,thank you for your support. Can I get a free book on automotive environmental testing?

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Tom. No offense, but this would be much better without you on screen, very distracting with your arm movements and without the fake energy. It's a really good video that's very helpful. Just do a voice-over video and quieten down.

Is there an equation to test each object according to the nature surrounding it?

Copied from a site that produces PC/104 cards: With in-house shock and vibe equipment, every design is tested and retested to a minimum of MIL-STD-202 for operation under shock and vibration. Does the 810 test series supercede this 202 test? 19:33 I guess it does. points 14, 23 an 27.

Sir: Is there a specific rule for salt spray test in accelerated mode, please guide

Is there some way or law to speed up the sun test time?

Can you answer my previous questions, Mr. Tom?

Regarding the dust and sunlight tests, can you tell us how to apply the acceleration test to them... Thank you very much, our esteemed professor.

Annoying how to talk

Q1: Is there anything that will change in the equations when testing one material against another, such as plastic, aluminum, etc.? Q2: If, for example, I find from the equations that the life acceleration test is 3 months versus 10 years, can I apply these 3 months intermittently? Due to a power outage to the simulator, would this be harmful? Finally, I would like to thank you personally for the interest you are sharing. Thank you very much...great job

How to estimate product testing for a specified number of years. For example, testing an electronic device exposed to nature for a year and how to simulate it for a shorter period.

I agree that you cannot prioritize by RPN alone, but your example was poor. If your Sev=10 and your Occur=10, your Det could NOT = 1. The only way you can give a Detection value of 1 or 2 is if you have a Poke Yoke or some type of error proof in place where 1 equals "you cannot MAKE" the feature bad, or a detection value of 2 where "you cannot PASS a part with that feature being bad". So, this could never happen. You should simply say that all Severities equaling 10 should be addressed.

I love the key takeaways! As a QE I feel like the sob that uncovers the issues between engineering and production because there was no communication between the two.

Very Good Information

Tom, Can you provide a source or reference for that AF equation your using? Enjoy your vids. Thx

Very good explanation

Do we have to switch ON the unit entire duration of the test?

can you explain what qualification is? and how it is different from verification or validation?

Does the intro really have to be that long?

Good explanation 👍🏻

Tom thanks for video. Would be much better if showed more zoomed in and no empty columns as I’m trying to view on phone. Best regards! Lamar

hi Tom , for the rock tumbler test for mobile phones , do you have some specs ? for how long test should run ? what is acceptable for a mobile phone to look like after the test ? thanks Chris

what is the testing standards for iphone?

Ouch, I can't even finish this video. My ears are bleeding!

An equipment which will be kept in an controlled environment (+25 to +30 degree Celsius) under cold weather upto -30 degrees Celsius. Hence, If there is no current, the temperature may fluctuate from +30 to -30 degree celcius. The life accorded will be 10 years. How to decide the thermal shock test conditions

No one believes in this reliability math nonsense!

Thank you for this video and the resources!

Thanks! Excellent

Nice! Are there more videos??

nice

Literally- the best.

You are my favorite reliability guy

Hi how about electronics equipment , as environment temperature not change so quickly. If temperature change is 3*C /hr , is it required that?

are accelerometers good to detect tremors in Alzheimer's patients instead of using piezos?

In the Random Vibration Accerelated Testing, is "a" the Fatigue strength at a specific stress cycle count? How does one determine "a" if a material and number of stress cycles is known? Seems a little washy to describe a factor in an expression as a "representative constant from a curve"... Is "a" a specific factor in the S-N curve or the result of the S-N curve or something else?

Thank you Tom. Can you create a video on how to derive random vibration profile from a acceleration time history data. 👍

How do you calculate the drop and tumble test to the life and stress relationship?

Fantastic job Tom! I was struggling a bit with understanding the testing part of the V curve before watching your video, loved the clarity of the concepts and your energy. Thank you.

I need all in detail videos on each topic please do it... Its very nice

Thanks you

21/12, huh? Rush fan or Mayan calendar enthusiast? xD

Great video. You can just slighly slow down your pace. Time to grasp :)

Hi Tom, Your video is excellent. we liked it very much. Kudos from the Indian Engineering community

You're awesome man, thank you!

What is this dance with the hands he does all the time? It seems he is trying to hypnotize the viewer...