Questions tagged [product-testing]

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2
votes
1answer
59 views

Identification of bolt material

Background: The CS bolts are available with Black Oxide coating. I have read that the coating is applied using hot dipping and cold dipping methods. Also that hot dipped coating is more durable than ...
3
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2answers
26 views

What ASTM standard would be appropriate for testing the breaking strength of nylon ropes

ASTM D4268-93 would appear to be the relevant testing standard, but this was withdrawn in 2002 and is no longer active. Is there a current standard?
1
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1answer
34 views

Why use a reference volume for leak testing?

An accepted method of leak testing a test piece is by using a differential measurement between it and a reference such as in the schematic here - why might one bother doing this as opposed to just ...
1
vote
0answers
27 views

Solar Radiation Environmental Test Duration

I am designing an outdoor sensor and I need to test it for continuous outdoors service. One of the test I wish to perform is a solar radiation test for the actinic effect (like procedure 2 in MIL-STD-...
2
votes
3answers
205 views

DOE analysis or root cause analysis?

For any testing that a part is suppose to pass a test, let's say the leakage test of a seal flange. How should I individualize the cause? I know there is root cause analysis and for different ...
0
votes
1answer
21 views

Emulate impact forces using pneumatic piston

I am trying to test a piece of furniture based on a particular code, the code states that i can either drop a bag (with a specific shape) of 57 kg 1.2 in above the seat or I can use other methods as ...
1
vote
1answer
91 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 ...
-1
votes
1answer
174 views

Must MSA (Measurement System Analysis) be re-performed after annual instrument calibration?

I'm working in an automotive company that must follow IATF (International Automotive Task Force) requirements. I administrate a test-bench that performs RF (radio frequency) tests using an ...
0
votes
1answer
246 views

How can I measure the coefficients of friction of pulleys?

I have to study several industrial pulleys made for lifting heavy weights. It is important to select one which has a low coefficient of friction because the system is based in a hoist and several ...
2
votes
1answer
132 views

How should the assignment to test software for a vehicle’s VCU be aproached?

As a graduation project, I was assigned to solve the following problem: How can the vehicle’s behaviour be simulated in the form of a testing programme, with which the VCU software can be fully ...
3
votes
2answers
229 views

How to resolve file space issue on CDAQ Controller with Labview Test System?

Question: I am currently encountering Hard Drive Memory space issue to store file on a National Instruments based CDAQ Tester. I am using Labview 2013 SP1 and have to all the software load in the ...
-1
votes
1answer
26 views

Backplane connector adapter

I have a backplane. A backplane is a PCB which more or less serves as a hub for other PCBs. The other PCBs connect to it through its "backplane connectors" and it routes the numerous quantity of ...
0
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0answers
34 views

Long term deflection

I've been working with a team of 'designers' that are highly concerned over a potential failure mode of ABS plastic. Their theory is that under a static load well under the yield point of the material ...
2
votes
2answers
2k views

How to cut Silicone and leave smooth edges?

We've got drawings for a prototype that we're trying to mimic by altering an original mold of the product. For us to mold it would be quite expensive to just test it to see if it works or not. We're ...
0
votes
1answer
30 views

How can I determine pressure leakage in a pneumatic system?

I am an engineer currently designing a system in which the leakage of a hose is tested. The system consists of the following components: An air data system used to generate a pressure inside the hose....
5
votes
3answers
3k views

Test UV protection on sunglasses

I bought sunglasses in China that claims to have UV400 protection. I'd like to test this as my eyes' health is on the line :) Is there any way to check the maximum UV amount these glasses can protect ...
0
votes
2answers
166 views

Short sample in a 4-point bending test ( ASTM C 393 )

I would load a sample measuring 130 mm long in the 4-point bending test (ASTM C393) According to the standard, the sample should be 150 mm long. Top layers consist of laminates (laminates are Fiber-...
0
votes
1answer
40 views

Validation of Lightweight Chassis (measuring deflection of structures/strain gauging)

How can we validate the structural integrity of a small lightweight chassis manufactured from 6063-T6 aluminium that has been welded and then heat treated (back to t6 condition)? A simple FEA model ...
1
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0answers
20 views

Designing a good downscaled compaction test

When storing a large amount of polymer material, afterwards we are experiencing bad flow properties during processing. We expect it is due to storing the material for long periods of time at high ...
4
votes
1answer
262 views

Why does tensile testing in thin films (ASTM D882) require a non-dogboned sample?

The ASTM dicates a plain rectangular shape. I understand that the material necks pretty quickly but I frequently get breaks in the grips, particularly with films of thickness less than 0.002." Dog ...
0
votes
1answer
68 views

Gear testing rig

I have two bevel small (POM) gears that I'd like to test. I'm hoping to test their strength and their maximum torque. One is 15-tooth and is around 16MM wide and the other is 45-tooth and is around ...
5
votes
3answers
1k views

What level of vibration testing should I perform on my product?

I'm trying to determine a level of vibration testing I should perform on my product. I understand electrical stress/life testing and I'm looking for a mechanical equivalent. I have a DC motor running ...
48
votes
2answers
9k views

How was Volkswagen able to trick the lab pollution test?

The recent Volkswagen pollution test cheating scandal has shocked many people with its widespread extent as well as how it was hidden for so many years. Last year, the International Council on ...
7
votes
1answer
61 views

What is a method to detect thermal oxide layer after steel is painted?

Is there a method to test for thermal oxide on a painted steel part after the paint has cured? I'd rather the method be nondestructive but it only being destructive in the presence of thermal oxide ...
4
votes
2answers
91 views

How can I better structure documentation for a quality control process?

In my organization, every unit is built by hand, and every unit is tested. Every product has a written construction procedure and a written test procedure. We're in the process of updating and ...
12
votes
4answers
767 views

Is interference between aircraft an issue for fly-by-wireless technology?

I was reading up on fly-by-wire development, and I saw a short section about fly-by-wireless technology. It seems like a great idea, with the potential to lower costs, weight and complexity. I can see ...
7
votes
2answers
2k 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 ...
4
votes
1answer
456 views

LabView or another software for experiments [closed]

I used LabView for a lot of my BME undergrad, but the labs focused mainly on things dealing electrical signals. In the real world I'm working mostly on ME projects, but we lack a good deal of ...
4
votes
1answer
257 views

How can I efficiently find the root cause of validation failures?

Within most engineering development processes, product testing and validation is an integral part of the product development process. All prototype / engineering development samples are tested. And ...