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Questions tagged [product-testing]

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51 votes
2 answers
10k 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 ...
March Ho's user avatar
  • 1,178
12 votes
4 answers
859 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 ...
HDE 226868's user avatar
  • 2,475
7 votes
2 answers
3k 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 ...
Stephen Collings's user avatar
7 votes
1 answer
85 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 ...
Acumen Simulator's user avatar
6 votes
3 answers
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 ...
dotixx's user avatar
  • 163
5 votes
3 answers
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 ...
Captain Barnacles's user avatar
5 votes
1 answer
496 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 ...
William B.'s user avatar
4 votes
1 answer
376 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 ...
Sully45's user avatar
  • 69
4 votes
2 answers
102 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 ...
Stephen Collings's user avatar
3 votes
2 answers
336 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 ...
Mahendra Gunawardena's user avatar
3 votes
1 answer
278 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 ...
Mahendra Gunawardena's user avatar
3 votes
2 answers
183 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?
user8908459's user avatar
2 votes
3 answers
702 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 ...
FabioSpaghetti's user avatar
2 votes
1 answer
68 views

Testing specimens by dropping a ball on them and counting the number of drops required before the collapse. A better way?

A huge number of specimens are built. For each specimen, soil is mixed with cement (and Zeolite) with different percentages. It's intended to test, measure and compare the impact strength of the ...
Megidd's user avatar
  • 151
2 votes
1 answer
162 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 ...
Bart's user avatar
  • 1,184
2 votes
3 answers
13k 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 ...
M Purry's user avatar
  • 21
1 vote
1 answer
75 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 ...
new2Ubuntu's user avatar
1 vote
1 answer
66 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 ...
Oliver Walters's user avatar
1 vote
1 answer
146 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 ...
Luke Thomas's user avatar
1 vote
0 answers
35 views

Validation vs verification in mechanical engineering

I'm confused about what the difference between Validation and verification is in a mechanical engineering context please? Also, where in the engineering life cycle/design process are these steps? What ...
WarwixkD's user avatar
1 vote
0 answers
36 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-...
Eli's user avatar
  • 19
1 vote
0 answers
23 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 ...
nluigi's user avatar
  • 202
0 votes
1 answer
73 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 ...
John M.'s user avatar
  • 1,033
0 votes
1 answer
23 views

Is it possible to conduct a completely random Quality Test?

I work in the aerospace industry and would like to utilize simple, mass market COTS assemblies as critical components. Let's assume it's a simple solenoid valve. Rather than create a contract or ...
Jee's user avatar
  • 101
0 votes
1 answer
46 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....
Snoop's user avatar
  • 101
0 votes
2 answers
213 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-...
Zouhir Bensebban's user avatar
0 votes
2 answers
45 views

Is It Possible To Calculate The Internal Pressure Which A Sealed Glass Vessel Can Support, By Creating A Relative Vacuum Outside The Vessel?

Questions are bold with context surrounding them. I am not an engineer. Well, I'm a computer scientist but I don't do this. I do, however, brew kombucha and am looking to scale up. I have a new ...
Matthew Jendrasiak's user avatar
0 votes
1 answer
176 views

C# classes through labVIEW?

I haven't worked a lot in labview, but I know we write c# class libraries to help our labview testing. I am writing some hardware testing through a c# class library project where I am using interfaces ...
Grant Dare's user avatar
0 votes
1 answer
53 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 ...
massey95's user avatar
0 votes
0 answers
19 views

Shaped charges and fluid dynamics

Watching this video https://twitter.com/Rainmaker1973/status/1713599092968787987 of objects being dropped into water and the resultant shape of the displaced fluid reminded me of videos showing how ...
Peter's user avatar
  • 101
0 votes
0 answers
15 views

How to test a Wi-Fi device

Usually, when testing a communication protocol, (for example emotion tests for TUV or CE) I use a test setup suggested by the standard organization. I am looking for a similar test procedure for ...
ofer's user avatar
  • 1
0 votes
1 answer
33 views

the low sensitivity of a dome mounted tweeter in sound testing

What is the common reason and how to solve the low sensitivity of a dome mounted tweeter in sound testing? The testing software is a Soundcheck dome tweeter, and the sensitivity of sound testing is ...
yayyayyay's user avatar
0 votes
0 answers
20 views

How do you exclude the connections between mechanical shaker and specimen?

to apply any kind of vibration, shock input using a mechanical shaker to any specimen, you first need to connect the speciment to the shaker, that sometimes needs some connectors that could weight as ...
FabioSpaghetti's user avatar
0 votes
0 answers
30 views

How to get my product IEC tested and certified

What is the procedure to get proper IEC certification for a product? What is cost of such action? I am talking about, let's say, a fan or an oven (if size and complexity of product makes any ...
Name's user avatar
  • 31
0 votes
1 answer
74 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 ...
JC ME's user avatar
  • 170
0 votes
1 answer
821 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 ...
Andrea's user avatar
  • 111
0 votes
0 answers
107 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 ...
Diesel's user avatar
  • 622
0 votes
1 answer
650 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 ...
user6131's user avatar
-1 votes
1 answer
30 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 ...
kando's user avatar
  • 99