"Hello Ian,
Thanks a lot. :)
I'll remind my colleague in China about this thickness issue. We would most probably test this chair as soon as it finished to confirm BIFMA standards.
Good luck with the project. :) I really look…"
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Rendy Himawan
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Office Chair Analysis
10 Replies
Hello, I need Your feedback about correct methods on chair testing. I have no experience with CAD analysis and simulation before. …Continue
Tags: Test, Force, Scalar, Chair, Office
Started this discussion. Last reply by skyma Mar 27.
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Ian Boyd replied to Rendy Himawan's discussion 'Office Chair Analysis'
"Hi Rendy
The prototype looking good!
8mm steel for back - no problem - if you run into difficulty with BIFMA look at moving to something like SAE1010 alloy (used by the auto industry for the same reason).
The problem with people who approve things…"
Rendy Himawan replied to Rendy Himawan's discussion 'Office Chair Analysis'
"Hi Ian,
I am very sorry for late replying. I am waiting for our prototype. :) Should see it here: http://rendyhimawan.com/post/13157411558/prototyping
We have experimented with ergonomics before by using steel frame for "comfort…"
Ian Boyd replied to Rendy Himawan's discussion 'Office Chair Analysis'
"Hi Rendy
(Sorry for taking so long to reply... a bit hectic here). It's a good thing to be testing with SnS now but there is still some road to travel. I am making the assumption you are serious about going into production.
I have…"
Rendy Himawan replied to Rendy Himawan's discussion 'Office Chair Analysis'
"Hi Ian,
Thanks for the tips. :)
Your extensive knowledge and experience would be very helpful for me.
Unfortunately, we don't have such experience in plastic design. There are some critical points from your note:
I…"
Ian Boyd replied to Rendy Himawan's discussion 'Office Chair Analysis'
"Hi Rendy
For the US standard on chairs you need to look up Ansi-BIFMA, X5.1 (backrest overload test, see attached). This is also pretty much a global standard.
The BIFMA load criteria (406mm from seat, etc) will probably not match…"
Rendy Himawan replied to Rendy Himawan's discussion 'Office Chair Analysis'
"Michael,
Thanks. I think in this case, it should be correct to assume forces are distributed proportionally in surface area.
We would have this design manufactured very soon. :)
By the way, do You also provide printer friendly…"
Michael Freytag replied to Rendy Himawan's discussion 'Office Chair Analysis'
"Rendy,
If you do not select the per face checkbox in the Boundary Load Creator dialog then the load you apply is distributed among the selected faces in proportion to their areas. For more details, see the updated documentation.
I'm…"
Rendy Himawan replied to Rendy Himawan's discussion 'Office Chair Analysis'
"Hi Michael,
It does, thanks. :)
It should be a pushing force on y direction.
I was not aware of vector component (x, y, z) when applying certain force. I have updated applied force at sides and top of the backrest.…"
Michael Freytag replied to Rendy Himawan's discussion 'Office Chair Analysis'
"Rendy,
The .html reports seem to have not come through with formatting or images since these files are external to the html report itself.
I will attempt to comment based on the images included in your post.
In Scan&Solve a scalar force acts…"
Rendy Himawan posted a discussion
Office Chair Analysis
Hello, I need Your feedback about correct methods on chair testing. I have no experience with CAD analysis and simulation before. I have scanned and solved the backrest (blue part), and need Your help to see whether my analysis was correct or not (attached report in .html):The restrained part (1) and loaded area (2)…See More
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- What modeling, simulation and analysis tools do you use?
- Rhinoceros with T-Splines. Novice experience with simulation and analysis.
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