Wikispeed Crash Testing Results
Marcin
Joe,
Do you have any more avi's outside of the side crash testing CAE?
Questions, also documented on wiki:
1. http://www.wikispeed.com/safe states 'Penetration in Inches'. Where are the numbers?
2. Re above question, what is the meaning of the scale in the bottom right picture (goes up to 265k)?
3. Do you have any other saved AVIs of the frame cae analyisis?
4. What are the dimensions of the test load if somebody is to redo the simulation? How does one interpret the results if the ideal load is rectilinear and real load is not?
5. How do we access crash testing documentation from your Wikispeed crash testing? Is there a report that we can publish?
6. Where do I find the specifications of the crash tests required (ie, FEA specs that we are trying to impose for analysis analize)? I'd like to do this in my ample spare time while I unicycle on the ridge beam of my new CEB house.
Thanks.
Joe
6) Here are the crash test standards for registered automotive manufacturers of road legal automobiles in the United States. Note that some cars on the road today obtain waivers to bypass these, such as the Lotus Elise and Lotus Exige and some Ferrari's. Also, these do not have to be met by cars in which the owners install their own engines and self-register. But registered automotive manufacturer's, like WIKISPEED, do need to meet these: http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?sid=d087e1aed0e079699e120ffe0e38312e&c=ecfr&tpl=/ecfrbrowse/Title49/49tab_02.tpl
5) Data from FEA and crash testing such that a report could be published: Please see attached: WIKISPEED_2nd_Deliverable_PDF_ATTATCHMENT.pdf. Note we were told by the X Prize regents that out of all 136 cars, we were the ONLY team to submit FEA impact simulation data.
4) Data to redo simulation: All FEA source files are published here: Dropbox\WIKISPEED\Evidence. New FEA source files can be generated using any crash testing correlated FEA program using the CAD published here: http://opensourceecology.org/wiki/Wikispeed_SGT01, and then modelling the impacts described here: http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?sid=d087e1aed0e079699e120ffe0e38312e&c=ecfr&tpl=/ecfrbrowse/Title49/49tab_02.tpl
3) Video files of FEA or physical and simulated crash testing: Dropbox\WIKISPEED\Evidence\Safety\FEA_Safety\wikispeed_AMPSTECH_FEA_Source_Files_and_Solutions.zip. Notes: 40% offset frontal crash test: frontal crush structure performance meets expectations. Interior module welds failed. Evolution- switched from MIG to TIG welding, added braces to Interior module seat mounts. Side impact test: cabin penetrated. Evolution: re-added side impact crush structures using similar design to front crush structure.
2) Scale of particular FEA still-frames: See answer to Q#5, this is the most information retained from AMPSTECH FEA.
1) How much penetration, in inches, was experienced during physical impact testing: 40% offset frontal impact test, no penetration in inches as per slow motion videography of impact event. Side impact test, approximately 4" inches of penetration as per slow motion videography. Side impact crush structures have been added based on this feedback to eliminate issue, modeled after crush structure used on front of car which performed well in 40% offset frontal test. Each test can be repeated at the cost of a car delivered to CAPE + $10,000.00 USD per test, as per CAPE test laboratory (Westfield, IN, USA).
Note all FEA and physical testing is conducted without an aeroshell, which absorbs energy and further increases safety, so that any aeroshell may be used as the frame itself is designed to current safety regulations. With the aeroshell on, the vehicle is expected to experience even less energy and load in an impact event.
Any additional safety information that we can acquire from the interested global community is absolutely paramount, as safety is the first priority, then efficiency balanced with cost and complexity, then convenience and comfort. The best case scenario would be for someone to find a safety flaw in the WIKISPEED designs, as then we could address it.
Joe
Who would like to take this data dump and collate it into a report that meets academic standards that we can publish? I would very much appreciate it. Also, I would like a benefactor to provide an additional $20k USD so that we can repeat the offset frontal impact and side impact tests with our revised interior module and side impact crush structures to validate our remedies from our first round of physical impact testing paid for by the DOE via the X Prize.
