The discussion revolves around calculating the maximum impact force that a bicycle helmet must withstand when subjected to a drop test. The original poster is exploring the dynamics of helmet design and impact testing, specifically in relation to a 5kg head model dropped from a height of 1.064m onto an anvil.
The conversation is ongoing, with participants providing insights into helmet testing standards and the nature of impact forces. Some participants have raised questions about the relationship between impact duration and helmet design, while the original poster is seeking clarity on how to proceed given their constraints.
The original poster indicates that they are not able to conduct physical experiments due to lack of conditions, which may affect the discussion on estimating impact forces. There is also a mention of the project being related to a design course rather than a traditional homework assignment.
Thanks for your reply.berkeman said:
Then the specific Wikipedia article on bicycle helmets (out of the full list of different helmets that I posted) should help: https://en.wikipedia.org/wiki/Bicycle_helmetJun said:
It's not homework. I am a student majoring in design, and I want to design a new helmet shape. I asked because I don't know much about engineering. I specified the duration of impact as 0.005 because I thought it is easier to answer if the conditions are clearly given.jrmichler said:
Per the PF rules, schoolwork projects should be posted in the Homework Help forums. I'll move your thread there now, leaving a redirect link behind in this technical forum.Jun said:
Withstand, as in remain undamaged? Helmets are designed to be damaged (plastic deformation) since that minimises the impulse transferred to the head as well making the force profile flatter.Jun said: