Sunday, September 20, 2009

CHASSIS sTrEnGtH aNaLySiS on ANSYS !!!








3 g force=1652 lbf (3g is greater than required but for to be on the safer side
we choose 3g; 3g means 3 times the total weight of
the vehicle including the human weight)
1 pound force/square inch=6895 Pascal
in case of frontal impact,max stress=51863 pound force /square inch=357.59 MPa
This exceeds the yield stress of mild steel which is 250 MPa.
Hence, we provide an assembly of cross bars to further enhance the strength. After providing cross-bars, stress level reduces from 214mpa to 181.76mpa

factor of safetey from 1.16 to 1.5, which in simple terms, wow!!!
So we have virtually built the chassis and analyzed its strength and come to the conclusion that by providing adequate number of cross members at appropriate places, we can control the stress to be resisted by the frame, well below the failure stress...

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