mfg Posted December 31, 2016 Report Posted December 31, 2016 The torsional rigidity of the Avanti's fiberglass body mounted onto its 'X' member frame is ----?-----ft/lb degree of twist.............1) 500-1200.......2) 2500-3000.......3) 3800-4200....or...4) 5000-5500.
studegary Posted January 28, 2017 Report Posted January 28, 2017 19 hours ago, mfg said: All through here? I believe that you mean to say; ---ft-lbs per degree of twist.
mfg Posted January 28, 2017 Author Report Posted January 28, 2017 7 minutes ago, studegary said: I believe that you mean to say; ---ft-lbs per degree of twist. That's correct Gary, PER degree of twist!
r1lark Posted January 29, 2017 Report Posted January 29, 2017 Well, I was too lazy to run the calculations but since no one else answered.................. Taking into account the tensile modulus of elasticity of FRP, the frame rail design and gage, the x-member, etc, a quickie estimate is around 4000 ft-lbs/deg of twist. So I'll say the answer is 3) 3800 - 4200.
mfg Posted January 29, 2017 Author Report Posted January 29, 2017 2 hours ago, r1lark said: Well, I was too lazy to run the calculations but since no one else answered.................. Taking into account the tensile modulus of elasticity of FRP, the frame rail design and gage, the x-member, etc, a quickie estimate is around 4000 ft-lbs/deg of twist. So I'll say the answer is 3) 3800 - 4200. Holy cow!..I didn't realize ALBERT EINSTEIN was still alive!!.....You are CORRECT!!
r1lark Posted January 30, 2017 Report Posted January 30, 2017 Well Ed, at least this mechanical engineering degree is useful for something. But seriously, I didn't calculate that, just made use of reference material. In this case, the SAE paper on the Avanti.
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