ABSTRACT
MechanicalEngineers,Vol.172,1958,pp.727-742. 3.R.J.Roark,FormulasforStressandStrain,FourthEdition,McGraw-Hill,NewYork,1965,pp.
96-98,155-157. 4.S.Timoshenko,StrengthofMaterials,PartI,ElementaryTheoryandProblems,ThirdEdition,D.
MechanicalEngineers,Vol.172,1958,pp.727-742. 3.R.J.Roark,FormulasforStressandStrain,FourthEdition,McGraw-Hill,NewYork,1965,pp.
96-98,155-157. 4.S.Timoshenko,StrengthofMaterials,PartI,ElementaryTheoryandProblems,ThirdEdition,D.