Question

Question 1: A step round bar as shown is subjected to two concentrated axial loads Fa at the section B and Fc at the section C. The material is a ductile material with yield strength Sy and young's modulus E The design control of this component is total actual length Lac. The diameters in the section AB and BC are dAB, and dac. The lengths of the section AB and BC are LAB and LBc. The factor of stress concentration at the section B is: kr N(1.79,0.09). (a) Create the limit state function for the strength and the defection issue. (b) Calculate the reliability of the component with Sy N(61000,5000) (psi) (c) If the design requirement of the bar is the total length LaB is less than 4.77", calculate the reliability of the bar with following information: Fa = 2000 ± 100(lb): Fc = 1500 ±80(1b); LAB?2.5±0.010; LBc 2.25+0.010; dAB .500 t0.005; dBC 0.375+0.005; E N(29 × 106, 5.8 x 105); A. (Notes: Create two programs. One for strength, one for deflection issue.) FB Fc

Answer 1

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