Sketch the method to reduced stress concentration in cylindrical members with holes.

Sketch the method to reduced stress concentration in cylindrical members with holes.
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The methods of reducing stress concentration in cylindrical members with shoulders hole, subjected to tensile load. 

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It is the process of placing seeds in holes made in the seedbed and closing the seed with soil. In this method, seeds are placed in holes made at definite depth at fixed spacing. b. Drilling c. Broadcasting d. None of the above

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Wahl factor to account for direct shear stress and stress concentration due to curvature for helical springs is given by, (A) (4C - 1/4C - 4) + 0.615/C (B) (4C - 1/4C + 4) + 0.615/C (C) (4C + 1/4C - 4) + 0.615/C (D) (4C + 1/4C + 4) + 0.615/C

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For a helical torsion sprig, the stress concentration factor at outer fibre is? Give spring index=5. a) 0.78 b) 0.87 c) 1.87 d) 0.69

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Stress concentration is caused due to A. Variation in properties of material from point to point in a member B. Pitting at points or areas at which loads on a member are applied C. Abrupt change of section D. All of the above

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