Question

An M 14 2 hex-head bolt with a nut is used to clamp together two 11-mm steel plates. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine a suitable length for the bolt, rounded up to the nearest 5 mm. The length of the bolt L is mm. Determine the bolt stiffness. The bolt stiffness kb is! MN/m. Determine the material stiffness. The material stiffness km is MN/m.

Answer 1

Given M148 2 hex-head bolt thickness of two steel plates is 11 mm -14 mm 1 size 14 mm f nut H:12.8 mm table Dimensions of Hestogonal nuts for nominal Height of herogonal Crip length lg = plate thickness 22 mm areas of pitch and fine matric's thread for nominal diameter of Solution: Diameter bolt from Length of * Tensile stres ig nut ". the bolt, L = Grip length + height of he 22 + 12. f L = 34. 8 mm ". The Suitable length of the bet to the nearest sma is 16-35mm fee Thoraded length for metric Series for 15125mmy L = 20 + 6mm = (2x14) +G Ly = 34 mm area, = 115mm² from table diameter and 1mm. - Area of unthreaded portions I (14) 2 d T 4 4 A = 153. 86 mm² length of unthreaded portion in grip - L-LT = 35-34 ہوا 4- mm

Length of threaded portim in grip 4 = horlo 22-1 = 21 mm Youngls modules t to steel Bolt Stiffness ko 6 = 207 Gpa Ра А Е A 4 tal (153.86) (115) (207) (153.86X21) +(115) (1) MN ko = 1094. 612 ty Material stiffness is 0.5774 Ed 0.5774x22 +0.5X14) 0.5774 X22 +(8.5X14) 5X 0,5774 to X 207 814 2 dn (2.065) 5254. 17 f 1.45 3623.571. MN Thank You