Answered: Tmak=10 kNm Tmin= 3 kNm Pmin= 0 Timin=…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The LPG tank with an inner diameter of 420 mm and a wall thickness of 2.2 mm in the figure operates under an internal pressure ranging from zero to 3.2 MPa. Also, an axially variable torsional moment of Tmax=10 kNm and Tmin=3 kNm is applied to the tank. The tank made of hot rolled steel sheet operates at ambient temperature. Accordingly, calculate the fatigue safety of the tank for 50% reliability? (yield strenght=460 Mpa,tensile strenght=520 Mpa)

Note=Since there is no notch effect in the cylindrical part of the tank, take all kf as 1. For 50% reliability, take kc = Axial * Torsion = 0.51. Take the size factor kb = 0.85.

Tmak=10 kNm
Tmin=3 kNm
Pmin= 0
Tmin= 3 kNm
Tmak=10 kNm

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