Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
DEPARTMENT OF MECHANICAL ENGINEERING CAMBRIDGE, MASSACHUSETTS 02139 2.002 MECHANICS AND MATERIALS II EXAMPLE PROBLEM IN FRACTURE Distributed : Wednesday, April 7, 2004 A spherical thin-walled pressure vessel is to be fabricated from formed plates. The capacity of the vessel is to be 14 m 3 , and the fluid it contains will be under a peak internal pressure of 50 MPa . You may use the standard stress analysis of thin-walled spherical pressure vessels to relate stress to pressure and vessel geometry. Three grades of mar-ageing steel are under consideration for constructing the vessel. The table gives the tensile yield strength ( σ y ) and fracture toughness ( K Ic ) of each grade. Each of the steels has mass density ρ = 7 . 8 Mg/m 3 . Grade σ y (MPa) K Ic (MPa m ) 200 1482 111 250 1690 94 300 2000 66 You are to specify the material and corresponding wall thickness so that the structure will 1. be of least weight , while 2. retaining a factor of safety of at least 2 against both (a) yielding and (b) brittle fracture. 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/23/2012 for the course MECHANICAL 2.002 taught by Professor Davidparks during the Spring '04 term at MIT.

Page1 / 2


This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online