This preview shows page 1. Sign up to view the full content.
Unformatted text preview: budynas_SM_ch06.qxd 11/29/2006 17:41 FIRST PAGES Page 177 177 Chapter 6 ¯
Sa = Se = 29.6 kpsi
z=− =− ¯¯
ln ( Sa /σa ) 2
1 + Cσ 2
1 + CS 2
ln 1 + Cσ 1 + C S ln ( 29.6/12.48) ( 1 + 0.102 ) /(1 + 0.1952 )
ln (1 + 0.102 )(1 + 0.1952 ) = −3.9 From Table A-20
p f = 4.481(10−5 )
R = 1 − 4.481(10−5 ) = 0.999 955 Ans.
(b) All computer programs will differ in detail.
6-40 Each computer program will differ in detail. When the programs are working, the experi¯
ence should reinforce that the decision regarding n f is independent of mean values of
strength, stress or associated geometry. The reliability goal can be realized by noting the
impact of all those a priori decisions. 6-41 Such subprograms allow a simple call when the information is needed. The calling program is often named an executive routine (executives tend to delegate chores to others and
only want the answers). 6-42 This task is similar to Prob. 6-41. 6-43 Again, a similar task. 6-44 The results of Probs. 6-41 to 6-44 will be the basis of a class computer aid for fatigue problems. The codes should be made available to the class through the library of the computer
network or main frame available to your students. 6-45 Peterson’s notch sensitivity q has very little statistical basis. This subroutine can be used to
show the variation in q , which is not apparent to those who embrace a deterministic q . 6-46 An additional program which is useful. ...
View Full Document
This note was uploaded on 12/13/2011 for the course EML 3013 taught by Professor Shingley during the Fall '11 term at UNF.
- Fall '11