________________________________________________________________________ PROBLEM (12.3) A cold-rolled bronze rod of cross-sectional area 12 in.2 is subjected to axial compression loading. If the allowable axial compressive stress is 14 ksi and E = 16 x 106 psi, calculate the minimum length of the rod required for a strain energy of U = 1.3 in.-kips to be stored in the rod. SOLUTION 2 ALmin P 2 L σ all = 2 AE 2E Solving 2 EU 2(16 × 106 )(1.3 × 103 ) Lmin = = 2 Aσ all 12(14 × 103 ) 2 = 17.687 in. U= Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes only to students enrolled in courses for which the textbook has been adopted. Any other reproduction or translation of this work beyond that permitted by Sections 107 or 108 of the 1976 United States Copyright Act without the permission of the copyright owner is unlawful.