Assignment_1

Assignment_1 - MAE157 Lightweight structures (Winter 09)...

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

View Full Document Right Arrow Icon
1 MAE157 – Lightweight structures (Winter 09) Homework Assignment #1 Due in the drop box by 1pm on Friday, January 23, 2009 Solve the five following problems. For each problem, provide a detailed explanation of all the steps involved. Problem 1 The two trusses of Fig. 2 ((a) and (b)) are subject to the same external loads. For both, a=15cm, F=1000N and all the members have circular cross-section, with diameter, d=7mm . All members of both trusses are made of an Aluminum alloy, with yield strength ! Y = 300 MPa (assumed the same in tension and compression) and Young’s modulus, E = 70 GPa . Calculate the internal forces in the members and check whether trusses (a) and (b) are able to resist the applied load without yielding or buckling. [ Ans : Truss (a) fails by buckling; truss (b) resists] Problem 2 Fig. 4 is a unit-cell of a plane truss composed of two families of members (denoted 1 and 2 in the figure). It is loaded in a biaxial state, through identical forces F=10N
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 03/10/2009 for the course MAE 157 taught by Professor Valdevit during the Winter '08 term at UC Irvine.

Page1 / 3

Assignment_1 - MAE157 Lightweight structures (Winter 09)...

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