lab 5 - Analysis of Results Plate penetration: 1,2. Maximum...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Analysis of Results Plate penetration: 1,2. Maximum energy absorbed versus temperature for plates of PMMA (Blue) and ABS (Pink). Note: graph shows actual data points as well as the probable dependence of energy absorbed as a function of temperature. Maximum load versus temperature for plates of PMMA (Blue) and ABS (Pink). Note: graph shows actual data points as well as the probable dependence of maximum load as a function of temperature.
Background image of page 1

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

View Full DocumentRight Arrow Icon
Charpy impact: 3,4. Maximum energy absorbed versus temperature for Charpy specimens of steel 1045(Blue) and aluminum 6061(Pink). Note: graph shows actual data points as well as the extrapolated probable dependence of energy absorbed as a function of temperature. Fracture toughness: 1. λ = a w fffff , the value of the crack length ( a ) was 26.14mm and the value of the effective specimen length ( w ) was 50.91mm giving a λ value of 0.513 which corresponds to a geometry factor ( f (λ)) of roughly 10. 2. 0 2 4 6 8 10 12 14 16 18 0 0.1 0.2 0.3 0.4 0.5 0.6 Crack-opening displacement (mm) Load (kN) Load-displacement curve for aluminum 7075
Background image of page 2
Judging from the above graph, the critical load P Q is 15.2kN and the curve is a type II load-displacement curve because the curve slopes down after reaching the critical value and then curves back up to a maximum. 3. Using the equation K Q = P Q B w p wwwwwwwww ffffffffffffffffffff f λ ` a a provisional value of K Q can be calculated using a specimen length ( w ) of 50.91mm a specimen thickness ( B ) of 25.54mm a critical load ( P Q ) of 15.2kN and a value of f (λ) of 10. K Q = 26.4MPa*m 1/2 . Using a value of σ y of 500MPa for aluminum 7075 and a value of K Q of 26.4MPa*m 1/2 the following condition must be satisfied in order for
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This lab report was uploaded on 04/20/2008 for the course GE 312 taught by Professor Reis during the Spring '06 term at University of Illinois at Urbana–Champaign.

Page1 / 5

lab 5 - Analysis of Results Plate penetration: 1,2. Maximum...

This preview shows document pages 1 - 4. Sign up to view the full document.

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