-hh
On Monday, February 17, 2014 6:35:00 PM UTC-5, Alan Baker wrote:

Alan Baker
On 2014-02-17 23:28:52 +0000, Nashton said:

Nashton
On 02-13-14 8:17 PM, -hh wrote:

-hh
On Thursday, February 13, 2014 2:04:02 PM UTC-5, Alan Baker wrote:

Alan Baker
On 2014-02-13 18:18:44 +0000, David Fritzinger said:

David Fritzinger
In article <ldh1bf$bt0$1@dont-email.me>, Nashton <nonna@nana.ca>wrote:

Nashton
Fuck off.

David Fritzinger
Brilliant comeback, Nashton. If you were in grade school that is...

Alan Baker
Hey, hey, hey!

Nicolas is a university graduate... ...in physiotherapy... ...but apparently that makes him an expert at everything (including how a 20 year old car must be a death trap due to "metal fatigue"!).

Nashton
Advertising your ignorance again, I see.

-hh
Oh, I'm sorry: are you _denying_ that you ever said that about Alan's Miata?

Nashton
Of course, a low brow uneducated good-for-nothing-Mac-sucker would know nothing about something as well known as metal fatigue.

Alan Baker
I know quite a bit about it actually...

...and I know that car unit bodies made out of steel don't really> suffer from it.

-hh
Merely less so, as steel has traditionally been an oddball in that it commonly has 'true' asymptotic performance, which is generally very rare in other structural materials.

Alan Baker
Aluminum is quite a different matter and when the first jet airliners came along (in particular the British deHavilland Comet) there were> quite a few crashes before they figured out that aluminum can> fatigue... ...catastrophically.

-hh
FYI, there were some iron/steel railroad bridges which catastrophically failed in (IIRC half) cyclic loading at the turn of the 19th/20th century.

Alan Baker
But tell us all, Nicolas: what are the specific courses you've taken that have taught you so much about the subject.

:-)

-hh
You mean a list something like:

"ENGR 220 Fundamentals of Materials 4.0 Credits Introduces materials and their properties; atomic view and architecture of solids; atomic motion in solids, mechanical, magnetic, electrical and optical properties of materials. Corrosion and degradation of solids."

"MEM 230 Mechanics of Materials I 4.0 Credits Covers definitions of stress and strain, uniaxial loading, torsion, bending moments and shear forces in beams, bending stresses and shear stress in beams, and stress transformation."

"MEM 238 Dynamics 4.0 Credits Covers kinematics and kinetics in two and three-dimensional space, force and acceleration, linear and angular momentum, and energy methods."

"MAT 101 Fundamentals of Materials 4.0 Credits Examines principles underlying structure, properties, and behavior of engineering materials, including metals, ceramics, and polymers. Covers topics including bonding; crystal structure; defect structure; alloying; mechanical, electronic, and magnetic properties in relation to structure; phase equilibria; phase transformations; and oxidation and corrosion."

"MAT 221 Introduction to Mechanical Behavior of Materials 3.0 Credits Covers mechanics of materials, materials under load, application to materials testing, rate-dependent response to materials, fracture materials, fatigue behavior, manufacturing, and materials processing. Prerequisites: ... ENGR 220"

Goodness, Nicky is going to spall ;-)

-)