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cavelamb himself[_4_] cavelamb himself[_4_] is offline
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Default Are higher grade bolts more brittle? (OK Ed, I think you're mostlyright)

Ed Huntress wrote:
"Christopher Tidy" wrote in message
...

Ed Huntress wrote:

snip

I don't believe this argument applies to a joint consisting of a single
bolt, considered in isolation.

Thanks for an interesting discussion. This is what I come to RCM for!

Best wishes,

Chris



Since you've put some thought into this, you may find that reading a more
sophisticated engineering treatment of it would be worth your while. It's
too far in the past for me to remember much of it but there is plenty of
material on ductility and brittle failure in the field of aerospace
engineering. It's a very big issue there.

You could try the SAE website, which has a bookstore and white papers in the
aerospace division.

--
Ed Huntress




Pardon the messy line wrapping - just wanted to show what's there...


http://euler9.tripod.com/analysis/asm.html



Astronautic Structures Manual (On-Line), NASA MSFC (Marshall Space
Flight Center), 1975.
Astronautic Structures Manual, Volume 1, NASA TM-X-73305, NASA MSFC,
August 1975, 839 pages.
Astronautic Structures Manual, Volume 2, NASA TM-X-73306, NASA MSFC,
August 1975, 974 pages.
Astronautic Structures Manual, Volume 3, NASA TM-X-73307, NASA MSFC,
August 1975, 673 pages.

Abstract: This document (Volume 1, 2, and 3) presents a compilation of
industry-wide methods in aerospace strength analysis that can be carried
out by hand, that are general enough in scope to cover most structures
encountered, and that are sophisticated enough to give accurate
estimates of the actual strength expected. It provides analysis
techniques for the elastic and inelastic stress ranges. It serves not
only as a catalog of methods not usually available, but also as a
reference source for the background of the methods themselves.
Volume 1 (37.1 MB)
Section A: Introduction, stress and strain, loads, combined stress,
and interaction curves.
A0.0.0 Downloadable hyperlink TOC, asm-A000.htm, 0.02 MB.
A1.0.0 Stress and strain, asm-A100.pdf, 1.31 MB.
A2.0.0 Loads, asm-A200.pdf, 0.35 MB.
A3.0.0 Combined stresses, asm-A300.pdf, 0.98 MB.
A4.0.0 Metric system, asm-A400.pdf, 1.03 MB.
Section B: Methods of strength analysis.
B1.0.0 Joints and fasteners, asm-B100.pdf, 2.14 MB.
B2.0.0 Lugs and shear pins, asm-B200.pdf, 0.60 MB.
B3.0.0 Springs, asm-B300.pdf, 1.08 MB.
B4.0.0 Beams, beam tables, asm-B400.pdf, 1.32 MB.
B4.5.0 Plastic bending, asm-B450.pdf, 1.27 MB.
B4.5.5 Plastic bending curves: stainless steel, asm-B455.pdf, 6.03 MB.
B4.5.6 Plastic bending curves: alloy steel, asm-B456.pdf, 2.82 MB.
B4.5.7 Plastic bending curves: titanium, asm-B457.pdf, 0.96 MB.
B4.5.8 Plastic bending curves: aluminum, asm-B458.pdf, 5.06 MB.
B4.5.9 Plastic bending curves: magnesium, asm-B459.pdf, 1.31 MB.
B4.6.0 Beams under axial load, asm-B460.pdf, 1.38 MB.
B4.7.0 Lateral buckling of beams, asm-B470.pdf, 0.50 MB.
B4.8.0 Shear beams, asm-B480.pdf, 1.76 MB.
B5.0.0 Frames, frame tables, asm-B500.pdf, 2.47 MB.
B6.0.0 Rings, asm-B600.pdf, 4.68 MB.
Volume 2 (28.7 MB)
Section B: Methods of strength analysis (cont.).
B7.0.0 Thin shells, asm-B700.pdf, 0.74 MB. -- Slightly faded copy.
B7.1.0 Membrane analysis of thin shells of revolution,
asm-B710.pdf, 0.74 MB.
B7.1.2 Dome membrane analysis, asm-B712.pdf, 1.18 MB.
B7.2.0 Local loads on thin spherical shells, asm-B720.pdf, 1.70 MB.
B7.2.2 Local loads on thin cylindrical shells, asm-B722.pdf, 0.86 MB.
B7.3.0 Bending analysis of thin shells, asm-B730.pdf, 2.43 MB.
-- Some tables faded!
B7.3.4 Bending analysis of thin shells (cont.), asm-B734.pdf, 0.91 MB.
B8.0.0 Torsion of solid sections, asm-B800.pdf, 0.85 MB.
B8.3.0 Torsion of thin-walled closed sections, asm-B830.pdf, 0.73 MB.
B8.4.0 Torsion of thin-walled open sections, asm-B840.pdf, 0.97 MB.
B9.0.0 Plates, asm-B900.pdf, 1.72 MB.
B9.4.0 Plates (cont.), asm-B940.pdf, 1.76 MB.
B10.0 Holes and cutouts in plates, asm-B970.pdf, 0.73 MB.
B10.2 Large holes and cutouts in plates, asm-B972.pdf, 0.96 MB.
Section C: Structural stability analysis.
C1.0.0 Long columns, short columns, crippling, asm-C100.pdf, 1.06 MB.
C1.5.0 Torsional instability of columns, asm-C150.pdf, 1.18 MB.
C2.0.0 Stability of flat plates, asm-C200.pdf, 1.20 MB.
C2.2.0 Stability of curved plates, asm-C220.pdf, 2.59 MB.
C3.0.0 Stability of shells, asm-C300.pdf, 0.52 MB.
C3.1.0 Stability of cylinders, asm-C310.pdf, 1.96 MB.
C3.2.0 Stability of conical shells, asm-C320.pdf, 0.80 MB.
C3.3.0 Stability of doubly curved shells, asm-C330.pdf, 0.96 MB.
C3.4.0 Computer programs in shell stability analysis,
asm-C340.pdf, 0.87 MB.
C4.0.0 Local instability of flat panels, asm-C400.pdf, 1.31 MB.
Volume 3 (21.4 MB)
Section D: Thermal stresses.
D1.0.0 Thermal stresses, asm-D100.pdf, 0.54 MB. -- Some
characters faded.
D3.0.0 Thermal stresses in beams, asm-D300.pdf, 0.99 MB. --
Some characters slightly faded.
D3.2.3 Thermal stresses in beams (cont.), asm-D323.pdf, 1.07 MB.
D3.7.0 Thermal stresses in plates, asm-D370.pdf, 1.39 MB.
D3.8.0 Thermal stresses in shells, asm-D380.pdf, 1.88 MB.
D4.0.0 Thermoelastic stability, asm-D400.pdf, 1.20 MB.
D5.0.0 Inelastic thermal effects, asm-D500.pdf, 0.55 MB.
D6.0.0 Thermal shock, asm-D600.pdf, 2.21 MB.
Section E: Fatigue and fracture mechanics.
E1.0.0 Fatigue, asm-E100.pdf, 1.06 MB.
E1.3.0 Fatigue (cont.), asm-E130.pdf, 2.43 MB.
E1.5.0 Fatigue (cont.), asm-E150.pdf, 0.76? MB.
E2.0.0 Fracture mechanics, asm-E200.pdf, 1.49 MB.
E2.4.0 Fracture mechanics (cont.), asm-E240.pdf, 2.21 MB.
Section F: Composites.
F1.0.0 Composites, basic concepts, asm-F100.pdf, 0.77 MB.
F1.2.0 Mechanics of laminated composites, asm-F120.pdf, 0.74 MB.
F2.0.0 Strength of laminated composites, asm-F200.pdf, 0.24 MB.
Section G: Rotating machinery.
G1.0.0 Rotating disks, asm-G100.pdf, 0.55 MB.
Section H: Statistics.
H1.0.0 Statistical methods, introduction, asm-H100.pdf, 0.56 MB.
H1.2.0 Statistical methods, measuring
performance of a material, asm-H120.pdf, 0.66 MB.