Page 178 - Marine Structural Design

154 Pari XI Ultimate Strength

id Fracture Strength Analysis
Buckling Strength Fracture Strength
~ ~
Loads Compressiodtorsiodshear Tensile loads
force
Imperfection Geometrical imperfection and Defects due to fabrication and
residual stress due to welding, fatigue loads
impacts etc.
Linear fiacture mechanics
Design criteria Curve fitting of theoretical Curve fitting of theoretical
equations (Perry-Robertson, equations(interacti0n equation
Johnson etc) to test results between ductile collapse and
brittle fracture) to test results
Analysis Objectives (1) Determine buckling load, (1) Determine fracture load,
(2) Determine allowable (2) Determine allowable
defect size,
imperfection,
(3) Determine dimensions
(3) Determine dimensions such
as stiffness, wall-thickness such as wall-thickness etc.
etc.

8.5 References

1. Timoshenko, S. P. and Gere, J. (1961), “Theory of Elastic Stability”, McGraw Hill.
2. Galambos, T.V. (2000), “Guide to Stability Design Criteria for Metal Structures”, 4th
Edition, John Wiley & Sons.
3. Hughes, 0. (1988), “Sh, Structural Design, A Rationally Based, Computer Aided
Optimization Approach“, SNAME, (previously published by John Wiley & Sons, in
1983).