ch3-LEFM2

ch3-LEFM2 - Effect of finite size of component The SIF...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Effect of finite size of component I K Y a where Y = configuration factor = σ π The SIF derived earlier is for cracks in an infinite body. However the finite size, geometry of the component, loading conditions have effect on SIF. The shape or configuration effect is given by a factor Y such that SIF for some of the standard geometry are shown below
Background image of page 1

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

View Full Document Right Arrow Icon
Background image of page 2
Background image of page 3

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

View Full Document Right Arrow Icon
Background image of page 4
Background image of page 5

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

View Full Document Right Arrow Icon
Background image of page 6
Background image of page 7

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

View Full Document Right Arrow Icon
Background image of page 8
What is Fracture Toughness? Fracture toughness is a measure of the ability of a material to resist the growth of a pre-existing crack or flaw. The fracture toughness of a material is characterized by the energy per unit area which is required to create new crack surfaces, and thereby propagate a crack through the material. This value is known as the critical stress intensity factor. The critical SIF at plane stress condition is denoted by K (                  ) In practice we may attain K C by increasing either σ or a. For a defect of fixed length a, σ C is the critical value of the applied stress for fracture. Alternatively, for a constant applied stress σ , a C is the critical defect size for fracture.Note that K C is a macroscopic criterion for failure. It makes no assumptions about the precise mechanism of fracture. K IC  is the critical SIF at plane
Background image of page 9

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

View Full Document Right Arrow Icon
K Ic pure ductile metals 100--350 pressure vessel steel 170 high strength steel 50--150 titanium alloys 50--110 GFRP, fibreglass 20--60 aluminium alloys 20--45 cast iron 6--20 reinforced concrete
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 19

ch3-LEFM2 - Effect of finite size of component The SIF...

This preview shows document pages 1 - 11. Sign up to view the full document.

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