9. (a) Sketch the Mode I, Mode II, and Mode III crack opening geometries, and clearly state which is the most commonly found in engineering structures. (b) Define plane stress and plane strain, making clear which, if any, of the stresses are zero in each case. (c) What is plane strain fracture toughness? are zero in each case. (0) what is 10. (a) Write Griffith's expression for the fracture stress of a material under plane stress conditions. Identify which parameters are applied and which are material constants. (b) What is the leak-before-break condition? Please explain.
9. (a) Sketch the Mode I, Mode II, and Mode III crack opening geometries, and clearly state which is the most commonly found in engineering structures. (b) Define plane stress and plane strain, making clear which, if any, of the stresses are zero in each case. (c) What is plane strain fracture toughness? are zero in each case. (0) what is 10. (a) Write Griffith's expression for the fracture stress of a material under plane stress conditions. Identify which parameters are applied and which are material constants. (b) What is the leak-before-break condition? Please explain.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:9. (a) Sketch the Mode I, Mode II, and Mode III crack opening geometries, and
clearly state which is the most commonly found in engineering structures.
(b) Define plane stress and plane strain, making clear which, if any, of the
stresses are zero in each case. (c) What is plane strain fracture toughness?
10. (a) Write Griffith's expression for the fracture stress of a material under
plane stress conditions. Identify which parameters are applied and which
are material constants. (b) What is the leak-before-break condition? Please
explain.
I
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Note : As per guidelines, we will only discuss the first one as it is not particularly mentioned which question's answer is required.
Given question,
- Sketches of mode I, mode II and mode III crack opening geometries. Which geometry is most commonly found in engineering structure
- What is plane stress and plane strain?
- What is plane strain fracture toughness?
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