Question 2
1
a) Given: A 7mm long edge crack in a wide plate, A stress range of 50MPa with a period of 10 seconds, Paris Law coefficients 5.2 x 10 -12 and 3, for use with units of m and MPa, Y = 1.1 and ae =3mm Calculate a.1) The ΔK value. a.2) The crack growth per cycle a.3) The time (in years) to grow the crack from 6.5 to 7.5mm (you may assume a constant crack growth rate over that increment of crack growth).
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quest 2
Transcript of Question 2
a) Given:
A 7mm long edge crack in a wide plate,
A stress range of 50MPa with a period of 10 seconds,
Paris Law coefficients 5.2 x 10-12 and 3, for use with units of m
and MPa,
Y = 1.1 and ae =3mm
Calculate
a.1) The ΔK value.
a.2) The crack growth per cycle
a.3) The time (in years) to grow the crack from 6.5 to 7.5mm (you
may assume a constant crack growth rate over that increment of
crack growth).
