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Loading Rate¡ªFor conventional (quasi-static) tests, the specimen shall be loaded such that the rate of increase of stress-intensity factor is between 0.55 and 2.75 MPa¡Ìm/s (30 and 150 ksi¡Ìin./min) during the initial elastic displacement.

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1Mpa
= 1000000 N/m2
= 1000 KN/m2
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3Â¥2014-08-21 11:38:27
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sunhua123AC

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3Â¥: Originally posted by С·¶bairoe at 2014-08-21 11:38:27
1Mpa
= 1000000 N/m2
= 1000 KN/m2
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4Â¥: Originally posted by sunhua123AC at 2014-08-21 13:44:36
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8Â¥2014-08-21 14:11:38
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sunhua123AC

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8Â¥: Originally posted by phoenix7573 at 2014-08-21 14:11:38
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sunhua123AC

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5Â¥: Originally posted by С·¶bairoe at 2014-08-21 13:56:45
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kic ¹«Ê½ÈçÏÂA 4.1: K=P/B*W^0.5*f(a/W)
A 4.2: f(a/W)=(2+a/W)*[0.886+4.64*(a/W)-13.22*(a/W)^2+14.72*(a/W)^3-5.6*(a/W)^4]/(1-a/W)^1.5
ÏȲâµÃP=41.875KN  B=37.74mm  W =76.13mm,  f(a/W)=9.09,
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