作者alan0311 (彦伦)
看板NTUMSE-98
标题[情报] 材导作业
时间Tue Nov 24 19:42:11 2009
习题12/1交
8-2
8-10
8-11
(这题是要写报告report for one nondestructive test and example only.
put down the sources, at least 1/2 page)
8-17
8-D2(a)
以下的不是加分题，是一定要写的
A gas storage tank is made of 0.1m thick 1040 medium carbon steel plates.
which has a yield strength of (sigma)y MPa
and a fracture toughness of 55MPa m^0.5
the steel plate is under a tensile stress of (sigma)b MPa
You can use an X-ray detector and find out the largest crack length
in the steel plate is 0.01m
(a)what is the critical stress (sigma)c,
above which brittle fracture will occur?
(b)what is the ideal ranking of the stresses (sigma)y, (sigma)b, (sigma)c?
list them from large to small.
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