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Abstract:
The yielding spread mechanism and the variations of fracture
parameters in loading are investigated by means of wide plate tests and
bursting experiments on cracked vessels. The relationships between the
stresses, strains and COD (σ) on these plates and vessels are presented
and explained. In order to study assessment criteria the test results
have been assessed with COD design curve in accordance with ⅡW. Doc.
741-74, in which the values of three point bending COD test were used.
The conclusions are that the significance of defects have to be directly
related to the overall behaviour and assessment of overall behaviour can
be based o the gross strength and gross ductility.
Key words: 强度 韧度 裂纹张开位移 临界裂纹尺寸
国家自然科学基金资助项目. Received 198912,
received in revised form 199010
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