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论文类型：期刊论文

发表时间：2022-06-29

发表刊物：大连理工大学学报

所属单位：化工学院

卷号：52

期号：4

页面范围：487-491

ISSN号：1000-8608

摘要：There are still no reliable approaches to safety assessment on pressure
   vessels containing defects under multiple loads now.The 3D finite
   element method was adopted to calculate fracture ratio and load ratio
   used in safety assessment for nozzle containing through-wall crack at
   the shoulder under the combination of internal pressure and
   moment.Research results indicate that fracture ratio can be obtained by
   the stress intensity factor K_(Is) of crack under internal pressure and
   moment,which is the summation of stress intensity factor of crack under
   internal pressure and that under moment.Load ratio can be obtained by
   actual external loads,limit internal pressure p and limit moment m,and
   the relation between p and m fits the linearity
   equation.Therefore,safety assessment of nozzle containing through-wall
   crack at the shoulder under internal pressure and moment can be
   accomplished.

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