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《Journal of Northeastern University(Natural Science)》 2008-05
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An Improved Finite Element Model for Dynamic Simulation of Cracked Beam

WU Ning-xiang,XIE Li-yang,WU Ke-qin,YOU Mei-yan(School of Mechanical Engineering & Automation,Northeastern University,Shenyang 110004,China.)  
Because of no definition given to the smeared crack model in crack influencing zone,a calculation method based on the principle of equivalence of strain energy is proposed to determine the crack element length,thus enabling the conventional rough modeling process to be more practical and finding out the dependence of crack depth on crack influencing zone.It is found that the crack influencing zone becomes maximum when the dimensionless crack depth is 0.4 which is 0.443 times as large as the beam height.A numerical example is given and shows that the simulation results by use of the improved model is basically in conformity to testing results.
【Fund】: 教育部高等学校博士学科点专项科研基金资助项目(20050145027)
【CateGory Index】: O342
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6 FAN De-li;ZHENG Shi-jie;WANG Hong-tao;State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautic;College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics;;Multiple damages detection of structure based on hierarchical genetic algorithm[J];Journal of Aerospace Power;2013-09
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