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�������պ����ѧѧ�� 2003, Vol. 29 Issue (7) :575-578    DOI:
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1. �������պ����ѧ �����������Ӧ����ѧϵ, ���� 100083;
2. �й�����ƹ����� ��ʮһ�о���, ���� 100074
Research on relation between crack extension resistance curve and sample thickness
Yang Jiyun1, Zhang Xing1, Zhang Min2*
1. Dept. of Flight Vehicle Design and Applied Mechanics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. 31st Research Institute, China Aerospace Science and Industry Corporation, Beijing 100074, China

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Abstract�� A mathematical formula for the relation between resistance curve of crack extension and sample thickness was obtained in fracture mechanics, based on the theoretical resistance curve of crack extension which was provided in the previous work. Some parameters in the formula were determined by the least square method. The resistance curve equation of specimen with arbitrary sample thickness can be calculated by this method. The mathematical expression is verified by test results and additional data may be provided by this expression for complementing the current handbook.
Keywords�� crack propagation   resistance curves   curve fitting     
Received 2002-05-09;
Fund:

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About author: �����(1975-),��,ɽ��������,��ʿ��, yhahay@sina.com.cn.
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�����, ����, ����.������չ����������������ȹ�ϵ[J]  �������պ����ѧѧ��, 2003,V29(7): 575-578
Yang Jiyun, Zhang Xing, Zhang Min.Research on relation between crack extension resistance curve and sample thickness[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2003,V29(7): 575-578
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