Acta Metallurgica Sinica (English Letters) ›› 1989, Vol. 2 ›› Issue (5): 354-358.

• Research paper • Previous Articles     Next Articles

CRACK INITIATION AND STEADY PROPAGATION OF ELASTIC-PLASTIC MATERIALS IN PLANE STRESS CONDITION

ZHUANG Tao WANG Zhongfang Central Iron and Steel Research Institute,Ministry of Metallurgical Industry,Beijing Dept.No.13,Central Iron and steel Research Institute,Ministry of Metallurgical Industry,Beijing,China   

  • Received:1989-10-25 Revised:1989-10-25 Online:1989-10-25 Published:2009-10-10

Abstract: The crack tip stress-strain fields of the elastic-plastic cracked specimens have been analyzed using finite element calculations.The crack initiation and steady propagation behaviours have also been investigated by means of slip line pattern etching technique and mechanical tests. The results show that there are HRR near field and distant field in the crack tip region,and the later depends on the specimen configuration.The crack initiation behaviour is controlled by a single parameter J.In contrast,the steady crack propagation is affected by the distant strain field and can not be described by single parameter only.

Key words: plane stress, elastic-plastic material, crack propagation, steel 00Cr14Ni14Si4