孔边小裂纹生成与扩展

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1989, Vol. 10 ›› Issue (12): 671-673.

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THE INITIAION AND PROPAGATION OF SMALL CRACK AT THE EDGE OF A HOLE

Lv Guozhi

Northwestern Polytechnical University

Received:1989-04-01 Revised:1900-01-01 Online:1989-12-25 Published:1989-12-25

Abstract

Abstract:

In the present paper, the initiation and propagation of small cracks at the edge of a center hole in flat specimens made of LC4CZ Al. alloy have been studied. The plastic zone by the hole edge and its effect on the initiation and propagation of the small crack also were investigated. The characteristic of crack propagation was observed and determined carefully by using replica and acoustic emission technique, and the shape of the front of the crack was delineated by appling mark load.

Key words: small crack, initiation and propagation, main crack

Lv Guozhi. THE INITIAION AND PROPAGATION OF SMALL CRACK AT THE EDGE OF A HOLE[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1989, 10(12): 671-673.

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THE INITIAION AND PROPAGATION OF SMALL CRACK AT THE EDGE OF A HOLE

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