|
Abstract Materials of H59 brass has been chosen for the preparation of cylindrical specimens which contain one pore, two pores, three pores and four pores, and YE-600 hydraulic pressure testing machine has been used for compression tests on these specimens. The effects of pore distribution on contact strength of thick-walled cellular structures have been discussed, and the damage mechanism of cellular structures has been explored by finite element method. The results show that: the level distribution approach of two pores is superior to the vertical approach; oblique equilateral triangle distribution approach of three pores is better than the equilateral triangle approach; square distribution approach of four pores is superior to the diamond approach; the increasing of pore distribution radius and the number of pores will improve the contact strength of thick-walled cellular structures; cracks generated in the edge of pore which is the nearest away from the initial point of contact; the cracks were caused by the largest principal stretching stress and expanded along the zone of pores stress concentration.
|
|
Received: 23 March 2009
|
|
|
|
2010, Vol. 31 
