CAJ | 학술논문

本文从宏观的角度探讨了泡沫镍的单向拉伸断裂行为.将孔率为88.29%的泡沫镍试样在室温下进行不同速率的单向拉伸,并与致密镍板的拉伸断裂现象进行对照,考察其拉伸断裂行为的异同.结果表明,泡沫体在拉伸过程中亦表现出宏观的塑性变形特征,但相对于致密体来说,其宏观脆性显著提高.此外,泡沫体在断裂时表现为一个明显的渐进过程,而致密体则相应为一个瞬间过程.
본문종굉관적각도탐토료포말얼적단향랍신단렬행위.장공솔위88.29%적포말얼시양재실온하진행불동속솔적단향랍신,병여치밀얼판적랍신단렬현상진행대조,고찰기랍신단렬행위적이동.결과표명,포말체재랍신과정중역표현출굉관적소성변형특정,단상대우치밀체래설,기굉관취성현저제고.차외,포말체재단렬시표현위일개명현적점진과정,이치밀체칙상응위일개순간과정.
The tensile fracture has been macroscopically investigated for nickel foam under uniaxial tension. The samples of nickel foam with porosity of 88.29% were uniaxially tensioned at various rates at room temperature, and the phenomena of tensile fracture were compared with that from the fully dense plate of metal nickel, so as to inves-tigate the differences in their tensile fracture behaviors. The results indicate that nickel foam also displays the fea-ture of macroscopic plastic deformation during tension, but it shows a macroscopic brittleness much more than that of the fully dense body. In addition, it's an obviously gradual course for the foamed body fracture, and a transient process for the dense body.