CAJ | 학술논문

针对膨胀环的碎裂问题,以Mott碎裂理论和Grady能量平衡理论为基础,利用裂纹张开位移碎裂模型(crack opening displacement model,COD)描述脆性无氧铜环的碎裂特性,并推导了碎片尺寸和数目表达式.利用电磁膨胀环加载技术,完成了不同应变率的脆性无氧铜(TU1)环碎裂实验,实验结果与理论计算结果符合较好,可为脆性金属环膨胀碎裂特性描述提供参考.
침대팽창배적쇄렬문제,이Mott쇄렬이론화Grady능량평형이론위기출,이용렬문장개위이쇄렬모형(crack opening displacement model,COD)묘술취성무양동배적쇄렬특성,병추도료쇄편척촌화수목표체식.이용전자팽창배가재기술,완성료불동응변솔적취성무양동(TU1)배쇄렬실험,실험결과여이론계산결과부합교호,가위취성금속배팽창쇄렬특성묘술제공삼고.
The Crack Opening Displacement model (COD model ), which is based on Mott's statistical theory and Grady's energy balance theory, is used to describe the brittle fragmentation characteristic of TU1 ring. The formula of fragment size and number are derived from the COD model. The fragmentation experiments of brittle TU1 rings were carried out by freely expanding ring driven by electromagnetically loading at different stain rate. The experimental results are in agreement with the COD model, and provide an important reference to the description of the brittle metal fragmentation behavior.