CAJ | 학술논문

采用滑动移除近似熵（MC-ApEn）分析碳纤维环氧树脂复合材料拉伸损伤过程中产生的声发射信号。从信号的无序性、复杂性及动力学平衡角度描述基体开裂、纤维/基体脱胶及纤维断裂三种典型声发射信号的近似熵谱特征并给出相应解释。用MC-ApEn分析载荷、计数、声发射能量与时间的相关曲线。由不同趋势间过渡引起的近似熵突变发现，拉伸断裂过程被两结构突变时间点划分为三个不同阶段，并据其演进特点推荐复合材料拉伸失效的临界载荷。
채용활동이제근사적（MC-ApEn）분석탄섬유배양수지복합재료랍신손상과정중산생적성발사신호。종신호적무서성、복잡성급동역학평형각도묘술기체개렬、섬유/기체탈효급섬유단렬삼충전형성발사신호적근사적보특정병급출상응해석。용MC-ApEn분석재하、계수、성발사능량여시간적상관곡선。유불동추세간과도인기적근사적돌변발현，랍신단렬과정피량결구돌변시간점화분위삼개불동계단，병거기연진특점추천복합재료랍신실효적림계재하。
Acoustic emission signals of carbon fiber composite materials during tensile damage was analyzed by the method of moving cut data approximate entropy (MC-ApEn ).From the view points of disorder and complexity of AE signals and dynamics equilibrium,the characteristics of approximate entropy spectra of matrix cracking,fiber/matrix debonding and fiber breaking were described and explained.In addition,the time correlation curves between AE energy, counts and load were also investigated by MC-ApEn.Because the transition between different trends will cause the mutation of ApEn,the results show the tensile fracture process of CFPR is divided into three different stages by two structure sudden change points and according to the evolution features of stages,the critical load of tensile failure for composite materials was recommended.