CAJ | 학술논문

采用全局矩阵理论,通过引入内聚强度弱化模型和弹簧模型,计算了脱粘缺陷对粘接结构频散特性的影响.分析了内聚强度缺陷、界面缺陷及混合缺陷等因素对粘接结构频散特性的影响,发现频散曲线的演化规律与材料声学性质密切相关.不同材料和不同组合,其规律有很大不同.针对各向同性粘接结构,可能通过考察特定频率段内频散模态的变化,实现对脱粘缺陷的检测.
채용전국구진이론,통과인입내취강도약화모형화탄황모형,계산료탈점결함대점접결구빈산특성적영향.분석료내취강도결함、계면결함급혼합결함등인소대점접결구빈산특성적영향,발현빈산곡선적연화규률여재료성학성질밀절상관.불동재료화불동조합,기규률유흔대불동.침대각향동성점접결구,가능통과고찰특정빈솔단내빈산모태적변화,실현대탈점결함적검측.
For assessing the influences of disbond defects on the dispersion property of adhesive bonding structure, an improved global matrix method is introduced, and the defects are described by the cohesive strength degradation mode and the spring mode.In this paper, cohesive strength failure, interface failure and the mixed failure are analyzed.The evolution regularity of dispersive curves strongly depends on the acoustic propertie of the material, which maybe distinct for different materials and plying manners.For the adhesive bonding of isotropic materials, the disbond defects may be detected by measuring the variety of the dispersive modes in a special frequency band.