MODELING OF ULTRASONIC NONLINEARITIES FOR DEBRIS CLOUD-INDUCED MICRO-VOIDS CHARACTERIZATION:THEORETICAL ANALYSIS AND NUMERICAL VALIDATION

摘要：

　　Micro-damage, from dimples through micro-voids to micro-cracks, are formed underneath the pitting damage due to the debris cloud hypervelocity impact (HVI).Evaluation of this specific type of micro-damage is far beyond the detectability of conventional approaches using guided ultrasonic waves (GUWs), because the large number of micro-voids in the pitting damage region cause highly complex.Targeting the quantitative characterization of these micro-voids, an analytical model is developed to interpret the generation of high-order modes when a GUW traversing from the perspective of linear and nonlinear GUW features.Validation of this theoretical analysis is ascertained via numerical simulation.On this basis, an evaluation framework is developed whereby the micro-voids can be quantitatively depicted.

关键词： Debris cloud Hypervelocity impact (HVI) Micro-voids Guided ultrasonic wave (GUW)

作者: Wu-xiong CAO Bao-jun PANG Zhong-qing SU Run-qiang CHI Yuan CAI Ye-fei HUANG

作者单位: School of Astronautics, Harbin Institute of technology, Harbin, 150081, China;Department of Mechanic School of Astronautics, Harbin Institute of technology, Harbin, 150081, China Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, P.R.China

会议类型: 国际会议

会议名称: The 2019 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2019(第13届)全国压电和声波理论及器件技术研讨会)

会议地点: 哈尔滨

会议语种:英文

页码: 476-480

在线出版日期: 2019-01-11（万方平台首次上网日期，不代表论文的发表时间）