CAJ | 학술논문

应用基于模态应变能的损伤识别方法对复合材料层合板的层间损伤进行定位研究，并基于单元模态应变能变化率提出了改进的损伤指标。通过有限元软件方法模拟复合材料板层与层之间的损伤(如残留气泡等缺陷引起的损伤)，提取受损模型的各阶模态振型，将改进的单元模态应变能变化率作为复合材料层合板的损伤定位指标。通过有限元数值模拟，验证了模态应变能方法在复合材料层合板定位层间损伤的有效性，从而在保证损伤定位精度的前提下，大大减小后期分析的工作量。
응용기우모태응변능적손상식별방법대복합재료층합판적층간손상진행정위연구，병기우단원모태응변능변화솔제출료개진적손상지표。통과유한원연건방법모의복합재료판층여층지간적손상(여잔류기포등결함인기적손상)，제취수손모형적각계모태진형，장개진적단원모태응변능변화솔작위복합재료층합판적손상정위지표。통과유한원수치모의，험증료모태응변능방법재복합재료층합판정위층간손상적유효성，종이재보증손상정위정도적전제하，대대감소후기분석적공작량。
The method of damage detection based on modal strain energy was applied for composite laminates to detect interlaminar damage,and a modified damage index based on modal strain energy ratio was proposed. The interlaminar damage of composite laminates (e.g. caused by residual bubbles) was simulated byfinite element method. The mode shapes of damage model were obtained to calculate the modified modal strain energy ratio as the damage index for composite laminates. Byfinite element simulating, the validityof the modal strain energy method for interlaminar damage detection in composite laminates was verified. In order to ensure the damage location precision,the workload of later analysis was greatly reduced.