As a typical load form,the impact of foreign objects,such as gravel splashing on the outer bogie fairing at the bottom of the train during the high-speed running of rail vehicles,should be considered during the design process.The carbon fiber-epoxy resin composite fairing of 400 km/h high-speed EMU is used as the research object in this paper.Impact tests were conducted with aluminum laminates at two different speeds,referring to GB/T 32058-2015 and other standards and design requirements.A finite element model was established using Abaqus software to analyze the complex intralaminar and interlaminar damage.In the form of VUMAT,the model simulates the intra-layer damage behavior of fabric layer after impact,utilizing the theory of continuous damage medium mechanics.Additionally,the model employs the cohesive element with 0 thickness to simulate the delamination damage between adjacent layers.The morphological comparison of the impact test results confirms the effectiveness of the model,and on this basis,the effect of the lay-up angle,impact angle and aluminum bullet size on the damage to the laminate is investigated.
维普
万方数据
