| In this paper,ANSYS finite element software cylinders containing wound layer surface cracks and internal defects wound layer stratified temperature field of thermal analysis.Change composite cylinder surface crack geometry,summarize the heating-cooling process,the influence of temperature on the surface of the field,and take advantage of the maximum time difference between the temperature of the center appears to Crack depth semi-quantitative analysis;defect depth analysis stratified,size,thickness and strength of the composite cylinder heating surface of the heat as the temperature difference,the thermal image contrast of.The main conclusions are as follows:(1)the size of the crack length on composite cylinder surface temperature anomaly region’s largest,but also affect the geometric center of the corresponding crack composite cylinder surface temperature difference between the maximum;in the latter part of the heating and cooling process,the crack length composites change the cylinder surface temperature field plays a leading role in the region;crack area corresponding composite cylinder surface temperature field area change over time,the same region contour sharpness also change with time change.(2)The composite cylinder surface crack,crack depth mainly affecting the pre-heating temperature of the surface of the abnormal area,affecting both the geometric center corresponding to crack composite cylinders difference between the maximum temperature of the surface,for the same depth of the crack,in substantially the same time appears central surface temperature maximum.(3)The composite cylinder layered composite material layer,as compared with smaller layered,delamination and the thickness of the larger deep layered,stratified more shallow depth,the larger the area,and when the thickness is thicker,which corresponds to the maximum contrast and the greater the difference in temperature.Show in the actual testing process,the larger the area,the more shallow depth,the greater the thickness of the more conducive to testing.(4)for composite cylinders lamination defects,affect the heating intensity oncontrast and most easily detected very little time,only the temperature difference affected.(5)In order to study the relationship between the intensity of heat and layered composite cylinder geometry between the actual detection,the paper changed layered composite cylinder defect geometries its thermal analysis,simulation results show that the layered area the larger,the smaller the depth of the lower heating strength requirements. |
