Mechanical Behavior On Bonding Structure Of Optical-mechanical System

The technology of bonding is a new technology which is developed in recentdecades, it plays an increasingly important role in manufacturing optical instruments.Using this technology simplifies the structure and process equipment, savingprocessing time and raw materials, lower the production costs, and it can improvethe reliability of the instrument by overcoming the loosening due to mechanicalconnection. As the study did not keep up with the actual technology development, itwill restrict the future applications, this paper improve the traditional methods ofanalysis for bonding structure.This paper analyzes and summarizes the process and the mechanical behavior onbonding structure of the optical-mechanical system. Considering of the accuracyrequirements for the analysis, the method of nonlinear analysis will be adopted. First,according to the mechanical properties of the material, the viscoelastic will be thematerial properties, because of easy to solve the differential constitutive equationsand having a good software interface, we chose the generalized Maxwell model asthe element model, though theoretical analysis we get the stress-strain relationship ofthe generalized Maxwell model, if there is temperature change, we also assume it isthermal rheological simple materials, the stress-strain relationship should bechanged properly, then we can get the relationship between the stress-strain、the timeand the temperature. Second, the experimental data can not be directly substituted into the finite element software, we need fix the experimental data to the parameter,the different experimental data have different fitting methods, this paper give adetailed introduction. Third, though adding the nonlinear constitutive equation to thefinite element analysis, this method of calculation is different from the linearcalculation, its elastic matrix is associated with time and the stiffness matrix isrelevantly changed. Then, this paper get the theoretical solution of the cure shrinkagestress by theoretical analysis, it is verified by the finite element software, the finiteelement solution fits well with the theoretical analysis, so we can use the theoreticalsolution to optimize the curing craft parameters; heat stress is analyzed, we get thedifference of the results of finite element analysis between the method with WLFequation and the method without WLF equation; we have a preliminary study of thelinear simplified processing of the nonlinear analysis, though changing the strain ofthe linear analysis, we can get the nonlinear results, the degree of changing the strainis related to the time and the temperature, so the linear analysis has inherited thedependence on time and temperature of the nonlinear material. Finally, though thesurface figure error we can combine the optical analysis and the structural analysiseffectively, and we fit the deformation to the PV and RMS values of the lens.