Simulative and experimental study of metal/polymer interfacial dynamic shear response
The dynamic response experiment has been a difficult point of the metal/polymer interfacial bonding performance testing, in which the metal surface state and the loading condition are key independent variables that should be comprehensively investigated. This work investigates the effect of loading velocity and Al surface porosity on Al/PMMA interfacial dynamic shear bonding performance. Firstly, simulation is applied to predict dynamic response variation trends. Simulation results show that the maximum force (MF) has minor changes with initial bullet velocity (IBV), while the de-bonding displacement (DD) and interface failure work (IFW) decrease obviously with IBV. All three indicators increase smoothly with the area ratio of PMMA interlocks. In experiment, the result plots of the indicators are all discrete, but as a whole, the MF plots could not be distinguished by the variation of IBV, while the plots of DD and NW decrease with IBV, which are consistent with simulation. The dynamic response indicators obtained by simulation and experiment show similar variation trends with their respective independent variables at certain ranges (surface porosity: − 15–20%/dm 2 , area ratio: 0–0.33) and could be contrasted to evaluate the indicator value differences at full range. By further analysis within MF and DD indicators, the stability of the dynamic interfacial stiffness is discovered at their respective loading velocities, which is similar static loading in past work. The strengthening and weakening mechanisms of Al/PMMA interface are also inferred. This experiment–simulation combined work exhibits a systematic method to predict the dynamic response with the variation of the independent investigating variables at certain ranges, to evaluate the degree of deviation of the experimental plots from simulative ones and to help determine the porosity range where higher dynamic response would be obtained, which would be also applied to other metal/polymer layered system. Graphical abstract
危险品化学品经营许可证（带存储）