asi
ADVANCED STRUCTURAL INTERFACE
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VPDS created a process and software called Advanced Structural Interface (ASI). See the Sport Utility Vehicle (SUV) example analysis results of a Non-Linear rear axle link to frame bolted spherical bearing joint. The rear link and vehicle frame are flexible bodies with a linearized spherical joint in the machine simulation. Cut section boundary forces and deflections are extracted from rear link and rear frame defined sections of flexible bodies. A reduced section from each flexbody and the detailed spherical bearing bolted joint is modeled in ABAQUS to solve the Non-Linear contact and structural performance.
ASI is utilized to model Non-Linear joints and interfaces between two flexible bodies that are typically simulated as linear interfaces. ASI enables flexible body boundary loads to be extracted and applied to reduced sections of the full flexbody models at cut boundaries. A smaller section of each flexbody is utilized to model and analyze Non-Linear joint or interface details at one or more load time points. Pins, bearings, bolted joints and mounts are all examples of such structural interfaces.
Current ASI software extracts loads for application to ABAQUS models. This can readily be adapted for application to Optistruct models if requested.
See this double pendulum example analysis results that illustrates the structural performance difference between a linearized pin joint and a Non-Linear pin joint. Each link in the double pendulum is a linear flex body with a linearized spherical joint in the machine simulation. Cut section boundary forces and deflections are extracted from each link and applied to defined sections of flexible bodies. A reduced section from each flexbody and the detailed pin joint is modeled in ABAQUS to solve the Non-Linear contact and structural performance. This example shows the difference between the Linear versus Non-Linear pin joint stress results at each time point from the simulation.
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