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Issue link: https://adp.epubxp.com/i/882200
www.ADandP.media AD&P; ∕ OCTOBER 2017 SIMULATION Altair Radioss has a variety of new shell elements to better analyze composite failures in vehicular crashes. This simulation is of an offset frontal impact with a moving deformable barrier. material parameters. Three types of tests are supported: uniaxial, equibiaxial, and planar (i.e., plain stress-strain test). Radioss has two main implicit solvers to simulate springback in metal forming: MUMPS, which is new, and the existing BCS. Company officials say MUMPS has higher scalability than BCS, and the accuracy of the results are about the same. Better, MUMPS is faster, and the displacement results after springback are more user-friendly because rigid body motion has been removed. Regarding the module's performance, nodal time step is now applied to the remaining parts when advanced mass scaling (AMS) is applied to a group of parts. In the previous version, say company officials, "element time step was applied at the borders of the not-AMS parts, which was either reducing AMS benefits or making it ineffective in some cases. The global time step method calculates the stable time step based on the full model, which often results in higher time step than the element or nodal-based time step." This change potentially reduces CPU time from 24 percent to 48 percent. OPTIMIZING PARTICULARS In OptiStruct, finite sliding (continuous sliding) is now supported, which helps in analyzing gear interactions. Loads and friction can be time-dependent. The Ogden model is now supported for hyperelastic materials and the Puck failure criteria is supported for composite materials. For NVH analysis, brake squeal analysis is supported, complex eigenvalue analysis can be used for acoustic analysis and inertial relief analysis can be performed for models with more than six rigid body modes. Bore deformation can be constrained during optimization, one-step transient thermal analysis can be used with optimization and both seam and spot weld fatigue constraints and Neuber stress and strain responses have been added. AUTO MOTION MotionSolve 2017 has several new ways for designing products and enhancements for analyzing physical events. For instance, a new truck library contains truck components and 41