Drop & Impact Analysis for Electronic Products | Radioss

【 Background 】

       In drop and impact analysis of electronic products, special structural shapes and snap-fit designs often result in very large mesh counts and very small minimum element sizes, leading to long computation times.
       This case study shares how  Radioss leverages unique techniques to balance analysis efficiency and accuracy in impact analysis, and further extracts equivalent static loads from the impact results for optimization analysis. 

Further reading：Radioss Product Introduction

【 Results 】

       We used Radioss to perform impact analysis for electronic products. The technical highlights include:

• High-accuracy first-order elements

• Accurate single-precision computation

• Dynamic dissipation ADYREL

• Dynamic Relaxation

• Static load extraction

• Contact stiffness adjustment, and more

    For different cases, impact analysis speed was improved by 2–5 times.

【 Technical Highlights 】

Accurate single-precision elements

       Radioss provides accurate single-precision elements. In many applications, this enables several-fold speedups compared to double precision while still delivering accurate results.
 

High-accuracy first-order elements:

       quadratic first-order tetra element (tetra element with 6 degrees of freedom per node).
 

Multiple drop tests

       In traditional multiple drop analyses, a significant amount of time is spent stabilizing the model between each drop. With Radioss, there is no need to switch between Explicit / Implicit solvers. Its unique Dynamic Relaxation technology enables rapid stabilization and efficient completion of multiple drop simulations.

Quasi-static analysis

       For quasi-static compression analyses carried out with explicit methods, we often increase the compression speed to improve efficiency. By combining mass scaling with Radioss unique dynamic dissipation (ADYREL), we can significantly enhance analysis efficiency while still obtaining accurate results.

Preload and multi-step analysis

       For analyses that require interference fit / preload simulation, Radioss does not need to switch to an implicit solver, thus avoiding convergence issues. Preload and drop simulations can be completed in a single run.
 

Using equivalent static loads for optimization analysis

       Radioss can extract equivalent static loads from impact events and use them for topology optimization, or combine them with HyperStudy for parameter optimization.
 

Accurate contact

       Includes both linear and nonlinear contact stiffness options to handle contact conditions of varying complexity. Users can choose as needed to achieve maximum analysis efficiency.