Cr_ker.

Introducing Cr_ker, the topological redesign of the nutcracker. The project carried out using Creo Parametric simulation involves the study and implementation of topological optimization of a nutcracker. In this process, the forces acting on the nutcracker, constraints, material properties, loading conditions, and other relevant parameters are analyzed.

The nut cracker is a classical, everyday object and its design has not much been rethought. While analizing its design an over-dimension was detected, its initial safety factor was 3,25 with a total mass of 316,93g. While optimizing topologically, the safety factor was reduced to 2,06 with a final mass of 204,97g.

Topological optimization offers the ability to reconfigure the shape of the nutcracker to achieve a lighter, more efficient, and resilient structure, using less material without compromising its functionality or safety. The analysis helps identify areas of stress, critical parts, and areas where the structure can be improved. This is accomplished through advanced Finite Element Method algorithms that discretize, compute and redistribute the material optimally for the determined forces and constraints.

In each design step the methodology was subdivided into various stages: Preprocess: mesh adjustment and physics definition; Solving: Von Misses stress analysis and displacement analysis; Postproccess: visualization and critical assessment of results mainly through graph convergence, a must in Finite Element Method (FEM) analysis, that ensures stability and accuracy in the solutions.

Personal Skills
FEM in CREO simulation and its design iteration, Graph interpretation, engineering assessment, Rendering in KeyShot.

Type
University Project, Structural Simulation

Time
3 weeks

Team
3 members

Postprocess and final design

After several design iterations, the final design counts with a reduction of -29,75% mass, +0,588mm displacement, and an optimized safety factor of 2,06.

Solving

Von Misses and Displacement Structural Simulations

The study begins with the definition of physics. The Forces and Constraints that bound the study. A compression test was conducted and the most disfavorable resistance case was taken as the maximum resistance the nut could offer. The ultimate forces were calculated using the lever law. The main restrictions are pin type in the fulcrum and the planar caused by the nut.

Preprocess- Physics Definition

Study of forces and constrains

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