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Drop test simulation for packaged kitchen built-in stoves
Simulative study of the impact of falls on a built-in stove and its packaging made of EPS foam and shrink wrap.

Drop test simulation for safe packaging of home appliances

Sector: Consumer goods/durable goodsSpecialist field: Structural mechanics

BSH Hausgeräte GmbH uses Ansys simulation tools to develop optimal packaging to protect against transport damage. The effect of a fall on both the stove and the EPS packaging is analyzed with the shrink wrap used, which is applied under tension and then thermally treated.

Summary

Task

Properly designed packaging can mitigate the potentially damaging impacts and vibrations that occur up to the point of installation and can properly protect the product. For packaging and sealing goods, many industries typically use foam-based materials along with plastic shrink wrap. When developing a successful product, it is not only important to know how the design of the components affects the packaging system, but also vice versa.

Solution

The present work deals with the numerical simulation of a drop test of a stove with EPS foam and plastic shrink wrapping. In addition, the prestressing of the stove and the packaging, due to the thermal shrinkage of the plastic wrap, was taken into account in the numerical analysis.

Customer benefits

The simulation results from Ansys LS-DYNA are consistent with the experimental drop test results. The basis for an optimized process for product and packaging design has been created.

Project Details

Task

Unfortunately, it is common for consumer products to be subjected to mechanical impact loads on their way to the installation site, especially if they are dropped during transport or delivery. The ability to withstand such stresses is critical to the development of successful products such as those from Bosch-Siemens Home Appliances. In this regard, properly designed packaging can mitigate the potentially damaging effects of vibration and lessen the impact on the products protected by this packaging. To package and seal goods, many industries typically use foam-based materials along with plastic shrink wrap. When designing a successful product, it is not only important to know how the design of the components affects the packaging system, but also vice versa. Prestressing, due to the thermal shrinkage of the shrink wrap, is also very important and must be taken into account before a numerical drop test is performed.


Customer Benefit

The simulation results from Ansys LS-DYNA are consistent with the experimental drop test results. The basis for an optimized process for product and packaging design has been created.


Solution

The present work deals with the numerical simulation of a drop test of a stove with EPS foam and plastic shrink wrapping. In addition, the prestressing of the stove and the packaging, due to the thermal shrinkage of the plastic wrap, was taken into account in the numerical analysis. For this purpose, a simulation of the thermal prestressing of the plastic wrapping was performed before the actual drop test of the complete assembly was carried out. The permanent deformations of the stove near the impact point as well as the deformation of the packaging foam near the impact point were the focus of interest and were compared with experimental data. Ansys LS-DYNA was used to perform the drop test simulation of the stove as well as the thermal prestress simulation of the plastic packaging.

Images: © BSH


Managing Director
Dr.-Ing. Matthias Hörmann

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