Building a better world through data

Windpact’s proprietary database of characterized open cell and closed cell foam materials gives us the ability to understand current polyethylene materials being used and determine if other materials in the industry would create an optimal solution in performance, weight, size, and cost. Material foam characterization is the process of measuring and determining physical, mechanical and impact properties of foam, understanding the interaction of materials for millions of possibilities (10x).

Digital Image Correlation is one of the techniques we utilize to determine key material characteristics

U.S. Army stock ECH pad vs a Windpact Crash Cloud

For example, this video illustrates a single pad impact comparing the U.S. Army ECH (enhanced combat helmet) polyethylene stock pad vs a Windpact Crash Cloud that has been optimized for the Army’s single pad evaluation test. The test impacts a pad at 10 ft/sec with a hemispheric anvil. Windpact’s engineering team was able to utilize multiple open cell polyethylene foam materials within the Crash Cloud to produce a solution that tested ~50% better than the stock pad. 

The Benefits of a Pedigreed Foam Materials Database

With Crash Cloud

Windpact’s Crash Cloud technology provides customers with impact absorbing pads whose performance can be custom-tuned for specific applications. Windpact is able to custom-tune the Crash Clouds for specific applications because we have developed a proprietary finite element model that is valid across a broad range of low, medium and high strain rates. The same proprietary knowledge that drives the accuracy of Windpact’s finite element model (FEM) can also be utilized by Windpact’s clients to improve the accuracy of their current modeling – even in non Crash Cloud situations. By licensing the Windpact proprietary material database, which includes various impact foam materials that have been characterized according to Windpact’s proprietary process, clients can improve the outputs of any simulations which incorporate foam components.

Without Crash Cloud

Foam materials tend to be one of the weakest links in sophisticated impact models. Great efforts have been made to develop and incorporate advanced material models for structural materials in impact applications but these efforts can be easily undermined, and the model’s output corrupted, if the system being modeled includes insufficiently characterized foam components. The superiority of Windpact’s material characterization can be readily demonstrated by comparing the output from a polyethylene foam impact simulation using the industry’s state of the art foam models and Windpact’s proprietary foam models.