Standardized development of SMA-based products using the VDI 2248 guideline

Despite the many advantages, only a few products based on shape memory alloys (SMA) exist on the market. One reason for this lies in the complex properties of this alloy, which product developers often have problems with. In particular, standardization is therefore an essential factor for better dissemination of this technology. The series of guidelines of the Association of German Engineers (VDI) 2248 "Product Development with SMA" therefore supports the user in the functional design of technical solutions with SMA. In order to provide users with a structured explanation of this technology, the guideline is subdivided into six different guideline parts (sheets).

Sheet 5 "Development Methodology", presented in this paper, supports engineers in the methodical development of products based on shape memory alloys. The included instructions and methodical tools are important recommendations for a successful product development. Especially the structured procedure with defined quality gates is crucial for the handling of the complex properties of this technology. The error in developing SMA-based products is often in the detail. For example, the fastening technology of pull wires in terms of fatigue behavior plays a very important role. Especially on these points, the guideline draws the attention and provides assistance. The development methodology described in the guideline refers to SMA actuator systems and forms a part of a holistic product development process. The development of the complete marketable product requires the application of furthermore general guidelines, such as the guideline VDI 2206 "Development of mechatronic systems" or VDI 2221 "Product development processes".