Abstract
This paper considers the use of martensitic NiTi shape memory alloys (SMAs) for technical applications in drive technology with a focus on bearing and gear technology. Within bearing technology, SMAs can be applied for the clearance adjustment of taper roller bearings using the extrinsic two-way effect. First constructive solutions show the axial motion of the outer ring to compensate the decreasing axial clearance as a result of different temperatures between shaft and housing. To compensate different thermal expansions SMAs offer improvements using the extrinsic two-way effect. With the help of steel springs the external load the SMA is working against can be realized. With given information about the stress–strain behavior for NiTi SMA under axial compression the necessary forces and compressions to reach the demanded elongations can be calculated.
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