However, during long-term operation, new defects and cracks will be formed on the surface of the material, which will promote the initiation of fatigue cracks, which will lead to a decrease in fatigue life. Therefore, 51CrV4 spring steel is employed in parts used for bearing, buffering and steering during operation. Therefore, the significant change in fatigue life is controlled by the MGF and stress triaxiality.Īs the material of high-speed train bogies, 51CrV4 spring steel has the advantages of high strength, high fatigue resistance and low overheating sensitivity. This decrease in dislocation density leads to an increase in the stress concentration and accelerates the crack growth rate, decreasing the fatigue life. Moreover, according to focused ion beam-high-resolution transmission electron microscopy (FIB-HRTEM) microstructural analysis near FCIPs, under a higher stress triaxiality, the crack tip area is subject to greater stress constraints, making the multiplication and movement of dislocations in this area more difficult, resulting in the decrease in movable dislocation density. The magnitude of this peak fatigue life is related to the change in the stress triaxiality. However, when the FCIP further shifts towards the centre of the specimen, the stress triaxiality experienced by the fatigue source gradually increases, which results in a peak in the curve of FCIP versus fatigue life. When an FCIP shifts from the surface of the sample to the interior, the fatigue crack initiation resistance on the interior is greater than that on the surface, which leads to an increase in fatigue life. The results show that the fatigue life of steels first exhibits an increasing tendency and then a decreasing tendency with increasing distance between an FCIP and the surface. Subsequently, the fatigue behaviour of steels with different FCIPs is systematically studied. Different modified gradient fields (MGFs) are prepared on the surface of 51CrV4 spring steel components by an ultrasonic assisted surface rolling process (USRP).
Racerender cameras software#
Using the software does require some knowledge of video editing, its slightly more difficult than Adobe Premiere Elements but its not difficult.In this paper, the effects of the fatigue crack initiation position (FCIP) on fatigue life are discussed. A good suction cup mount is also needed of course (the Gopro brand one is extremely solid, go with that if you can). I used a Gopro based mount so I could use my Gopro mounts to mount the phone in the car.
Racerender cameras android#
Your Android device can record the video itself, but you will need a mount for it. But you can use any action camera or digital video camera you wish to record video.
The Gopro I went with was the HERO5 Session which offers 4k video and a smaller size than the standard Gopro, but no removable battery. RaceRender 3 Video+Data by HP Tuners | Features To combine the video together, use RaceRender 3 Ultimate ($50): TrackAddict for iOS & Android by HP Tuners The app that you need is "Trackaddict" which is free in the Google Play store:
Racerender cameras Bluetooth#
To get the data from your OBD-II, you need a bluetooth connector. To record the data, you need an Android device with Bluetooth and Wifi (I'm using a Galaxy S7) and also a video camera.
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