Different customer always different duty cycle for qulification test. Has anyone analyzed the severity of duty cycle?
This topic is so braod and the OEMs do not talk about it. It is considered to be core competence.
You hardly find material. Check the publications of Patrick Stenner (mostly in German)
Normally the accelerated life testing is based on duty cycle. The severity of duty cycle is related to application requirements. For example, the severity for urban bus application is related to stop and go. In this application, the clutch and synchronizers are extremely required. For off-highway, we have for example vibration and contamination. For highway, temperature... and so on... So, for accelerated life testing, is extremely necessary analyse and run the duty cycle under a real application and their severities.
Thank Antonio. You are right. The real application is footing stome for qualify the fatigue capability. But if we want to do accelerated life testing (ALT), it is unavoidalbe to simplify the duty cycle. Due to different technical approach or commercial strategy, ALT of each auto manufatour is significant different. I don't know whether there are some standards to classify or organize it. At least, OEMs can understand and compare the severity of each duty cycle.
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