(Received 23 August 2012; accepted 12 September 2013)
Published Online: 2014
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Using two types of automobile transmission assemblies, a novel running-in specification with strengthening effects is proposed and investigated by the strengthening of low-amplitude forces below the fatigue limit. The phenomenon is also referred to as understressing or coaxing. In this novel running-in specification, the fatigue life will be prolonged and the assembly cost is unchanged. The average fatigue life of one transmission assembly was increased ∼40 % when the original running-in force was replaced by the optimal strengthening force in the new running-in specification. The average fatigue life of the other type of transmission assembly was improved ∼26 % when the estimated optimal strengthening force was applied in another new running-in specification with the strengthening effects.
Univ. of Shanghai for Science and Technology, Shanghai,
Stock #: JTE20120257