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Prediction of Clamp Loss for Sunroof Mountings under Vehicle Operating Conditions
Technical Paper
2021-01-0796
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE WCX Digital Summit
Language:
English
Abstract
A vehicle fitted with a sunroof has structural challenges due to the mountings of the assembly with the Body-In-White parts. The major challenges include water leakage, noise and durability issues. This results in warranty issues and cost penalties for the Original Equipment Manufacturer. The focus of this paper is to address the challenges due to the mounting issues in the sunroof. The clinching process of the sunroof panels results in the reduction of the contact area for the clamping process. This reduction could result in bolt slippage either during the assembly of the vehicle or during the operating conditions. The sunroof module is also prone to cracks and bulging, due to bolt slippage.
The Virtual engineering simulation used in this study represents the clinching process and the variations in the surface of the body panels. In addition, the clamping of the Body-In-White to the sunroof module is represented for the assembly torque considering the frictional characteristics. Suitable material curves are used for the sunroof module. The operating conditions of the vehicle is considered. The effect due to road loads is considered in the simulation process in addition to the clinching and the clamping process.
Generic and Extracted Accelerations from the Road load is used as the input for the virtual simulation. Solutions are provided to the slippage of the bolts considering the clinching, clamping and the operating conditions.
Authors
Citation
Srinivasan, S., Mahadule, R., Koduri, R., and Palamalai, R., "Prediction of Clamp Loss for Sunroof Mountings under Vehicle Operating Conditions," SAE Technical Paper 2021-01-0796, 2021, https://doi.org/10.4271/2021-01-0796.Also In
References
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- Mucha , J. Clinching Technology in the Automotive Industry The Archives of Automotive Engineering 76 2 75 94 2017 10.14669/AM.VOL.76.ART4
- Pandi , S.K. , Elango , C. , Appana , K.R. , Mahadule , R.N. et al. Fatigue Life Prediction of HVAC Pipe Assembly for Measured Powertrain Load by Virtual Simulation SAE Technical Paper 2020-01-0188 2020 https://doi.org/10.4271/2020-01-0188