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Automotive Engineering Commons

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Full-Text Articles in Automotive Engineering

Non-Destructive Testing Of 3d-Hybrid Components Using Air-Coupled Ultrasound, Wolfgang Adebahr, Marc Kreutzbruck Jan 2016

Non-Destructive Testing Of 3d-Hybrid Components Using Air-Coupled Ultrasound, Wolfgang Adebahr, Marc Kreutzbruck

Review of Progress in Quantitative Nondestructive Evaluation

The increasing use of hybrid lightweight structures in the automotive industry brings new challenges in the area of multi-material boundaries. Insufficient bonding quality between two kinds of materials, especially in highly loaded structures, affects the component’s performance. Hence, it is very important to monitor the bonding quality in multi-material structures. Flat specimen, consisting of sheet steel and organic sheet layers were examined using air- coupled ultrasound transducers in reflection setup. By slanted incidence of the ultrasound on the profile’s surface, guided waves were excited in the specimen and delaminated areas could be visualized due to changed phase values ...


Automated X-Ray Quality Control Of Catalytic Converters, N. Shashishekhar, Veselitza Jan 2016

Automated X-Ray Quality Control Of Catalytic Converters, N. Shashishekhar, Veselitza

Review of Progress in Quantitative Nondestructive Evaluation

Catalytic converters are devices attached to the exhaust system of automobile or other engines to eliminate or substantially reduce polluting emissions. They consist of coated substrates enclosed in a stainless steel housing. The substrate is typically made of ceramic honeycombs; however stainless steel foil honeycombs are also used. The coating is usually a slurry of alumina, silica, rare earth oxides and platinum group metals. The slurry also known as the wash coat is applied to the substrate in two doses, one on each end of the substrate; in some cases multiple layers of coating are applied. X-ray imaging is used ...


Acoustic Emission Detection Of Early Stages Of Cracks In Rotating Gearbox Components, Dan Xiang Jan 2016

Acoustic Emission Detection Of Early Stages Of Cracks In Rotating Gearbox Components, Dan Xiang

Review of Progress in Quantitative Nondestructive Evaluation

Many critical, highly loaded rotating gearbox components have fast crack propagation rates. Early detection of cracks in gearbox is critical to mitigating the risk of catastrophic failure. Acoustic Emission (AE) techniques have proven to be capable of continuously monitoring the crack initiation and propagation [1-3]. Due to the long distance of AE signal propagation from the AE sources to the sensors installed in the housing, the AE signal suffers from severe attenuation and noises. Accurate AE signal classification technology that is capable of extracting the true AE signal out of background noises generated by the surrounding environment of a gearbox ...