A vehicle typically consists of several thousands of spot joints such as rivets, clinch joints or spot welds. They are used to bond together different parts of the vehicle, for example the car bonnet. But the rivets are costly and do not have great strength. Moreover, spot joints require a certain sheet thickness to provide sufficient strength. At the same time, however, the automotive industry is keen to use thinner sheets, in order to build lighter vehicles and reduce production costs.

Read the source article at Phys.org

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