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Fractography aids study of tire tread separations

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Executive summary

In-service catastrophic radial tire failure is often a separation of the tread and outer steel belt from the tire casing and inner steel belt. These separations generally occur in the field at high temperature and high speed. Forensic analysis of the resulting failure surface appearance, or fractography, can be very helpful in determining the origin and progression of the tire tread separation.
Surfaces corresponding to the gradual cracking of the skim rubber along the edges of the belts, initiation of a belt-leaving-belt separation, high-speed tearing and termination of the separation are described. Examples of surfaces made in laboratory-created separations are compared to similar surfaces found on field-failure tires. The fractography shown provides the tire failure analysis a catalog of comparative surfaces that are useful in determining the evolution of failure in a given tire.

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Nguồn: Quốc Anh, Cao su Đức Minh

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