Coupling bionic model design and parameter optimization of grey cast iron truck drum brake
Publication Date
December 14, 2023
Creator
Abstract
With the growth of road transport scale, transport vehicles have more load, faster speed, increasing transport efficiency, overcoming harsh road environments and other changing trends, the safety of life and property face unprecedented challenges. The brake system is the security of transport vehicles, in which the drum brake is an important part of the truck braking system, in the truck braking by thermal fatigue and wear role to produce thermal fatigue cracks, resulting in drum brake failure, serious life-threatening, drum brakes and the material used in grey cast iron problems are increasingly prominent. Therefore, to improve the service life of the drum brake, improving the drum brake’s grey cast iron material resistance to thermal fatigue and wear performance has practical significance and significant application value.
The failure of grey cast iron truck drum brakes is a complex problem caused by multiple factors that cannot be solved by changing a single factor alone. Observations and studies of the surface characteristics of living organisms in nature have revealed that in order to adapt to nature, organisms have evolved a body surface structure with excellent functionality due to the combined effect of multiple coupled factors such as structure, material and morphology. In this paper, based on the principle of coupling bionics, the coupling bionic unit is prepared on the surface of grey cast iron by laser fusion, and the unit coupling element forms a "soft-hard" structure with the base material coupling element, the relationship between laser energy and drum brake wall thickness is investigated, the laser parameters for processing grey cast iron truck drum brakes are optimized, and the effect of different tissue grey cast iron base material coupling elements on the drum brake is analyzed. The influence of the coupling elements of different grey cast iron base materials on the laser coupling bionic treatment was analyzed, the degree of improvement of the coupling bionic units on the thermal fatigue and wear performance of grey cast iron with different structures was summarized, the influence of the morphological coupling element characteristics on the thermal fatigue and wear performance of grey cast iron drum brakes was investigated, a combined coupling bionic model for the failure characteristics of grey cast iron truck drum brakes was designed, and a number of coupling bionic grey cast iron drum brakes were trialled for bench testing.
Item Type
ethesis
Thesis Type
PhD
Supervisors
Subjects (LC)
Associated Schools / Departments
Department of Architecture and Built Environment (UK)
eprints ID
74616
UoN Repository URI
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Name
Dahui Yu Thesis.pdf
Type
Full-text
Description
Examined
Size
25.46 MB
Format
Adobe PDF
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