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Outline
Addressing the issues of brake efficiency degradation and thermal fatigue cracking due to temperature rise in automotive disc brakes, this paper provides a systematic review of research advancements in temperature field analysis, fatigue life analysis, and heat dissipation structure optimization. It delves into the temperature field characteristics of brakes, uncovers the mechanisms behind thermal fatigue failure in brake discs, compares various heat dissipation methods for brakes, and summarizes optimization techniques for friction pair structures. The temperature rise of the brake is influenced by the driving conditions. The highest temperature of the brake disc is concentrated in the sliding area of the friction pair. The temperature field is strongly coupled with the stress field, and thermal stress induces thermal fatigue, which manifests macroscopically as cracks, while microscopically, it promotes crack propagation due to pre-existing defects. The primary heat dissipation mechanism is air convection, and forced cooling needs to be optimized for the optimal operating temperature. Optimizing the dimensions of the friction lining and brake disc, and improving the ventilation structure can significantly reduce temperature rise and extend service life.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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