Dump trailers serve as key transport tools for construction, mining and municipal projects, and cargo-related wear is the main factor that affects their service lifespan, operational stability and daily maintenance expenses. In actual working scenarios, trailer body damage is mainly caused by three interactive wear patterns: surface abrasive friction, repeated impact fatigue and chemical erosion. Variations in the physical and chemical features of different cargos lead to huge differences in wear conditions. Hard ores and gravel pose the greatest damage, as their high hardness and rigid texture create strong abrasion and continuous impact, gradually wearing down the carriage plates, leaving surface scratches and even triggering structural cracks. Damp corrosive substances, including saline soil and industrial chemical leftovers, cause electrochemical erosion on the metal surface, which leads to overall material deterioration and pitting damage. Mixed construction waste with irregular particle sizes and inconsistent hardness often results in uneven local wear and partial structural damage. By contrast, soft soil and fine sand only create slight, even friction on the carriage surface, bringing almost no severe damage. In general, the wear intensity from highest to lowest is hard mineral materials, corrosive cargos, construction waste and soft earth materials.
Reasonable improvement designs and routine maintenance work can effectively reduce trailer body wear and prolong the service life of dump trailers. For material selection, wear-resistant steel plates are the best choice for transporting hard mineral cargos, while anti-corrosion coating treatment is necessary for vehicles carrying corrosive materials. Ordinary carbon steel is fully competent for conventional earthwork transportation and helps control equipment costs. In terms of structural design, optimizing the corner transition of the carriage, installing wear-resistant lining plates on vulnerable areas and adding bottom drainage structures can greatly reduce impact damage, local friction and chemical corrosion. Meanwhile, daily upkeep such as timely cleaning of residual cargos, regular inspection of body structures and regular anti-rust maintenance can slow down the aging and wear of the trailer body. To sum up, the physical and chemical attributes of cargos directly decide the wear characteristics of dump trailer carriages. Matching targeted material selection, structural modification and scientific maintenance schemes with different cargo types can minimize wear loss, guarantee safe operation and cut down long-term equipment maintenance costs.
