Abstract
In view of the heavy dump truck occurred cargo body floor cracking problems in the process of using, this paper established cargo body finite element analysis (FEA) model with the shell elements as basic element, and calculated the strength of the cargo body floor by using the Hyperworks (a FEA software). The results of finite element analysis indicate that the crack took place because the stress of the connection of floor and support beam of front plate and the connection of floor and backing plate of turnover bearing was close to or exceed the material yield strength. On the basis of the calculation, we worked out the causes of the abnormal floor crack, which accord with the actual crack case. According to the requirement of practical process, the structure of floor was improved, thus the maximum stress value decreased 30% and 80.9% at two positions respectively, compared with the original structure, this shows that the improved method is effective.
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