Abstract: This study is about the simulation of complex engineering systemsοΏ½ damages with auxiliary of neural networks. We start off with a brief definition of details. We will discuss the use of neural networks in determining the conclusions of the study. A detailed definition of semi-trailer, which is the machine in study, will also be given. The study then moves on towards the main body of the study which will discuss in full details of the damages done on a semi-trailer. The analysis is being done using neural networks to analyze this complex phenomenon and to study the operation analytically. The discussion is ended by a conclusion that clearly indicates advantages, limitations and possible applications.