| Summary: | 碩士 === 元智大學 === 機械工程學系 === 105 === This study mainly aimed at the design of a finite element analysis (FEA) system applied to the steel cargo packing boxes which are carried in the shipping containers. The system is characterized by designing a user friendly man-machine interface so that the users do not need to learn the complex FEA software, such as those stress and deformation can be analyzed.
This kind of steel cargo packing box, if not carefully analyzed for its loading stresses, may cause deformation during shipping and that often result in the damage of the goods inside. Thus, it is necessary to examine the stress through the experimental and finite element analysis processes. In the experimental part, it measured the Young's modulus and the yield strength of different thickness steel strips to understand the basic properties of the raw materials. Then take the four-point bending test to measure the stress and bending resistance of different forming sections of the steel strip used on the box structure. These properties are the basis for calculating the safety factor under the loading stresses. In the dynamic verification of the packing box stress, the load of 1 ton under the conditions while driving on the rough road was tested. The instantaneous strain of the structure were measured and recorded by using the data collection system. The corresponding data can be used to calculate the dynamic safety factors of the packing box structure. Furthermore, in order to understand the stress/deformation of the whole box structure under the load, the finite element stress analysis of the box under the load of 1 ton is carried out at the same time. The results are compared with the experimental data so that design improvement can be done with the FEA.
Through the above analysis and experimental steps, the short-term benefit can be achieved by finding the weak point of the box structure, and then improve the design effectively to solve the problem. A long-term goal is to establish a user friendly CAD / CAE system, mainly by using the CATIA software to create an automated CAD/CAE system packing box development system, so that users do not have to learn the finite element analysis software, yet can understand the safety factors of the box structure strength. By improving those where weaker in the safe factor, the inferior structure design in resulting damage to the cargo can be avoided. Meanwhile, it also can reduce the development and manufacture time as currently used through the trial and error based on individual experiences, which cannot fully ensure the safety of the packing cabinet.
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