| This paper mainly investigates the experimental conditions and geometrical parameters of lightweight thin-tube packed structures. The important influences of the experimental conditions and geometrical parameters on the transfiguration mechanism and energy absorption are studied by static compression experiment and finite element software. It is found that lightweight structures have many unique virtues relative to the entitative structures from the stress-strain curves of experiments and finite element results, such as light weight, small density, excellent energy absorption and etc. They are widely used in many fields as energy absorbers to dissipate the kinetic energy during an emergency such as a collision. These mainly apply to automobile, ship, aircraft, railway, packaging and etc.There are four chapters in this thesis. In the first chapter, the thesis first expatriates the basic conception, artifactitious method and performance of porous material, and then simply retrospects the historic representative research about the mechanic performance in this field internal and abroad and puts forwards own research thought and content of the present thesis.In chapters two and three, the author mainly researches the mechanical properties of the packed lightweight structures( including two-dimension and three-dimension structures of pp, copper and stainless steel these three pipe material) with deferent packed ways, diameter and thickness of the tubes at deferent loading speed and gets the strain-stress curves and structure distortion condition by static compression experiment. It is found lightweight structures of the packed thin walled-tubes have superior absorption performance.In chapter four, the calculational results are given based opn non-lineary finite element software ABAQUS. The stress-strain curves and distortion at implement loading are also given. The results of finite element analysis grees well the experimental observations.
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