Factors Affecting Swelling Performance of Metal Airbags
The metal airbag has become a research hot issue in the design of dynamic deformation and shock reduction structures of various spacecraft because of its high strength,good air tightness and envi-ronmental adaptability,as well as better shape stability,This paper mainly studies the key parameters that lead to fracture or fold instability during the inflation process of airbags,and also analyzes the influ-ences of the location of the air inlet and the thickness of the balloon edge on the swelling effect.With the finite element simulation method,the five groups of commonly used metal material parameters are selected as the basic data to carry out the orthogonal experiments on material density,Young's modulus,Poisson's ratio and yield limit.The simulation results show that the maximum expansion height of the metal airbag is most affected by the material density,and the range is 8.26 mm.The maximum fold depth is most af-fected by the yield limit,with a range of 5.48 mm.The number of folds is least affected by the yield lim-it,and the range is only 0.8.The location of the air inlet will affect the uniformity of the balloon expan-sion,but will provide a larger expansion height in a specific area.Increasing the edge thickness will en-hance the strength of the airbag,but reduce the maximum expansion height of the airbag.This conclusion can provide theoretical reference for engineering design of metal airbag.
metal air bagmaterial parametersorthogonal experimentswelling effect
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