Method for predicting curling driving torque of foldable composite material pod rod

Abstract

The invention relates to a method for predicting the curling driving torque of a foldable composite material pod rod, which comprises the following four steps of: 1, defining the geometrical shape and the size of the foldable composite material pod rod, and determining a mathematical expression of the relationship among the geometrical parameters; secondly, axial compression load is applied to the foldable composite material pod rod in the first step, and strain energy stored in the process that the foldable composite material pod rod with the unit length is changed from the initial state to the completely-flattened state is obtained through the energy principle; thirdly, bending moment is applied to the foldable composite material pod rod which is completely flattened in the second step, and strain energy stored in the curling process of the foldable composite material pod rod which is completely flattened in unit length is obtained based on the classical laminated plate theory; and 4, adding the strain energy in the step 2 and the strain energy in the step 3 to obtain the strain energy generated in the folding process of the foldable composite material pod rod in unit length, and determining a curling driving torque through an energy principle.

Description

technical field [0001] The invention provides a method for predicting the curling driving moment of a foldable composite material pod rod, which belongs to the field of manned spaceflight. Background technique [0002] Due to the characteristics of light weight, high stiffness, high folding efficiency, and reliable unfolding process, foldable composite pod poles have received extensive attention and research in the aerospace field and have good application prospects. The foldable composite pod pole is usually made of carbon fiber resin matrix composite material, which is a thin-walled tubular rod structure that can be folded and unfolded. When it is folded, a curling driving torque is applied at both ends of the reel to roll up the foldable composite material pod rod to form a folded state; while when unfolded, the foldable composite material pod rod can rely on its own elastic strain energy to return from the folded state to the unfolded state. As a key mechanical performa...

AI Technical Summary

Problems solved by technology

Experimental means to directly measure the curling driving torque of the foldable composite pod rod is expensive, and the test process is easily affected by many accidental factors

The finite element numerical simulation method needs to establish a complex finite element model, the calculation is complicated, the calculation efficiency is low, and the calculation accuracy is difficult to guarantee

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