Local reinforcement method for fiber composite material workpiece
A fiber composite material and local reinforcement technology, which is applied in the field of fiber composite materials, can solve the problems of low reliability of the reinforcement structure, poor reinforcement effect, and low work efficiency, so as to improve the reinforcement effect and work efficiency, Significant fiber savings and weight reduction effects
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Embodiment 1
[0032] In this embodiment, the fiber composite material part is an open-hole carbon fiber / epoxy resin composite material laminate prepared by eight layers of Toray 12K T700 carbon fiber twill cloth. The composite material laminate bears a uniaxial tensile load, and its structure and the The direction of tensile load is as figure 1 As shown; the part to be reinforced is the opening part of the open-hole carbon fiber / epoxy resin composite laminate, and the hole diameter of the opening part is Φ14mm; the reinforcement piece 4 is made of Toray 12K T700 carbon fiber wire not impregnated with matrix resin bundle preparation, the reinforcing sheet 4 and the preform 3 of the perforated carbon fiber / epoxy resin composite laminate Figure 4 The integrated curing RTM molding process shown in the figure obtains an open-hole carbon fiber / epoxy resin composite laminate with reinforced openings. The specific method includes the following steps:
[0033] Step 1. According to the uniaxial te...
Embodiment 2
[0051] In this embodiment, the fiber composite material part 1' is an open-hole carbon fiber / epoxy resin composite laminate, and its structure is as follows Figure 5 As shown; the part to be reinforced is the opening part of the open-hole carbon fiber / epoxy resin composite laminate. The reinforcement sheet 4 is prepared from Toray 12K T700 carbon fiber tow not impregnated with matrix resin, and the reinforcement sheet 4 passes Figure 8 The secondary curing vacuum-assisted resin injection molding process shown is cured on the opening of the open-hole carbon fiber / epoxy resin composite laminate to obtain an open-hole carbon fiber / epoxy resin composite laminate with reinforcement at the opening. The specific method includes the following steps:
[0052] Step 1. According to the uniaxial tensile load of the carbon fiber / epoxy resin composite laminate, analyze the force of the opening part of the composite laminate, determine the main load direction of the opening part, and dete...
Embodiment 3
[0066] In this embodiment, the fiber tow not impregnated with resin is used to prepare the reinforcement sheet, and the reinforcement sheet and the preform of the fiber composite product are subjected to Figure 9 The integrated curing vacuum-assisted resin injection molding process shown in the figure can obtain partially reinforced fiber composite parts. The specific method includes the following steps:
[0067] Step 1. Carry out force analysis on the part to be reinforced, determine the main load bearing direction of the part to be reinforced, and determine the geometric shape and size of the part to be reinforced, and then design the reinforcement piece 4 so that the reinforcement piece 4. The trajectory of the fiber tow is consistent with the force bearing direction of the part to be reinforced, and the geometric shape and size match the part to be reinforced;
[0068] Step 2, using the fiber tow not impregnated with the matrix resin according to the fiber tow track, geo...
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Abstract
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