Structure and process integrated design method for FRP structural part

A design method and technology of structural parts, applied in the direction of design optimization/simulation, calculation, special data processing applications, etc., can solve the problems of lack of theoretical methods, inability to guarantee the optimal structure of the design structure, etc., achieve high economic benefits, and improve optimal design Effect of efficiency, high material utilization

Active Publication Date: 2018-11-16
TONGJI UNIV
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Problems solved by technology

However, this technology is based on the accumulation of engineering experience for structural design, lacks the support of theoretical methods, and cannot guarantee that the design structure is the optimal structure

Method used

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  • Structure and process integrated design method for FRP structural part
  • Structure and process integrated design method for FRP structural part
  • Structure and process integrated design method for FRP structural part

Examples

Experimental program
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Embodiment

[0105] This embodiment performs high-precision finite element modeling on a certain engine cover, such as figure 2 shown. In the bonnet, the inner and outer panels are made of carbon fiber reinforced composite material (CFRP), and the rest of the reinforcement panels are still made of original steel materials.

[0106] Select 0°, ±45°, and 90° as the four alternative angles of the CFRP engine cover, and generate the constitutive matrix of the four alternative angles. The CFRP engine hood inner panel is selected as the design domain for optimal design. The initial design of the inner panel of the CFRP engine hood adopts 16 layers of CFRP unidirectional belt laminate, and the outer panel is composed of 5 layers of CFRP. Among them, the outermost layer of the outer panel is laminated with orthogonal woven fabric for the sake of appearance.

[0107] The finite element analysis is carried out for the torsion, forward bending, backward bending and lateral stiffness conditions of ...

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Abstract

The invention relates to a structure and process integrated design method for an FRP structural part. The structure and process integrated design method for the FRP structural part comprises the stepsof: (1), establishing a finite element model of the FRP structural part, performing parameterization of layer angle and layer thickness design variables, and establishing a material interpolation model; (2), performing finite element analysis on the structural part, extracting parameters required for calculating the sensitivity, and establishing a target function and a constraint condition on layer angle and total thickness design variables; (3), calculating the sensitivity of the target function and the constraint condition; (4), according to the sensitivity, iterating to obtain the optimalsolution of the target function by adopting a mathematical programming method, and updating a parameterization model of the layer angle and total thickness design variables; and (5), repeating the steps (2) to (4) till the result is converged or is up to the maximum iteration number, so that the optimal layer structure of the FRP structural part is obtained. Compared with the prior art, the structure and process integrated design method for the FRP structural part in the invention has the advantages that: structure and process integrated design is realized; and, on the premise that performancerequirements and manufacturing constraints are satisfied, the material utilization rate and the optimization design efficiency of the FRP structural part are effectively increased.

Description

technical field [0001] The invention relates to a design method of a composite material structural part, in particular to an integrated design method of a structure and a process of an FRP structural part. Background technique [0002] Fiber composite materials have the advantages of high specific modulus, high specific strength, corrosion resistance, good fatigue resistance, good shock absorption, and low density. In addition, fiber composite materials have good formability and strong designability. By changing parameters such as fibers, matrix types, fiber volume fractions, layup angles, layup thicknesses, layup sequences, and structural topology, structural parts can be used in actual use. Engineering performance requirements, such as stiffness, strength, mode and other performance indicators. The strong designability of fiber composite materials makes them have great potential in lightweight, and has been widely used in disciplines such as aerospace, automobile industry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 高云凯徐亚男吴驰
Owner TONGJI UNIV
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