CFRP Laminate with Delamination

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Plot of velocity magnitude – showing the beam profile

Model Description

This simple 2D model simulates an immersion B-Scan inspection of a CFRP laminate containing a delamination defect.

The model comprises of a CFRP laminate with 24 ply layers and thin inter-ply resin layers. The number of plies is variable and their orientation is read into the model from an external CSV file, allowing for different laminates to be simulated.

The simulated model area is reduced to allow for efficient simulations to be performed.

im2.png

Model geometry

Design Variables

The base model allows the following design variables to be adjusted. By default electrode thickness and SiO2 thickness are set as design variables to be swept (indicated by *).

Parametric Variable

Description

Default Value

tx_loc*

Location in x direction of transducer

10 mm

tx_freq*

Transducer center frequency

5 MHz

tx_rad*

Transducer radius

2 mm

tx_off

Transducer stand off from laminate surface

5 mm

nply

Number of ply layers

24

ply_thk*

Ply layer thickness

250 um

res_thk

Inter-ply resin layer thickness

10 um

def_cent

Location in x direction of delamination center

10 mm

def_len

Length of delamination

5 mm

def_ply*

Depth of delamination in terms of number of ply layers

16

 Outputs


The outputs from this model are:

  • Transducer received A-Scan signal
  • Maximum velocity magnitude to plot the beam profile

im4.png

A-Scan outputs from all simulations

im3.png

Constructed B-Scan (Cropped to laminate region)

Runtime Statistics

Degrees of Freedom

1,831,848

Solve Time

 74 secs (8 CPUs)

Core Hours

 0.84 (per simulation)

Memory Usage

 75 MB (per simulation)

 

Files

The following input files are required to run this model:

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