Quantitative evaluation of induced porosity reference samples implemented by drill hole in CFRP using XCT and various segmentation parameters

Outline

G. Rao, B. Plank, C. Heinzl, J. Kastner - Quantitative evaluation of induced porosity reference samples implemented by drill hole in CFRP using XCT and various segmentation parameters - ECCM17 - 17th European Conference on Composite Materials, Munich, Deutschland, 2016, pp. 1-11

Abstract

Determination of porosity in carbon fibre reinforced polymers (CFRP) using X-ray computed tomography (XCT) is an important reference method for quality control in aerospace industry. The main objective of this work is to create reference samples of carbon fibre reinforced polymer (CFRP) and evaluate porosity quantitatively using X-ray computed tomography (XCT). Artificial porosity was induced in three nonporous CFRP laminates by multiple cylindrical holes drilled with a diameter of 200 and 300 μm. These plates were arranged in different permutations to obtain various combinations of a pre-determined void content. The combinations of CFRP plates were scanned using XCT for porosity determination. The diameters of the drilled cylinders implanted were measured with voxel size of 5 μm3 XCT scans with an accuracy of 295 ± 2.75 μm and 196 ± 2.75 μm to obtain reference porosity limits. The reference samples results show a void content ranging from 0.96 up to 4.81vol. %.