Dr Anton du Plessis

Author's details

Name: Anton Du Plessis
Date registered: November 21, 2013

Latest posts

  1. Step by step microCT scan process — November 10, 2017
  2. Metal casting analysis — August 3, 2017
  3. Medical implant testing — August 2, 2017
  4. Analysis of 3D printed parts — August 2, 2017
  5. Insect analysis — March 28, 2017

Author's posts listings

Nov 10

Step by step microCT scan process

Here are some photos of a typical scan process, in photo steps: Step 1: Load the sample in some low density mounting material – the sample is a concrete of undisclosed origin, and the project will not be discussed here \ Step 2: load the sample into a rod or cylinder Step 3: open the …

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Aug 03

Metal casting analysis

Metal castings typically contain porosity which can affect the strength and lifetime of the part. Excessive porosity can be reduced by optimizing the casting parameters, and the best way to do this is to visualize and quantify defect sizes by X-ray microCT. It is also possible to routinely check castings to ensure nothing changes in …

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Aug 02

Medical implant testing

X-ray microCT is nondestructive and therefore is used for testing produced parts for porosity or inclusions (defects) and sometimes for wall thickness or deviation from CAD design. All these types of analysis can be used to assess a part before implanting it into a patient. We provided this service for a recent implant patient who …

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Aug 02

Analysis of 3D printed parts

This example shows a typical microCT analysis of 3D printed parts. 3D printing and additive manufacturing technologies differ widely and quality control of these parts are very important. In this example, Markforged parts were scanned of the following types: 1. Nylon 2. Short fibres in onyx plastic 3. Long fibres in nylon Here is a …

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Mar 28

Insect analysis

In this example a stag beetle is imaged, especially with a nice video. Image analysis and visualization done in VGStudioMax 3.0 Video: stag beetle new

Jan 16

Fossil or rock?

In this interesting challenge we are asking you, the public, to help us. A private anonymous collector found what looks like a fossil, possibly the skull of an animal. Have a look at the videos below and let us know if you think you know what it is. rock-rotate clipping MicroCT scan done in 2 …

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Aug 01

X-ray image quiz

The quiz for March is this one, can you guess what is X-rayed here: The last solution was: a tensile specimen, in this case 5.5 mm diameter round gauge 20 mm in length, with Ti64 alloy with internal pores visible in the X-ray image. The latest X-ray image solution: a venomous snake fang. Why was …

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May 31

Image based simulations: fluid flow in wood microstructure

This example showcases the capability of high resolution 3D images combined with simulations. A nanoCT scan of wood microstructure was used as basis for a simulation of fluid flow, taking as input parameters water viscosity, sealed edges and a pressure difference from top to bottom through the wood. The simulation then provides visual and quantitative …

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May 31

Reverse engineering of a shoe

This demonstration shows how a shoe can be scanned and internal dimensions extracted in the form of a STL file, suitable for CAD programs. Engineers could use this to test their designs and to compare how a new and worn shoe differ, or how different shoes differ in internal geometry, which is where it counts. …

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Mar 24

3D imaging of a wasp hive

We scanned a wasp hive and found some interesting contents, which is a nice example of the non-destructive imaging capabilities of microCT. The 5 wasps are coloured for visual impression and all have been dead for a few months prior to the CT scan. Watch a 3D video of this example (link below the images). …

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