Applications of Micro-CT for Tensile and Compression Testing

 

Mechanical properties and fracture propagation of Longmaxi shale loading under uniaxial compression at different load stages. (a) σ1= 127.32 MPa; (b) σ1= 151.19 MPa; (c) Fractured specimen (after σ1= 155.76 MPa). Energies, Zhou, Minyue, et al, 31 May 2018,

measuring the force required to elongate or compress a specimen to the breaking point, material properties can be determined that will support research in many fields, including additive manufacturing, geology, dental, bone, composites, and more. By the use of mechanical testing stages.Micro-CT offers researchers the opportunity to study changes in a sample’s microstructure when a controlled load is applied during the scan. Many performance parameters can be measured with tensile or compression testing, demonstrating that micro-CT is a valuable means to better understand what internal (and invisible) changes are contributing to how materials and products will behave in their intended applications.

Mechanical Property Measurements and Fracture Propagation Analysis of Longmaxi Shale by Micro-CT Uniaxial Compression

Organic-rich shale is of interest to the petroleum industry for its gas-bearing properties and associated prospects of massive gas reserves. Among other qualities, its low porosity and permeability greatly increase the difficulty of gas extraction. New techniques, such as hydraulic fracturing and horizontal drilling, have significantly promoted gas production and benefit from the study of the mechanical properties of shale at multiple scales. “The understanding of fracture generation and propagation with different bedding orientation remains a key step to successful well drilling.”

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Mechanical characterization of porous structures by the combined use of micro-CT and in-situ loading

“In order  to  understand  and  simulate  the  behaviour  of  porous  materials  during  mechanical loading,  a  thorough  knowledge  of  the relationship  between  their  morphology  and  mechanical behaviour on the one hand, and the failure mechanisms on the other hand is required.” Micro-CT’s non-destructive analysis is an excellent characterization technique to quantify the morpholog prior and during loading, to determine the mechanical properties in-situ, to analyze failure mechanisms, and to quantify the internal local strain distributions. This study demonstrates how the morphology can be linked to the mechanical properties and failure mechanisms to improve modeling and design in titanium alloys.

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In-situ tensile test under microtomography to characterize mechanical behavior of ethmoid bone: a preliminary study

The ethmoid bone, located deep within the skull base, has complex, labyrinth-like geometry that makes it difficult to understand its mechanical properties. It is important for surgeons to appraise the force range they can apply during endoscopic procedures and to know what kind of haptic feedback should be produced by a simulation device used for training. This study establishes a protocol of an in-situ tensile test under micro-CT to characterize ethmoid bone behavior.

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Micro-computed tomography: a tool to study the fracture behaviour of calcium phosphate cements

The use of micro-CT in bone microstructure analysis has increased because of its non-destructive 3D imaging at high resolution. Implants or materials for bone augmentation, such as calcium phosphate cements (CPCs) can be studied in the same ways. CPCs are brittle and not commonly used alone in load-bearing applications but it is important to understand their fracture behaviour under different loading conditions. This study investigates the use of  micro-CT imaging to “study the fracture behaviour of CPCs during compression and diametral tensile tests and to study possible correlations between mechanical and structural properties.”

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X-ray computed tomography of polymer composites

Stages allowing researchers to study samples under mechanical load offer almost unimpeded views of samples during scanning, enabling the investigation of composite behaviour in realistic service environments using in-situ experiments or time-lapse studies. The reported compressive strengths of carbon-fiber-reinforced polymers are often 60–70% of their tensile strengths, making composite components susceptible to damage under compressive loading. Micro-CT has “aided the design of compression-resistant composites by establishing relations between compressive properties/damage and microstructure.”

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Related Articles:

Micro-CT Imaging of Samples Under Mechanical Load

Applications for Reinforced Plastics

Applications of Micro-CT

Micro-CT Optional Stages

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