China3D printingNet April 23, researchers from Purdue University and Sandia National Laboratory have used3D printingThe machine developed a new way to understand how and when structural cracks formed. The research paved the way for remote detection and prediction of cracks.
The ability to detect and predict cracks is essential to improve the safety and efficiency of mining, natural gas operations, and nuclear waste. However, the researchers say it is also important to understand the structural integrity of 3D structures (such as bridges and human habitats on other planets).
Professor Pyrak-Nolte uses 3D imaging technology to work on this project.Picture from Purdue University
3D printingHow to bring a breakthrough
At the beginning3D printingPreviously, scientists such as Purdue professor Pyrak-Nolte and student Liyang Jiang had to experiment on natural rock samples, or use mineral water and powder to make castings to make rock samples. However, because each type of rock has different characteristics and characteristics, the results obtained using this method cannot provide a reliable basis for determining the cause of the fracture. One of these characteristics is the direction of its “mineral structure” or the organization of the mineral components that make up rock layers and strata.
In order to produce scientifically valid results, researchers can conclude that these rocks need to have the same characteristics and the same mineral structure.The researchers made3D printingThe rocks are used in their experiments so that they can control all aspects of the artificial rocks and make them exactly the same. By placing these rocks under pressure, the research team discovered patterns that allowed them to identify rocks based solely on the response of mineral fibers to the applied stress.
“Due to the new3D printingTechnology, we are able to test rocks and collect repeatable results. We can design shapes of various sizes, which is much more accurate than using natural rock or rock castings. “The researcher said.
In a similar way to rocks, layer structures are also used3D printingOf the substance. In this case, the researchers used 3D Systems ProJet CJP 360 3D printingMachine to produce artificial gypsum rock, the imitated layer is similar to the naturally formed rock.
In order to make rocks,3D printingThe machine uses binder spray technology, which involves laying down a layer of heavy mayenite powder, spraying the adhesive on it, and then laying a layer of heavy mayenite powder on it. This process causes the powder to react with the water-based binder solution, creating a layer of gypsum sample bound by gypsum crystals.
By printing various samples of mineral fabrics with different orientations and subjecting them to pressure, the team began to notice patterns in the way they broke. The research team found that they only need to look at the type of crack, the shape or smoothness or ripple of the rock, to determine which sample broke.
Pyrak-Nolte said: “The key idea is that if we understand how the ripples are generated, we can remotely predict the geometry of the fracture and the preferential flow path of the fluid by just looking at the rock sample.”
Purdue University and Additive Manufacturing
Purdue University owns and uses3D printingA record of overcoming technical challenges.For example, in August last year, the university entered the finals of a GE sponsored competition, which required the team to design innovative3D printingMetal radiator to effectively cool electronic equipment.
In addition, researchers from the University’s School of Mechanical Engineering published a study in early March detailing the traceability3D printingDevelopment of micro robots. Although other micro-robots are limited in application due to their small size, the new micro-robot patterning method adopted by the research team is expected to make it suitable for biomedical applications.
Pharmaceutical companies are also leveraging the expertise of Purdue University, and Aprecia Pharmaceuticals announced a partnership with the University School of Pharmacy earlier this month.Their cooperation will focus on developing future3D printingPharmaceutical equipment and drugs, and bring together teachers, research scholars and students to participate in research cooperation.
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