The Shield of Achilles: Greek Students Enjoy Learning Program Integrating 3D Printing Studies & Classical Studies

Angelopoulos and E. Solomou have authored ‘The Shield of Achilles using 3D Technologies to Support Teaching Scenarios of Homeric Epics,’ describing a recent interdisciplinary school program centered around the Homer’s Iliad, and an Informatics class. This new method of teaching occurred at the 1st Junior High School of Vrilissia, Athens (2017-2018 school year) as students aged 13-14 of the B grade created a 3D design project called ‘Shield of Achilles.’

It is a pretty well-known fact within educational circles that the need to involve more children in STEM learning is great. Classical subjects need more attention these days too, along with new and innovative teaching methods for teachers. Both types of studies complement each other perfectly:

“Students interested in classical subjects do not use scientific thinking, computational thinking, practice and methodologies based on the understanding of STEM subjects,” said the authors. “Also, students with interest in STEM subjects are less interested in classical studies which lessens their chances of developing comprehensive knowledge and literacy on issues such as history, philosophy, languages, religions, etc.”

The new learning program looks toward the year 2030 as teachers combine STEM, social science, humanities, arts, and classical disciplines; and while students who follow STEM-related careers usually end up with myriad options later, such classes are historically lacking in female students as well as the overall popularity desired by educators and prospective employers who would like to see the pool of prospective young graduates expanding for ongoing needs in the workforce.

“Connecting STEM and Classical subjects (Informatics and Ancient Greek in our case) is vital in ensuring that the general knowledge sector will benefit of much needed new talent in its various fields, and that students think and act not only like scientists-experts in their field, but also as integrated personalities, weighing evidence to draw conclusions, and learning how to navigate the claims bombarding us in our everyday lives,” stated the authors.

Model of the Shield of Achilles made by students in Layer view

The “Shield of Achilles” program is meant to offer the following:

  • Create a ‘community of practice’ between the STEM and classical learning disciplines
  • Implement integrated models
  • Monitor acquisition of skills, student participation and performance, and enthusiasm level of students

For the Informatics class, the students were able to work on an Ultimaker 2+ 3D printer that had been donated to the school two years previously. Students also learned how to use both Tinkercad and Cura as they fabricated their own Achilles’ shield, encouraged to ‘freely express themselves and produce their own creation’ in 3D.

Upon completing a questionnaire at the end, students and teachers expressing having fun, although students would have liked ‘subjects to be taught in an interdisciplinary way together with IT and the support of 3D printing and designing technologies.’ They did, however, enjoy the cross-teaching approach integrating 3D design and printing. Students also expressed having a ‘positive view’ about Ancient Greek.

“Since the implementation of the program, it has been shown that students’ interest in both IT subject and the cognitive subject of Ancient Greek, was highly increased. In particular, enhancing interest was much greater for weak students in both Homer’s Iliad and IT,” concluded the authors.

“The use of three-dimensional technologies can make cognitive subjects more attractive to students, enhance the quality of teaching subjects, increase students’ interest in them and acquire skills [13] such as: problem solving, digital skills, teamwork, communication with my classmates, learn how to learn on my own, etc., skills that are necessary to improve the personality and education of the students.”

3D printing within educational systems around the world is playing a large role in how students shape their perception of STEM learning, and consequent careers in related fields. Teachers and students are often able to learn together regarding new technology, and classrooms are producing everything from prosthetics for animals to robotics, and far more.

[Source / Images: ‘The Shield of Achilles using 3D Technologies to Support Teaching Scenarios of Homeric Epics’]

 

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Russian Lab Optimizes FDM 3D Printing Processes Leading to Increased Part Strength of 108%

In this study, Russian researchers sought to optimize FFF 3D printing parameters further, improving on strength and optimization processes. Their findings were released in the recently published ‘Desktop Fabrication of Strong Poly (Lactic Acid) Parts: FFF Process Parameters Tuning,’ as the team created five different samples from CAD models of parts, 3D printed on an Ultimaker 2. Their initial goal was to increase mechanical properties, allow for predictable quality, and stronger parts overall.

Testing part geometry optimization and results of study

Shape 1 was used to represent FFF 3D printed parts as the geometry suddenly forms a weak spot—with the rest of the samples working as designs to fix the issue in Shape 1:

  • Shape 2 was created to increase the strength of weak areas with a new material.
  • Shapes 2&3 were meant to increase part strength with FFF 3D printing in mind.
  • Shape 4 is the result of numerous design iterations.
  • Shape 5 mixes traditional approaches and FFF 3D printing optimization practices.

“Current work shows the effect of tuning the FFF process parameters on the strength of the samples of the same five shapes. Along with ‘coarse’ tuning — altering printing parameters for the whole printing cycle, the “fine” tuning is also studied,” stated the researchers. “In the latter case three parameters are varied during the printing cycle depending on the specific part of the sample being printed. It is shown that for a complex part, only for an optimized geometry (and only for it) significant increment of mechanical performance is achievable by optimization of FFF process parameters.”

For Shape 1, the results were vastly different. Interlayer bonding strength was ‘completely inefficient. Shapes 2-5, there was a significant increase in the part strength.

“It is clearly visible that the air corridors at the boundaries between plastic threads are fragmented and coalesce on the fracture of the Shape 5 sample, printed in mode D,” stated the researchers.

Shape 1 dimensions (a) and constitution (b) with shell interruption highlighted

The following parameters remained the same in each case:

  • Nozzle diameter (0.6 mm)
  • Heated bed temperature (60 °С
  • The first layer thickness (0.3 mm)
  • The first layer printing speed (25 mm/s).

“The effectiveness of coarse (modes B, C, D) and fine (mode E) FFF tuning for all tested shapes can be evaluated from the Figure 15. Parts of Shape 1, contained critical shell interruption, cannot be strengthened by technological mode optimization as it is shown on the chart (red bars). For all other tested shapes modifying technological modes led to a significant positive effect. Significant increase in strength without loss of product surface and dimensional quality can be achieved by reducing the layer thickness (Shapes 2, 3, 4 and 5, mode C) or by fine tuning the 3D printing parameters (Shape 5, mode E),” concluded the authors.

As 3D printing continues to progress, with multiple offshoots branching off into their own impressive realms from bioprinting to 4D printing, researchers continue to tighten up processes in FFF 3D printing from working with defects to improving speed exponentially. What do you think of this news? Let us know your thoughts! Join the discussion of this and other 3D printing topics at 3DPrintBoard.com.

Destruction of Shape 3 samples printed in mode A [61] (a) and mode B (b). For the mode B sample,
after the test is over, it is still not possible to separate the shaft from the boss with bare hands

[Source / Images: ‘Desktop Fabrication of Strong Poly (Lactic Acid) Parts: FFF Process Parameters Tuning’]

 

The post Russian Lab Optimizes FDM 3D Printing Processes Leading to Increased Part Strength of 108% appeared first on 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing.