COMPANY

High-performance small airplane manufacturer

My major is aviation engineering, but I am also interested in mechanical engineering classes. He is an intern and has experience in designing mechanical lines at SOLIDWORKS. His research is on the mechanical behavior of metal lattices with different topologies under quasi-static compression by laminated modeling, under the guidance of professors and doctors. He is cheerful and energetic, and has a strong desire to complete conversations and descriptions in Japanese.

Profile

Country/Region

Singapore

Sex

Female

University

Nanyang Technological University, Singapore

Faculty

Aerospace Engineering

Academic Level

Bachelor

Message from the candidate:

When I got a job in Japan, I participated in the Japanese language no class program of Nanyang Technological University provided by ASIA to JAPAN (AtoJ). After that, in the process of getting a job in Japan, creating a resume in Japanese, Skype interview with AtoJ for desired occupation and industry, self-appeal, how to create a PR video, Japanese style interview correspondence Support will be provided. In the mock interview with AtoJ mentor, I was able to prepare for the day of the interview by not only preparing for the day but also taking measures for questions related to software technology.


The initial interview to get a job offer from a leading Japanese venture company was so quick that I was able to calmly work on my final year project and exams. Skype interviews are often more difficult than face-to-face interviews, so it took several days to prepare, but in the actual interview, I was able to calm down and respond to the interview in a coherent manner. The interview was conducted in English, so it was easy to convey my opinions and thoughts.

When I got the offer, I had anxiety and many questions about working in another country. By answering many questions through all the processes, I was able to resolve my anxiety and doubts. Working with Japanese people and many foreign employees at a cutting-edge venture company in Japan led to learning not only programming skills but also communication skills and working styles.

I have already joined the company and worked in Japan, but my experience so far has been extraordinary (irregular) to say the least. It’s been a month and a half since I moved from Singapore to Japan. During that time, the coronavirus was prevalent and due to an abnormal situation, all processes had to be carried out promptly after coming to Japan. Three days after arriving in Japan, I started working, and in the midst of a lot of confusion, I also went through the procedures for finding a place to live and the government office for living.

Final Year Project

Title: Mechanical behavior of unconstrained metal lattices with varying topologies by additive manufacturing under quasi-static compression (mechanical behavior of metal lattices of different topologies by quasi-static compression)

This research will be conducted by one person from 2019.1 to 2019.12 as a Final Year Project, which is a part of the theme of the teacher and PhD seniors.


① Purpose
Compare the accuracy of the mechanical properties of the simulated structure with a 3D printed (laser melting (SLM)) structure. If the results are similar, the simulated structure is a viable option. Then, knowing the mechanical properties of the structure before manufacturing, we can reduce the cost.
We prove the following three things.
A. Since we changed the unit cell topology of the metal lattice structure and the diameter-to-length ratio of the unit cells, what is the effect on the mechanical properties?
B. Compare the mechanical properties of the metal structure simulated by Finite Element Analysis using the software “ABAQUS / Standard” with the actually printed metal structure.
C. Since the Finite Element Analysis simulation was performed on “ABAQUS / Standard” and “ABAQUS / Explicit”, where are the results different?


② Implementation details
A. Literature search
i. I read academic journals on Finite Element Analysis, additive manufacturing technology (Selective Laser Melting), and unit cell topologies of metal lattice structures.

B. Target determination
i. My homeroom teacher and my PhD senior consulted and decided to investigate the metal structure created by the BCC and FCC unit cell topologies.

C. Creating a simulation model
i. Computer -Aided Engineering (CAE) software “ABAQUS / Standard” was learned by myself. I was able to use SIMULIA’s guides and tutorials.
ii. Then, in “ABAQUS / Standard”, I made a model (Beam Element Model) of the structure made up of the unit cell topology of BCC and FCC.
iii. Next, we also created a model (Beam Element Model) in which the diameter to length ratio of each unit cell was changed.

D. Implementation of simulation
i. “ABAQUS / Standard” can be used for the mechanical properties of the structure made up of the unit cell topology of BCC and FCC, and Finite Element Analysis was performed. The structure simulated compression.

E. Analysis of simulation results
i. Create force-displacement curves, compression animations, and more.
— (This is the current progress. From there, we will continue in the next semester.) —
ii. Measurement of Equivalent plastic strain and Stress triaxiality of the structure

F. Making 3D prints and measuring mechanical properties
i. 3D printing (laser melting method) The actual metal structure made is printed, and the printed metal structure is compressed using Instron. The structure then takes the result of the actual mechanical properties.

G. Comparison of simulation and experiment
i. Compare the results of the simulated and actually printed mechanical properties. Compare the force-displacement curve and stress-strain curve.
ii. Highlight the difference between simulation and experiment and explain why.


③ Impressions of going so far
Since this project is done by myself, I did a lot of trial and error. You will be satisfied when you get the results you expect.

*Some parts of the video muted for identity proteciton