Universal Testing Machine Frame Deformation
Lu, Boi Hoa (2021)
2021
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-202201201483
https://urn.fi/URN:NBN:fi:amk-202201201483
Tiivistelmä
Concerning the Universal Testing Machine, this thesis aims to develop an alternative frame model for bending test. The design needs to be simple, increase the operator safety and fulfill criteria of bending standards.
The frame was designed in SolidWorks software, and built using AISI 4340 steel sheets. Laser cutting was used to prepare all parts of the frame, followed by welding to permanently join them into one single entity.
ASTM D790 and E2309 limit the frame strain to 0.0005, and maximum displacement to 1% of specimen deformation. Finite Element Analysis and Euler – Bernoulli theory were applied to simulate bending tests, to compute stress and deformation of the frame. Hooke’s law was for the calculation of strain and the largest force the frame can withstand corresponding to its strain limit.
As a result, the model was proved to be lighter, more affordable and safer than the traditional frame. The developed frame model fulfills ASTM D790 and Class A of E2309 until 13.7 kN. It fulfills D790 and Class B – E2309 to 14.38 kN for 20-mm span, to 22.01 kN for 30-mm span, and to 30 kN for the range from 50 – 400 mm span.
The frame was designed in SolidWorks software, and built using AISI 4340 steel sheets. Laser cutting was used to prepare all parts of the frame, followed by welding to permanently join them into one single entity.
ASTM D790 and E2309 limit the frame strain to 0.0005, and maximum displacement to 1% of specimen deformation. Finite Element Analysis and Euler – Bernoulli theory were applied to simulate bending tests, to compute stress and deformation of the frame. Hooke’s law was for the calculation of strain and the largest force the frame can withstand corresponding to its strain limit.
As a result, the model was proved to be lighter, more affordable and safer than the traditional frame. The developed frame model fulfills ASTM D790 and Class A of E2309 until 13.7 kN. It fulfills D790 and Class B – E2309 to 14.38 kN for 20-mm span, to 22.01 kN for 30-mm span, and to 30 kN for the range from 50 – 400 mm span.