Rotating Bending Fatigue Testing Machine [Japan]
YAMAMOTO METAL TECHNOS CO., LTD.
Japanese
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Contents
1.What is Metal Fatigue?
2.Does Metal Fatigue often happen?
3.What we learn from the big accidents in the past
4.Recent trend “Giga-cycle fatigue”
5.How is fatigue testing operated?
6.What is S-N curve?
7.How to utilize S-N curve?
8.What happens in the longer life regime?



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GIGA QUAD

7.How to utilize S-N curve?

Talk about Dual Rotating Bending Fatigue Testing Machine -Contents-
  1.What is Metal Fatigue?
  2.Does Metal Fatigue often happen?
  3.What we learn from the big accidents in the past
  4.Recent trend “Giga-cycle fatigue”
  5.How is fatigue testing operated?
  6.What is S-N curve?
  7.How to utilize S-N curve?
  8.What happens in the longer life regime?
We need S-N curve to make sure of safety and reliability of mechanical structures, and to compare coventional materials with new materials.


【example】

■Compare coventional materials with new developing materials
In case you develop the new materials to improve or substitute conventinal materials, S-N curve is utilized.
When you make S-N curve below, you can recognize that developed material is more difficult to break and stronger than conventional one.
Therefore, you can adopt new materials with security.
Fatigue limit new materials
■Utilize product designs
In case the fatigue limit of S-N curve is not clear, we have to bind the product to excessive safty factor.
For that, the product will get heavy and the cost is higher than expected.
In other words, if you know the clear S-N curve, you will reduce the wight and cut down the price.

■Utilize quality inspection
In case you are served with claims for materials, you utilize S-N curve to quality inspection.
First, you make specimens of the claimed material, and then make S-N curve.
When you compare conventinal material with claimed material, you will make sure whether the material has promlem, or not.
In case the material has problem, you have the chance to renew production technique.

■Evaluate surface modification
GIGA QUAD is suitable for any kind of research and studies for metal fatigue characteristics with surface modification.
In the case of rotating bending, the loading on the surface is maximum, but the loading of the center is zero.Actually, GIGA QUAD is rotating bending, this is why you can perceive that the distance of fatigue resistance between after surface treatment and before that is clear, not for sure axial loading.
Effect of alumite surface treatments on long-life fatigue behavior of cast aluminum in rotating bending
Talk about Dual Rotating Bending Fatigue Testing Machine -Contents-
  1.What is Metal Fatigue?
  2.Does Metal Fatigue often happen?
  3.What we learn from the big accidents in the past
  4.Recent trend “Giga-cycle fatigue”
  5.How is fatigue testing operated?
  6.What is S-N curve?
  7.How to utilize S-N curve?
  8.What happens in the longer life regime?
GIGA  QUAD series Dual-spindle rotating bending fatigue  testing machine
>> Contents



YAMAMOTO METAL TECHNOS CO., LTD.
Rotating Bending Fatigue Testing Machine [Japan]

4-7, Setoguchi 2-chome, Hirano-ku, 547-0034 Osaka Japan
TEL: 81-6-6704-1800 E-mail: info@yama-kin.co.jp


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