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?



papers
GIGA QUAD

8. What happens in the longer life regime?

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?
When you usually perform rotating bending fatigue test, the specimen is fractured due to the crack occurred on the material surface.
But, in the giga-cycle regime more than 108 times, the specimen sometimes fractures because “Fish-eye” which is generated inside of material (refer to a figure below) causes progress of the crack.
Though there are still many unexplained facts regarding how and when “Fish-eye” is generated, “Fish-eye” seems to be a factor which declines fatigue limit further that is estimated by experiment result to 107 times.
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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