development and fundamental performance of dual …
TRANSCRIPT
1T.Yamamoto 1A.Kokubu 1Yamamoto Metal Technos Co.,Ltd.
4-7 Setoguchi 2-chome,Hirano-ku, Osaka 547-0032, Japan
2T.Sakai 2I. Kiyama
2Ritsumeikan University, College of Science and Engineering, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
3Y.Nakamura
3Toyota National College of Technology,
Eiseicho 2-1, Toyota-shi, Aichi, 472-8525, Japan
DEVELOPMENT AND FUNDAMENTAL PERFORMANCE
OF DUAL-SPINDLE ROTATING BENDING FATIGUE TESTING MACHINE
WITH SPECIAL DEVICE PROVIDING CORROSIVE ENVIRONMENT
2nd Japan-China Joint Symposium on Fatigue of Engineering Materials and Structures,
October. 17, 2011, Chengdu, China
Background
Background 1
Recently, particular attention has been paying to the fatigue property of
metallic materials in the very high cycle regime to realize the low-carbon
sustainable society.
But, one of difficulties in fatigue tests in the very high cycle regime is to take a
long time to perform the fatigue test. If the fatigue test is performed at the
loading frequency of 50Hz, it takes 200 days to 109 cycles.
Background 2
The fatigue property in corrosive environment is very important because
various kinds of mechanical structures have to be used in corrosive
environments.
But the fatigue property is not clear.
Development of New Testing Machine
★ In order to overcome this difficulty, we have developed special type
of fatigue testing machines in rotating bending, in which four
specimens can be tested simultaneously. Thus a series of fatigue
tests even in gigacycle regime can be carried out within a
reasonable period.
★ Based on this advantageous performance, the name of “GIGA
QUAD” was accepted for this new machine. Accordingly, this
machine is very useful to file up a number of fatigue test date.
Fatigue testing machine combined
with environmental device
Dual-Spindle Rtating Bending Fatigue Testing Machine
<Outline>
GIGA QUAD :YRB200 GIGA QUAD : YRB200L
Weight
Counter
Collet nut
Outer block
Specimen
Spring
20Kg
(MAX)
Counter Spring
Collet nut
Outer block
Specimen
Weight
80Kg
(MAX)
SIZE OF DEVICE(mm): 470X400X1050
WEIGHT(Kg): 140 SIZE OF DEVICE(mm): 800X660X1100
WEIGHT(Kg): 170
3,150rpm
(52.5Hz)
Dual-Spindle Rtating Bending Fatigue Testing Machine
<Outline>
Counter
Collet nut
Specimen
Spring
Dual-Spindle Rtating Bending Fatigue Testing Machine
<Outline>
α： Length of the specimen
φβ： Diameter of the critical section
φγ： Diameter of the specimen grip
φβ
C0.5 R
α
φγ
Hourglass type of specimen
Values of stress concentration factor
φ β φ γ =6mm φ γ =8mm φ γ =10mm
3.0 1.06 1.06 1.06
4.0 1.08 1.08 1.08
GIGA QUAD
<4 Advantages>
1. High efficiency
2. Easy operation
3. Support for environment testing
4. Without heat generation
GIGA QUAD
<4 Advantages 1>
High efficiency
Specimen 2
Specimen 3
Specimen 4 Specimen 1
GIGA QUAD
<4 Advantages 2>
Easy operation
How to fix
How to remove
Φ5
COLLET CHUCK
Φ10
GIGA QUAD
<4 Advantages 3>
Flowing pass-tube
Stand
Corrosive chamber
Outer block
Support for environment testing
GIGA QUAD
<4 Advantages 3>[continued]
schematics of corrosion fatigue testing machine
Support for environment testing
GIGA QUAD
<4 Advantages 4>
Without heat generation
• Fatigue test can be performed under room
temperature without heat generation
• Any cooling system is not required to the
fatigue test. This point is quite differ from
the ultrasonic fatigue tests.
Concluding Remarks
The high performance fatigue testing machine in rotating bending “GIGA
QUAD” has been developed in this work.
Based on a lot of experimental results, the fundamental performance of this
testing machine was confirmed.
Actually, GIGA QUAD are already being used at many laboratories in
universities and industries in JAPAN.
Thus, every customer has informed that GIGA QUAD is successfully used to
obtain a number of fatigue data within a reasonable short period.
Taizoh Yamamoto
Introduction of the Technical Advisors
who also use “GIGA QUAD” for their own research on fatigue of metallic materials
Institute of Mechanics
Chinese Academy of Sciences,
Beijing, China
Prof. Hong Youshi
In China
Research Organization of
Science and Engineering,
Ritsumeikan University
Prof. Tatsuo Sakai
In Japan
Thank you
for your attention.