Endurance Limit for HMA Based on Healing Concept Using Uniaxial Tension-Compression Fatigue Test

In-Core Monitor (ICM) housing of BWR reactor pressure vessel is subjected to the flow induced vibration (FIV). The flow fluctuation takes places in the lower plenum of reactor pressure vessel. It is very much important to evaluate the structural integrity of ICM housing in order to maintain high operating rate. Thus we performed the FIV simulated fatigue test of ICM housing. However, the stress at the weld toe induced by FIV is sufficiently low not to fail. The fatigue endurance limit for the weld root fatigue test specimen with dull taper is 196 MPa. On the while, the fatigue endurance limit for the weld root fatigue test specimen with steep taper is not obtained. When the fatigue test results are approximated by the Stromeyer equation, the fatigue strength for the fatigue life of 109 cycles is estimated as 27 MPa. Finally we performed the fracture mechanics analysis, which indicates that the stress intensity factors for Mode I and II range from 0.1 to 0.2 MPam so that the fatigue crack is not initiated at the weld root by FIV.

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Relationships between hierarchical structure and properties in macromolecular systems

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100126950 ◽

1987 ◽

Vol 45 ◽

pp. 440-443

Author(s):

E. Baer

Keyword(s):

Uniaxial Tension ◽

Hierarchical Structure ◽

Inorganic Material ◽

Hierarchical Structures ◽

Bone Collagen ◽

Structure And Properties ◽

Connective Tissues ◽

Scale Level ◽

Fibrous Protein ◽

Macromolecular Systems

The most advanced macromolecular materials are found in plants and animals, and certainly the connective tissues in mammals are amongst the most advanced macromolecular composites known to mankind. The efficient use of collagen, a fibrous protein, in the design of both soft and hard connective tissues is worthy of comment. Very crudely, in bone collagen serves as a highly efficient binder for the inorganic hydroxyappatite which stiffens the structure. The interactions between the organic fiber of collagen and the inorganic material seem to occur at the nano (scale) level of organization. Epitatic crystallization of the inorganic phase on the fibers has been reported to give a highly anisotropic, stress responsive, structure. Soft connective tissues also have sophisticated oriented hierarchical structures. The collagen fibers are “glued” together by a highly hydrated gel-like proteoglycan matrix. One of the simplest structures of this type is tendon which functions primarily in uniaxial tension as a reinforced elastomeric cable between muscle and bone.

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Effect of Curved Thin-film Device on Natural Frequency of Rectangle Membrane under Uniaxial Tension

AEROSPACE TECHNOLOGY JAPAN THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES ◽

10.2322/astj.jsass-d-17-00088 ◽

2019 ◽

Vol 18 (0) ◽

pp. 73-80 ◽

Cited By ~ 1

Author(s):

Masanori MATSUSHITA ◽

Nobukatsu OKUIZUMI ◽

Yasutaka SATOU ◽

Osamu MORI ◽

Takashi IWASA ◽

...

Keyword(s):

Thin Film ◽

Uniaxial Tension ◽

Natural Frequency ◽

Thin Film Device

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On the Mechanical Behavior of the Orthotropic Cord-Rubber Composite

Tire Science and Technology ◽

10.2346/1.2167223 ◽

1976 ◽

Vol 4 (4) ◽

pp. 219-232 ◽

Cited By ~ 2

Author(s):

Ö. Pósfalvi

Keyword(s):

Mechanical Behavior ◽

Uniaxial Tension ◽

Elastic Properties ◽

Large Deformations ◽

Virtual Work ◽

Poisson's Ratio ◽

Principle Of Virtual Work ◽

Effective Elastic Properties ◽

Rubber Composite ◽

Mooney Equation

Abstract The effective elastic properties of the cord-rubber composite are deduced from the principle of virtual work. Such a composite must be compliant in the noncord directions and therefore undergo large deformations. The Rivlin-Mooney equation is used to derive the effective Poisson's ratio and Young's modulus of the composite and as a basis for their measurement in uniaxial tension.

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