Development of Multiaxial Creep Testing Machine Using Cruciform Specimen.

Mukai, Shoichi; Takada, Toshiyuki; Sakane, Masao; Ohnami, Masateru; Tsurui, Takafumi

doi:10.2472/jsms.45.559

Cited by 14 publications

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“…The specimen shape was determined by finite element analysis to distribute the stress uniformly in the gage part. The variation of stress amplitude was less than 5% up to 8 mm apart from the centre of the specimen under creep loading as reported in the previous paper [6]. The experimental apparatus used was an originally developed biaxial creep testing machine that has four loading devices and can apply a load to four arms of the specimen shown in Fig.…”

Section: Methodsmentioning

confidence: 96%

“…The relationship between the stress at gage part and loads tabulated in Table 2 was obtained using finite element analysis because the stress at the gage part cannot be directly obtained from the applied load in the case of cruciform specimen. Detailed description of determining the relationship was reported in the former paper [6].…”

Section: Methodsmentioning

confidence: 99%

“…that can perform multiaxial creep tests in much wider multiaxial stress states, and discussed the suitability of typical multiaxial stress parameters for assessing the creep lifetimes [6,7]. However, there still exist many open questions on multiaxial creep rupture lifetime and damage development.…”

Section: Introductionmentioning

confidence: 98%

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Creep rupture life and damage evaluation under multiaxial stress state for type 304 stainless steel

Zhang

Wakai

Sakane

2009

Materials Science and Engineering: A

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Section: Methodsmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

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Creep rupture life and damage evaluation under multiaxial stress state for type 304 stainless steel

Zhang

Wakai

Sakane

2009

Materials Science and Engineering: A

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“…Shape and dimensions of specimens tested (mm). Biaxial tension creep tests were performed by a biaxial tensile creep test machine for cruciform specimens developed in-house [6] of which the schematic is illustrated in Fig. 5 (a).…”

Section: Methodsmentioning

confidence: 99%

“…Principal strain rates in the three directions can be calculated by Eq. (5) and (6). The rupture elongation is assumed to be 40% on von Mises bases regardless the length of rupture lifetime of materials.…”

Section: ̇= (7)mentioning

confidence: 99%

Creep Damage Evaluation using Uniaxial Miniature Specimens for Multiaxially Damaged Components

et al. 2019

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This study discusses a method of evaluating multiaxial creep damage for high temperature components subjected to multiaxial creep damage utilizing a miniature creep testing. A new model of the damage evaluation is proposed based on a linear creep damage accumulation and von Mises equivalent stress being a measure of multiaxial creep damage. The model clearly indicates that conventional creep damage evaluation methods utilizing a unidirectional miniature creep testing give an unconservative estimate in some cases for multiaxially creep damaged components. To verify the appropriateness of the proposed model, multiaxial creep tests were performed using cruciform specimens of a Mod.9Cr-1Mo steel. Miniature specimens in two directions were machined from a pre-damaged cruciform specimen and the uniaxial creep rupture lifetimes of the miniature specimens demonstrate the validity of the proposed model. 2 Corresponding

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Effect of multiaxial stress and strain on low cycle fatigue, creep and creep‐fatigue lifetimes for type 304 steel cruciform and cubic specimens

Sakane

2018

Materialwissenschaft Werkst

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This paper discusses low cycle fatigue, creep and creep‐fatigue life evaluation methods for a SUS 304 austenitic stainless steel in a full range of strain and stress multiaxiality using a cruciform and cubic specimen. Five multiaxial strain parameters are investigated whether or not they appropriately express the trend of low cycle fatigue lives in the full range of biaxial stress state. Then, the effects of the stress biaxiality and triaxiality on creep void formation are discussed. The stress biaxiality and triaxiality raise the creep void formation and the void formation is confirmed even in an equi‐triaxial tension creep test in which the value of von Mises equivalent stress is zero. However, the stress biaxiality slightly shortens creep rupture lifetimes but the stress triaxiality drastically reduces creep rupture lifetimes. Finally, the effect of strain biaxiality on creep‐fatigue life is discussed based on the experimental results using a cruciform specimen by applying the linear damage rule. The predicted results of creep‐fatigue lives under biaxial strain states are slightly dependent on the applied multiaxial strain and stress parameters but there is no significant difference in the predicted lives depending on the multiaxial strain and stress parameters.

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Development of Multiaxial Creep Testing Machine Using Cruciform Specimen.

Cited by 14 publications

References 0 publications

Creep rupture life and damage evaluation under multiaxial stress state for type 304 stainless steel

Creep rupture life and damage evaluation under multiaxial stress state for type 304 stainless steel

Creep Damage Evaluation using Uniaxial Miniature Specimens for Multiaxially Damaged Components

Effect of multiaxial stress and strain on low cycle fatigue, creep and creep‐fatigue lifetimes for type 304 steel cruciform and cubic specimens

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