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4b), tensile strength is generally superior with the notch strength declining continually with increasing temperature. Notch strengthening or weakening governed by transition of shear failure to normal mode fracture Xianqi Lei1, Congling Li2, Xinghua Shi1, Xianghong Xu1 & Yujie Wei1 Notched metallic glasses (MGs) have received much attention recently due to their intriguing mechanical properties compared to their unnotched counterparts, but so far no fundamental understanding of the correlation between failure behavior and notch depth/sharpness exists. Using molecular dynamics simulations, we report necking and large notch strengthening in MGs with symmetric sharp-and Figure 6. Macroscopic fractography of notched samples after tensile failure. (a) to (e) SEM images to show final fractured samples with different /a and their shear angles.

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Notch strengthening or weakening relies on the existence of failure mode transition and materials exhibiting shear failure while subjected to tension will notch strengthen. Circumferentially notched bars are known to induce stress triaxiality: Shear deformation in the neck of such samples is confined by the shoulders, which gives rise to high A notch strengthening effect was found based on comparing the nominal flexural strength of the notched and un-notched specimens. From in-situ observations of the notched specimens, it was found Notch strengthening is well documented for metals and normally arises because the triaxial stress at the notch tip suppresses yield until the axial stress across the notch is considerably greater than the yield stress, Gy .

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Analysis of the {sigma}-N{sub f} results obtained at 600 C under fatigue and creep-fatigue conditions allowed the generalization of the {sigma}-N{sub f}-K{sub t} relation proposed in an earlier study Abstract. Metallic foams show notch-strengthening behavior when analyzing double-edge notched specimen in compression and tension. A discrete microstructural model has been used to simulate the effect of notch depth and specimen size on the net-section-strength.

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In the present work, we tried to find this universal equation from experimental results of metallic glasses (MGs) and other materials as Volume 5, Issue 6 (June 2008) Notch Strengthening and Its Impact on the Deformation and Fracture of 316L Stainless Steel (Received 19 December 2006; accepted 18 April 2008) Notch-Strengthening Phenomenon Under Creep-Fatigue Loading Conditions N. Merah, Assistant Professor, Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, P.O. Box 1758, Dhahran 31261, Saudi Arabia notch brittleness References in periodicals archive ?

The notch tensile strength (NTS) of a material is the value given by performing a standard tensile strength test on a notched specimen of the material. The ratio between the NTS and the tensile strength is called the notch strength ratio (NSR).
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Journal of Pressure Vessel Technology, 2000. Nesar Merah Metallic foams show notch-strengthening behavior when analyzing double-edge notched specimen in compression and tension. A discrete microstructural model has been used to simulate the effect of notch depth and specimen size on the net-section-strength. OSTI.GOV Journal Article: Notch-strengthening phenomenon under creep-fatigue loading conditions Title: Notch-strengthening phenomenon under creep-fatigue loading conditions Full Record Notch strengthening or weakening relies on the existence of failure mode transition and materials exhibiting shear failure while subjected to tension will notch strengthen. Circumferentially notched bars are known to induce stress triaxiality: Shear deformation in the neck of such samples is confined by the shoulders, which gives rise to high hydrostatic tension 1 , 2 .

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The notch tensile strength (NTS) of a material is the value given by performing a standard tensile strength test on a notched specimen of the material. The ratio between the NTS and the tensile strength is called the notch strength ratio (NSR).