Experimental study on the fracture toughness of concrete reinforced with multi-size polypropylene fibres

To investigate the effects of offset notch on the fracture properties of rock beam under bending load, granite beam specimens with “one single offset notch” and “central and offset double notches” are made. A series of three-point bending beam tests on the specimens are carried out by controlling the displacement rate of central notch. The whole load-displacement (P-CMOD) curves are obtained. Experimental results show that the larger the distance between the offset notch and beam central is, the larger are the peak load and nominal strength of the specimen. The peak load and nominal strength for the “central and offset double notches” specimens are both larger than those for the “single central notch” specimen. A fracture model considering the effect of offset notch is developed, and the relationship between the offset notch parameter, tensile strength, and fracture toughness is established.

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Experimental Study of Mode-I Fracture Toughness for Layered Shale Based on Two ISRM-Suggested Methods

Rock Mechanics and Rock Engineering ◽

10.1007/s00603-017-1180-8 ◽

2017 ◽

Vol 50 (7) ◽

pp. 1933-1939 ◽

Cited By ~ 12

Author(s):

Hongjian Wang ◽

Fei Zhao ◽

Zhiquan Huang ◽

Yamin Yao ◽

Guangxiang Yuan

Keyword(s):

Fracture Toughness ◽

Experimental Study ◽

Mode I ◽

Mode I Fracture ◽

Mode I Fracture Toughness

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Experimental Study of the Fracture Toughness of a Ceramic/Ceramic-Matrix Composite Sandwich Structure

Journal of the American Ceramic Society ◽

10.1111/j.1151-2916.1995.tb08862.x ◽

1995 ◽

Vol 78 (6) ◽

pp. 1633-1639 ◽

Cited By ~ 2

Author(s):

Zhiguang Li ◽

Minoru Taya ◽

Martin L. Dunn ◽

Ryuzo Watanabe

Keyword(s):

Fracture Toughness ◽

Experimental Study ◽

Matrix Composite ◽

Sandwich Structure ◽

Ceramic Matrix Composite ◽

Ceramic Matrix ◽

Composite Sandwich

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Effects of Microstructure of Quasicrystal Alloys on Their Mechanical and Tribological Performance

Journal of Tribology ◽

10.1115/1.4039528 ◽

2018 ◽

Vol 140 (5) ◽

Cited By ~ 3

Author(s):

Kyungjun Lee ◽

Wei Dai ◽

Donald Naugle ◽

Hong Liang

Keyword(s):

Fracture Toughness ◽

Experimental Study ◽

Wear Rate ◽

Tungsten Carbide ◽

Crystal Structures ◽

Tribological Performance ◽

Alloy Composite ◽

Severe Damage ◽

Current Design ◽

Fe Alloys

The current design of materials against wear considers hardness as the sole material property. As a result, the brittleness associated with increased hardness leads to severe damage. The purpose of this research is to understand the nature of conflicts between hardness and toughness of a new alloy composite. First, we designed Al-Cu-Fe alloys containing crystal structures of λ, β, and quasi-crystalline i-phase. These and their combination with others lead to a set of alloys with various hardness and fracture toughness. Experimental study was carried out using a noble and hard tungsten carbide (WC) ball against sample disks. The WC ball did not produce any wear. The wear rate of those alloys was found to be dependent not only on their hardness, but also the toughness, an alternative to the well-accepted Archard-based equations.

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