Loading Rate Effects for Flaws Undergoing Mixed-Mode I/III Fracture

Fahem, Ali Fahad; Kidane, Addis; Sutton, Michael A.

doi:10.1007/s11340-021-00739-0

Cited by 4 publications

(2 citation statements)

References 30 publications

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“…• The crack tip stress field is determined by the three major factors: the stress intensity factor and the elastic constants, and the bedding plane inclination angle. • Most of the work discusses Mode-I of fracture and does not discuss the effects of angles for Mode-I and Mode-II fracture and process zone on the rock specimens [20].…”

Section: The Fracture Datamentioning

confidence: 99%

The experimental methods and elastic properties of shale bedding planes materials state-of-the-art review

Messer

Fahem

Guthai

et al. 2022

QJES

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The identification of physical properties and fracture behavior of shale or hydrocarbon materials has grown to have substantial importance in the last four decades to industry and investigators alike due to its importance in unconventional oil and gas resources. This interest deviates from shale being a transversely isotropic material formed by bedding layers with different orientations and isotropic properties. In this paper, the experimental setup and the mechanical properties of shale materials have been reviewed. The investigator shows that the properties of shale are not unique, and it is highly dependent on, volume, loading type, and geolocation. Furthermore, the investigator utilized different experimental setup methods to identify the elastic properties of shale and the most common methods are Transducers Strain Detection, Strain gauges, Ultrasonic, and Digital image correlation that is shown in detail.

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Section: The Fracture Datamentioning

confidence: 99%

The experimental methods and elastic properties of shale bedding planes materials state-of-the-art review

Messer

Fahem

Guthai

et al. 2022

QJES

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“…In general, the multilayered armor technique is one of the most advanced mechanisms to increase protection and reduce weight [6]. On the other hand, monolithic panels such as steel sheets have high protection with high density [7]; also, this structure is insufficient to protect the vehicle against the high energy of explosion besides high shock waves with debris compared to the multilayered system [8]. The best structure that can resist the blast is the structure that deforms while maintaining the ability to control the impact force [1,9].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of perforated multi-layered composite armor subjected to ballistic impact

Mosa,

Fahem,

Thumbalam Guthai

2024

QJES

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Ballistic protection of vehicles has become an important endeavor, as it is concerned with how occupants can possess a comfortable feeling together with a high level of protection during a shooting incident. In recent years, numerous forms of armor have employed several kinds of distinct materials to produce a new generation of panels to address the crucial issues in the structure of armor, such as how to provide high protection with reduced density combined with further increasing the stacking and bond strength between the layers of the panel. This study attempts to use a different approach represented by engineering design to combine with the high impact resistance and low weight, moreover high bonding between the laminate of structure. The structure of the suggested armor consists of five main layers made of different materials, FRP composite materials, then two perforated layers of steel, followed by one perforated layer of rubber, and finally one layer of aluminum. These layers were tested via 9 mm caliber to specify the ability of each layer to absorb the energy of the projectile and then the configuration of the layers depending on the function of each layer. However, the results offer a significant ballistic performance with reasonably reduced mass and excellent bonding strength between the layers of the structure.

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