A Continuum Damage Mechanics-based Piecewise Fatigue Damage Model for Fatigue Life Prediction of Fiber-Reinforced Laminated Composites

Gholami, Peyman; Kouchakzadeh, Mohammad Ali; Farsi, Mohammad Ali

doi:10.5829/ije.2021.34.06c.15

Cited by 3 publications

(3 citation statements)

References 51 publications

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“…Composite materials are one of the most well-known materials for various functions that reduce the structure's weight without reducing its strength. Polymer composites exploit a wide range of applications due to their excellent performance in mechanical, electrical, and thermal properties (such as medical, electronic, automobile, and aerospace) (15).…”

Section: Introductionmentioning

confidence: 99%

A Novel Design and Simulation of a Nano Prosthetic Artificial Heart Valves

Mahmood Ali

2024

IJE

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Heart valve replacement is a major health burden and is required by millions of people worldwide, which invites the continuous need to discover and manufacture more effective and permanent artificial replacements. In the present work, unique models of eight artificial heart valves were designed and examined using seven synthetic and nanocomposite materials. The designed valves were examined to determine the best designs and materials in terms of durability, flexibility, and energy consumption, and to improve the biomechanical performance by using the Response Surface Methodology (RSM) and the Design Expert System 13. The highest values of the equivalent stress due to the applied blood pressure on the moving parts on each type of manufactured heart valve occur in valves with three dimensions moving parts, reached in the mitral tri-leaflet valve 14.13 MPa, followed by the tricuspid aortic valve. The equivalent stresses for other types of valves produced with simple surface action were lower than 2 MPa. The strain energy that is expended during the process of diastole and systole was found to be directly proportional to the strength and flexibility of the materials used. The energy consumption rates decrease when using highly elastic materials such as TPE and PSN4. The values of this energy also increase with an increase in the area of the moving parts of the valve, especially when faced with the process of closing blood flow, as with the use of the tricuspid aortic valve (TAV). The highest total deformation resulted in the valve body when using TPU, followed by TPE, nylon, PETG, and PLA, while the lowest deformation rates were observed when using PSN4, which ranged from 5x10 5 to 0.1 mm, followed by SIBSTAR103 nanostructured rubber. The obtained values of stress safety factors were decreased with the complexity of the movement for the moving parts of the valve. The highest rates were recorded when using the tricuspid mitral valve, reaching 2.45 when using the high-strength and flexible PSN4 nanomaterial. It can be concluded that the best materials for manufacturing these four types of valves are the PSN4, followed by SIBSTAR103T, TPU, and TPE. The use of PETG, PLA, and nylon materials is not recommended for the manufacture of any prosthetic heart valves, due to their lack of strength, flexibility, and high brittleness, especially for PETG and PLA materials. It was also noted here that PSN4 is the only material suitable for the manufacture of mitral tri-leaflet and tricuspid mitral valve artificial valves. For other types of valves manufactured with a single leaflet, high safety stress factors were obtained because their movement is simple, flat, and in one direction, where the highest values were observed when testing a single hemispherical leaflet type valve, then the conical caged ball and the caged ball type, respectively.

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Section: Introductionmentioning

confidence: 99%

A Novel Design and Simulation of a Nano Prosthetic Artificial Heart Valves

Mahmood Ali

2024

IJE

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“…The behavior of structures exhibits responses under assigned loading conditions, which aids in investigating structural deformations such as damage, elasticity, plasticity, and vibration (31)(32)(33). Analyzing these responses indicates the structural component usage experienced during operational conditions, allowing for the prediction of fatigue and service life (34)(35)(36)(37). A similar approach is adopted to investigate temperature changes resulting from deformation-induced heating in this study.…”

Section: Introductionmentioning

confidence: 99%

Development of Temperature-strain Prediction Based on Deformation-induced Heating Mechanism in SCM440 Surface Cracked Shaft under Ultrasonic Excitation

Lap-Arparat,

Tuchinda

2024

IJE

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The mechanisms behind temperature and material deformation in vibrothermography remain questionable, presenting a gap in understanding. This study investigates the deformation-induced mechanism, focusing solely on the heat generation associated with strain development. Both experimental and simulation approaches are incorporated. The experimental segment explores the temperature-strain relationship of SCM440 material, commonly used for rotating shafts. This behavior is examined through the connection between temperature change and material deformation during a uniaxial tensile test. Results indicate that temperature change and distribution can be predicted based on plastic strain development. Finite Element Method (FEM) simulation is utilized to model the excitation of a shaft with and without an elliptic surface crack. Various cracked shaft configurations are investigated, revealing distinct strain generation and distribution patterns. High strain alteration is notably observed around the crack tips, enabling the detection of shaft discontinuity. Consequently, a temperature prediction technique is developed to estimate temperature based on strain alteration during deformation. Adequate excitation power and the use of a high-sensitivity IR camera are recommended for the effective application of the temperature prediction technique. Additionally, this study provides insights into understanding the utility and limitations of vibrothermography for inspecting engineering component damage based on experimental temperature-strain relationships and computational predictions of strain distribution in cracked shafts under excitation. These findings offer guidance for engineering applications and future research endeavors.

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“…The materials research leads to the development of intelligent materials such as alloys, ceramics and composites [1]. Due to matrix cracking, breakage, delamination and de-bonding of matrix [2], in 1970 aluminum-based metal matrix composites (AMMC's) using silicon carbide (SiC) whisker particles came into the picture as an alternative material for aerospace and automotive applications [3][4][5][6][7]. MMCs are the combination of two or more constituent materials *Corresponding Author Email: dinesh_61900120@nitkkr.ac.in (D. Kumar) (where the matrix material consists of metal and reinforcement can be metal or non-metal) [8].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Wear Behaviour of Stir Cast Aluminum Metal Matrix Composite: A Review

2022

IJE

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In this 21st century, various materials like metals, alloys, and composites are available for different industrial applications. Composite materials are gaining popularity due to their enhanced mechanical properties over other materials. However, for continuous improvement in the properties of these materials, different research groups are constantly inVolved in it. In this research paper, the focus is to review the mechanical properties like hardness, tensile strength, flexural strength, impact strength along with surface characteristics like wear resistance of AMMC's. As per the available literature, liquid state processing is more popular than solid-state processing due to the better dispersion of the reinforcement particles in the matrix materials. Stir casting is mostly used liquid state processing method because of its ease and the overall low cost of production. It has been noticed that the mechanical and surface characteristics of AMMC's can be improved by adding different reinforcement particles in small percentages (usually 0.5-20%). It has been observed that hardness, tensile strength, and flexural strength for mostly used AMMC's ranges from MPa respectively. This research paper also included the influence of various working parameters on the wear rate of AMMC's. It is noticed that wear loss for AMMC's generally varies from 0.0050-0.004 g. The impact resistance is a crucial parameter in the study of AMMC's used for aerospace and automotive applications and it has been noticed that its value for popular AMMC's varies from 3.6-38 J.

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A Continuum Damage Mechanics-based Piecewise Fatigue Damage Model for Fatigue Life Prediction of Fiber-Reinforced Laminated Composites

Abstract: exploit a wide range of applications (such as electronic, aerospace, automobile, etc.) due to their all-around excellent performance in mechanical, thermal, and electrical properties [5][6][7][8][9]. One of the main concerns in using these materials is their relatively unknown and

Cited by 3 publications

References 51 publications

A Novel Design and Simulation of a Nano Prosthetic Artificial Heart Valves

A Novel Design and Simulation of a Nano Prosthetic Artificial Heart Valves

Development of Temperature-strain Prediction Based on Deformation-induced Heating Mechanism in SCM440 Surface Cracked Shaft under Ultrasonic Excitation

Mechanical Properties and Wear Behaviour of Stir Cast Aluminum Metal Matrix Composite: A Review

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