Gradients in elastic modulus for improved contact-damage resistance. Part I: The silicon nitride–oxynitride glass system

Pender, D.C; Padture, Nitin P.; Giannakopoulos, A.E.; Suresh, S.

doi:10.1016/s1359-6454(01)00200-2

Cited by 97 publications

(61 citation statements)

References 29 publications

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“…Analytical and computational studies of the evolution of stresses and displacements in FGMs subjected to quasistatic loading (Suresh et al, 1997;Suresh and Mortensen, 1998;Suresh, 2001;Pender et al, 2001) show that the utilization and optimization of structures and geometry of a graded interface between two dissimilar layers can reduce stresses significantly. Such an effect is certainly also important in case of dynamical loading where energy-absorbing applications are of special interest.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of two-dimensional wave propagation in functionally graded materials

Berezovski

Engelbrecht

Maugin

2003

European Journal of Mechanics - A/Solids

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The propagation of stress waves in functionally graded materials (FGMs) is studied numerically by means of the composite wave-propagation algorithm. Two distinct models of FGMs are considered: i) a multilayered metal-ceramic composite with averaged properties within layers; ii) randomly embedded ceramic particles in a metal matrix with prescribed volume fraction. The numerical simulation demonstrates the applicability of that algorithm to the modelling of FGMs without any averaging procedure. The analysis based on simulation shows significant differences in the stress wave characteristics for the distinct models that can be used for optimizing the response of such structures to impact loading.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation of two-dimensional wave propagation in functionally graded materials

Berezovski

Engelbrecht

Maugin

2003

European Journal of Mechanics - A/Solids

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“…The results show that controlling gradient variations of the substrate could alter the contact tractions, even lead to a compressive Hertzian crack at the contact edges. The same conclusions were further made via spherical indentation experiments and FEM simulations [9][10][11]. Closed-form solutions to a two-dimensional contact between a rigid cylinder and an elastic graded half-space were given by Giannakopoulos and Pallot [12].…”

Section: Introductionmentioning

confidence: 62%

Thermo-contact mechanics of a rigid cylindrical punch sliding on a finite graded layer

Chen

Peng

2012

Acta Mech

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A steady-state thermo-contact model of a rigid insulated cylinder of radius R sliding on a finite graded elastic layer is studied, whose Young's modulus, thermal conductivity coefficient and thermal expansion coefficient vary exponentially in the thickness direction. The transfer matrix method and Fourier integral transform technique are used to obtain a Cauchy-type singular integral equation for the contact stresses. Numerical calculation yields the interface traction and temperature distributions below the rigid punch. It shows that crack damage in the finite graded layer due to the frictional sliding can be prevented by several alternative ways, such as decreasing the shear modulus ratio of the surface to the bottom, decreasing the friction coefficient, increasing the thickness of the finite graded layer, increasing the thermal conductivity coefficient ratio of the surface to the bottom or increasing the sliding velocity. The finding should be very useful for the design of novel graded materials with potential applications in aerospace, tribology, coatings, etc.

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“…It was revealed that FGMs reduce dramatically the remnants of thermal stresses raised at the metals and ceramics interface in other fields of applications [123]. Some studies demonstrated that when the contact surface of alumina or silicon nitride was infiltrated with aluminosilicate or oxynitride glass, respectively, they noticed that the graded glass/ceramic surfaces produced in this manner offered much better resistance to contact damage with and without a sliding action than either constituent ceramic or glass [124,125].…”

Section: Dental Crown Based On Functionally Graded Conceptmentioning

confidence: 99%

Functional Biomimetic Dental Restoration

Senan¹,

Madfa²

2017

Insights Into Various Aspects of Oral Health

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Bioinspired functionally graded approach is an innovative material technology, which has rapidly progressed both in terms of materials processing and computational modeling in recent years. Bioinspired functionally graded structure allows the integration of dissimilar materials without formation of severe internal stress and combines diverse properties into a single material system. It is a remarkable example of nature's ability to engineer functionally graded dental prostheses. Therefore, this novel technology is designed to improve the performance of the materials in medical and dental fields. Thus, this chapter book reviews the current status of the functionally graded dental prostheses and biomimetic process inspired by the human bone, enamel and dentin-enamel junction (DEJ) structures and the linear gradation in Young's modulus of the human bone, enamel and dentin-enamel junction, as a new material design approach, to improve the performance compared to traditional dental prostheses. Notable research is highlighted regarding application of biomimetic prostheses into various fields in dentistry. The current chapter book will open a new avenue for recent researches aimed at the further development of new dental prostheses for improving their clinical durability.

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Gradients in elastic modulus for improved contact-damage resistance. Part I: The silicon nitride–oxynitride glass system

Cited by 97 publications

References 29 publications

Numerical simulation of two-dimensional wave propagation in functionally graded materials

Numerical simulation of two-dimensional wave propagation in functionally graded materials

Thermo-contact mechanics of a rigid cylindrical punch sliding on a finite graded layer

Functional Biomimetic Dental Restoration

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