Stress Analysis Using Photoelasticity Technique – A Review

Jain, Yash

doi:10.22214/ijraset.2017.8293

Cited by 7 publications

(4 citation statements)

References 14 publications

(7 reference statements)

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“…The stress–strain analysis is a branch of engineering that uses a variety of techniques to determine the stresses and strains in materials and structures that have been subjected to forces. There are many techniques of stress–strain analysis used in dental research; among them the photoelastic technique, digital image correlation technique, electrical resistance strain gauge, and finite-element method (FEM) [ 31 , 43 – 45 ]. The finite-element method (FEM) is a numerical method of analyzing the stresses and strains at any point.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of stress and strain on mandible caused using “All-on-Four” system from PEEK in hybrid prosthesis: finite-element analysis

et al. 2022

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Hybrid prostheses have recently been used as suitable treatment alternatives for edentulous individuals to restore the mastication mechanism. These prostheses utilize “All on four” concept, in which four implants are inserted into the jaw bone, and supported by a bar. Titanium is usually used in the fabrication of “All on four” parts due to its good mechanical properties. However, it has many drawbacks including esthetic impairment, casting issues, hypersensitivity reactions, stress shielding, and incompatibility with imaging techniques. These drawbacks have prompted researchers to find alternative materials (e.g., polymers). Recently, the new polymeric material PEEK has a major role in dentistry, due to its biocompatibility, shock-absorbing ability, and good mechanical properties. This work used the finite-element method to conduct stress–strain analysis on mandible rehabilitated with a hybrid prosthesis, using PEEK in the fabrication of “All on four” parts instead of titanium, using different densities of spongy bone. As the density of spongy bone is expected to influence the choice of “All on four” fabrication material. A 300 N vertical force was applied unilaterally, bilaterally, and anteriorly to stimulate the different mastication mechanisms. The results illustrated that PEEK material reduced the stresses and strains on bone tissues and increased the mucosal stress, compared to titanium. Consequently, this material was recommended to be used in the fabrication of “All on four” parts, especially in the low-density model. However, further research on PEEK implants and abutments is required in near future.

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Section: Discussionmentioning

confidence: 99%

Evaluation of stress and strain on mandible caused using “All-on-Four” system from PEEK in hybrid prosthesis: finite-element analysis

et al. 2022

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“…For precise stress analysis in large components, expensive equipment is needed. Also, 3D photoelasticity experiments are very time-consuming and tedious [12,13]. Finite element analysis (FEA) is a modern tool for numerical stress analysis, with the advantage of applying it to solids of irregular geometry, which could contain heterogenous material properties.…”

Section: International Journal Of Dental Materials 2024 ; 6( 1 )mentioning

confidence: 99%

Influence of post design and elastic modulus mismatch between dentin and post-core on stress distribution in endodontically treated teeth: a finite element analysis study

Reddy,

Dinakar,

Natha Reddy

et al. 2024

IJDM

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Background:ParaPostFiber Posts are made to use resin-based cement and core build-up materials to provide an optimal Monoblock between the dentin-post-crown, resulting in one cohesive restoration.Aim:To evaluate the stress distribution pattern of a Severely damaged maxillary central incisor restored with ParaPost Taper lux, fiber lux and E-max crown using Finite element analysis. Materials and methods:Two 3-D FEA models of maxillary central incisor were simulated with anatomy-based geometric structures. Different Glass Fiber reinforced composite posts (PTL and PFL) and full coverage restorations (Lithium disilicate) were used. The paracore (dual-cured glass-reinforced composite material) was used for core build-up and cementation of both the Posts and full coronal restorations to create an optimal Monoblock effect. MODEL 1: Parapost Taper Lux (PTL), Paracore & Lithium disilicate Full coverage restoration. (LidiS).MODEL 2: Parapost Fiber Lux (PFL), Paracore & Lithium disilicate Full coverage restoration. (LidiS). A 3D model of the maxillary central incisor area, including restorative components, was created. The normal masticatory load of 100 N were applied at a 5mm distance from the incisal edge, at an angle of 45 ̊ in relation to the long axis of the tooth was simulated onto the imported models. Von Mises [Vm] stresses generated at the Post–Core assembly, Coronal & Radicular dentin were numerically recorded, color-coded, and compared.Results: The maximum stresses were evidenced both at the mid and coronal thirds of the labial aspects of radicular dentin, and the least stresses were observed at the palatal aspect of apical 3rd.Conclusion:Parallel-sided post (Parapost Fiber Lux) showed the greatest stress distribution on the middle third of the labial radicular dentin.

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“…The model of the component is observed under load in a circular polariscope arrangement, as described in Section 2.2 above. An isochromatic fringe pattern is seen, and the principal stress difference at a point, 1-2=0 when isochromatic fringes are present and 'N' is 'zero' at the point, can be determined using Equation (8). If the result of a finite element analysis shows that the stress at the point under consideration is zero, then the material at that point can be eliminated.…”

Section: Experimental Topology Optimizationmentioning

confidence: 99%

Numerical and Experimental Photoelasticity Topology Optimization

BG,

2023

Preprint

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The photoelasticity experimental technique is developed, which extends the topology optimization method to realistic engineering design problems. The new approach enables the efficient design of complex engineering structures by allowing the designer to control the material distribution among the design areas during the optimal design process, thereby allowing the use of multiload mechanical components in a variety of applications. This study enables a novel approach to topology optimization using the photoelasticity method. The primary objective of this research is to demonstrate the viability and efficacy of using photoelasticity in topology optimization for stress-constrained design problems. The proposed methodology involves of a number of essential steps, including material selection, specimen preparation, photoelastic testing, image processing, and optimization algorithms. The integration of photoelasticity into the optimization process permits more accurate and insightful evaluations of stress distributions within structures as well as more realistic stress constraints, resulting in designs that are not only structurally efficient but also resistant to failure. The methodology presented here provides an innovative and practical approach to solving real-world engineering problems, particularly in fields where accurate stress analysis is crucial, including aerospace engineering, civil engineering, and biomechanics. The photoelasticity experimental method is demonstrated for the linking plate design problem associated with the brake drum end. The case study illustrates the potential significance of the newly developed capability for a wide variety of engineering design problems, which reduces the amount of material by 50%. This methodology expands upon conventional topology optimization techniques that rely solely on numerical simulations.

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Stress Analysis Using Photoelasticity Technique – A Review

Cited by 7 publications

References 14 publications

Evaluation of stress and strain on mandible caused using “All-on-Four” system from PEEK in hybrid prosthesis: finite-element analysis

Evaluation of stress and strain on mandible caused using “All-on-Four” system from PEEK in hybrid prosthesis: finite-element analysis

Influence of post design and elastic modulus mismatch between dentin and post-core on stress distribution in endodontically treated teeth: a finite element analysis study

Numerical and Experimental Photoelasticity Topology Optimization

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