Reliability of FEA on the Results of Mechanical Properties of Materials

Gomes, Érica Alves; Diana, Hugo Henrique; Oliveira, Juliana Santos; Silva‐Sousa, Yara Teresinha Corrêa; Faria, Adriana Cláudia Lapria; Ribeiro, Ricardo Faria

doi:10.1590/0103-6440201300639

Cited by 19 publications

(18 citation statements)

References 22 publications

(17 reference statements)

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“…Similar fracture strength was noted both in weakened as nonweakened roots, regardless restoring protocol employed. Within the clinical conditions simulated in this study, it is believed that the similarity among elastic modulus of materials employed (fiber posts (30-40 GPa), resin cement (18.2 GPa) (22) and composite resin (20 GPa) with dentin structure (15-25 GPa) assisted in shock absorption, accompanying flexural movements of the tooth (17), creating a monoblock able to homogeneously distribute the tensions, which increases tooth strength (9). This result is in agreement with the studies of Silva et al (10), Wandscher et al (23) and partly according to the findings of Gomes et al (12).…”

Section: Discussionmentioning

confidence: 99%

Fracture Strength of Weakened Anterior Teeth Associated to Different Reconstructive Techniques

et al. 2016

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This study evaluated the fracture strength of endodontically treated teeth submitted to reconstructive techniques through dynamic and static tests. Forty human anterior teeth were divided into 4 groups (n=10): GNW (non-weakened) -root restored with glass fiber post (GFP), GW -weakened root restored with GFP, GDA -weakened root restored with direct anatomic GFP, and GIA -weakened root restored with indirect anatomic GFP. The teeth were endodontically treated considering that experimental groups (GW, GDA and GIA) simulated weakened roots for restoration with GFP using different techniques. The GFP was luted with resin cement and the coronal portion was restored with composite resin and metallic crowns. All samples were submitted to chewing simulation at 60 cycles/ min in a total of 300,000 cycles. The survival samples were further exposed to compressive loading at a crosshead speed of 1.0 mm/min in a universal testing machine. The load was applied at 135° to the long axis of the tooth until failure. Data were analyzed by ANOVA (α=0.05). After chewing simulation were observed: GNW: 100% of survival roots; GW: 70% of survival roots, and GDA and GIA: 80% of survival roots. The mean fracture strength values (N) were 280.6 (GNW), 239.0 (GW), 221.3 (GDA), and 234.1 (GIA) without significant difference among the groups (p=0.7476). The results suggested similar fracture strength in both weakened and non-weakened teeth regardless the reconstructive technique of root internal wall. Higher incidence of catastrophic fracture was observed in weakened teeth without restoration of the root internal wall.

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Section: Discussionmentioning

confidence: 99%

Fracture Strength of Weakened Anterior Teeth Associated to Different Reconstructive Techniques

et al. 2016

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“…Nevertheless, in clinical conditions, occlusal loads are also distributed on the abutment teeth. However, in this research, loadings were only exercised on the pontic tooth [37]. Additionally, occlusal and parafunctional forces may differ (300 to 1200 N) among patients depending on age, sex, tooth position, and temporomandibular disorders.…”

Section: Discussionmentioning

confidence: 96%

Influence of Resin Cement Thickness and Elastic Modulus on the Stress Distribution of Zirconium Dioxide Inlay-Bridge: 3D Finite Element Analysis

et al. 2021

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The mechanical properties and the thickness of the resin cement agents used for bonding inlay bridges can modify the clinical performance of the restoration such as debonding or prosthetic materials fracture. Thus, the aim of this study was to evaluate the stress distribution and the maximum strain generated by resin cements with different elastic moduli and thicknesses used to cement resin-bonded fixed partial denture (RBFPD). A three-dimensional (3D) finite element analysis (FEA) was used, and a 3D model was created based on a Cone-Beam Computed Tomography system (CBCT). The model was analyzed by the Ansys software. The model fixation occurred at the root of the abutment teeth and an axial load of 300 N was applied on the occlusal surface of the pontic. The highest stress value was observed for the Variolink 0.4 group (1.76 × 106 Pa), while the lowest was noted for the Panavia 0.2 group (1.07 × 106 Pa). Furthermore, the highest total deformation value was found for the Variolink 0.2 group (3.36 × 10−4 m), while the lowest was observed for the Panavia 0.4 group (2.33 × 10−4 m). By means of this FEA, 0.2 mm layer Panavia F2.0 seemed to exhibit a more favorable stress distribution when used for cementation of posterior zirconium-dioxide-based RBFPD. However, both studied materials possessed clinically acceptable properties.

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“…A validation study on the car safety level was carried out by adopting theoretical analysis. In the process of generating structural results in the solver, the main mechanical properties used are the Young modulus (E) and Poisson ratio () of each simulated structure [39]. Note that the stresses and Max Max strains are computed from the resulted displacements.…”

Section: Car Safety Level Validationmentioning

confidence: 99%

Fluid-Structure Interaction on The Design of Fully Assembled Shell Eco-Marathon (SEM) Prototype Car

Tiew

Lee

Chang

et al. 2020

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To achieve high fuel efficiency, vehicles designs are inclined to choose lightweight materials and structures. However, these structures are generally weak, and structural integrity is a common concern. The purpose of this paper is to carry out fluid-structure interaction (FSI) study in one-way coupling analysis on a Shell Eco Marathon (SEM) prototype car which travels in a low-speed range to analyse its structural response. A new set of economical materials is proposed and analysed with the concern on self-fabrication process. The Flax fibre composite is introduced as a part of the proposed material set due to its environmental and economic advantages. The study herein is purely a numerical simulation work as a first approach to design a sustainable SEM prototype car. The fully assembled SEM prototype car was analysed with the proposed materials with ANSYS Workbench in the coupling of the fluid (ANSYS Fluent) and structural solver (ANSYS Mechanical) in a one-way FSI. Even with a thin shell design, the proposed material only experiences minimum deformations. The simulations also reveal that the maximum von-Mises stress experienced, after considered the safety factor, is still several order lower than the yield strength. This study has confirmed that the car design has fulfilled its structural requirements to operate at the design speed.

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Reliability of FEA on the Results of Mechanical Properties of Materials

Cited by 19 publications

References 22 publications

Fracture Strength of Weakened Anterior Teeth Associated to Different Reconstructive Techniques

Fracture Strength of Weakened Anterior Teeth Associated to Different Reconstructive Techniques

Influence of Resin Cement Thickness and Elastic Modulus on the Stress Distribution of Zirconium Dioxide Inlay-Bridge: 3D Finite Element Analysis

Fluid-Structure Interaction on The Design of Fully Assembled Shell Eco-Marathon (SEM) Prototype Car

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