The Ball-on-Three-Balls strength test for discs and plates: Extending and simplifying stress evaluation

Staudacher, Maximilian; Supancic, Peter

doi:10.1016/j.jeurceramsoc.2022.09.047

Cited by 11 publications

(1 citation statement)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The geometrical function f depends on the radii of the plate, the center position of the balls, the thickness t, and the poisson constant. Börger and Staudacher et al offer a full analysis of the function and geometrical limits [43,[45][46][47].…”

Section: Mechanical Strengthmentioning

confidence: 99%

Design of Reliable Remobilisation Finger Implants with Geometry Elements of a Triple Periodic Minimal Surface Structure via Additive Manufacturing of Silicon Nitride

Koplin

Schwarzer-Fischer

Zschippang

et al. 2023

View full text Add to dashboard Cite

When finger joints become immobile due to an accident during sports or a widespread disease such as rheumatoid arthritis, customised finger joint implants are to be created. In an automated process chain, implants will be produced from ceramic or metallic materials. Artificial intelligence-supported software is used to calculate three-dimensional models of the finger bones from two-dimensional X-ray images. Then, the individual implant design is derived from the finger model and 3D printed. The 3D printing process and the structures used are evaluated via model tests and the final implant design via a reliability calculation in a way to ensure that this is also possible via an AI process in the future. Using additive manufacturing with silicon nitride-based ceramics, model specimens and implants are produced via the lithography-based ceramic vat photopolymerisation process with full geometry or elements of triple periodic minimal surfaces structure. The model specimens are tested experimentally, and the loads are matched with a characteristic strength assuming a Weibull distribution of defects in the volume to generate and match failure probabilities. Calculated fracture forces of the silicon nitride-based ceramic structure was validated by comparison of simulation and tests, and the calculation can be used as a quality index for training of artificial intelligence in the future. The proposed method for individualized finger implant design and manufacturing may allow for correction of potential malpositions of the fingers in the future.

show abstract

Section: Mechanical Strengthmentioning

confidence: 99%

Design of Reliable Remobilisation Finger Implants with Geometry Elements of a Triple Periodic Minimal Surface Structure via Additive Manufacturing of Silicon Nitride

Koplin

Schwarzer-Fischer

Zschippang

et al. 2023

View full text Add to dashboard Cite

show abstract

Instantiations of Multiscale Kinship in Pressing‐Defect Distributions in Yttria‐Stabilized Zirconias by Powder Partitioning

Pereira,

Lohbauer,

Schulbert

et al. 2024

Adv Eng Mater

View full text Add to dashboard Cite

Modern dry‐pressing of ceramic powders using spray‐dried granulates cannot avoid the occurrence of defects related to persisting inter‐ and intra‐granulate interstitial voids. These constitute the parent defect size population limiting the application of polycrystalline ceramics in high‐stress conditions. The mitigation of such defects could widen the range of application in technical and biomedical engineering, reduce safe range for design and extend the lifetime of components. Here we use the Weibull size effect on strength in size‐partitioned YSZ feedstocks to explore the viability of changing the density distribution of granulate sizes as an effective strategy to obtain a denser particle packing that could reduce the size distribution of strength‐limiting pressing‐defects. In a direct assessment of critical defect size using multiscale strength testing with a dataset of ∽1300 values, we demonstrate here the success of such an approach in increasing the strength reliability for small volume components, but its ultimate failure in altering the defect size distribution in sintered YSZ ceramics across several length scales. We ultimately show that granule morphology (spherical or dimpled) fails to affect the defect density and size distribution in YSZ ceramics.This article is protected by copyright. All rights reserved.

show abstract

Effect of airborne particle abrasion and regeneration firing on the strength of 3D-printed 3Y and 5Y zirconia ceramics

Mirt,

Kocjan,

Hofer

et al. 2024

Dental Materials

View full text Add to dashboard Cite

The Ball-on-Three-Balls strength test for discs and plates: Extending and simplifying stress evaluation

Cited by 11 publications

References 31 publications

Design of Reliable Remobilisation Finger Implants with Geometry Elements of a Triple Periodic Minimal Surface Structure via Additive Manufacturing of Silicon Nitride

Design of Reliable Remobilisation Finger Implants with Geometry Elements of a Triple Periodic Minimal Surface Structure via Additive Manufacturing of Silicon Nitride

Instantiations of Multiscale Kinship in Pressing‐Defect Distributions in Yttria‐Stabilized Zirconias by Powder Partitioning

Effect of airborne particle abrasion and regeneration firing on the strength of 3D-printed 3Y and 5Y zirconia ceramics

Contact Info

Product

Resources

About