English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Notched components are commonly used in engineering structures, where stressconcentration may easily lead to crack initiation and development. The maingoal of this work is to develop a simple numerical method to predict thestructural strength and crack-growth-path of U-notched specimens made ofbrittle materials. For this purpose, the Fragile Points Method (FPM), aspreviously proposed by the authors, has been augmented by an interfacedebonding model at the interfaces of the FPM domains, to simulate crackinitiation and development. The formulations of FPM are based on adiscontinuous Galerkin weak form where point-based piece-wise-continuouspolynomial test and trial functions are used instead of element-based basisfunctions. In this work, the numerical fluxes introduced across interiorinterfaces between subdomains are postulated as the tractions acting on theinterface derived from an interface damage model. The interface damage istriggered when the numerical flux reaches the interface strength, and theprocess of crack-surface separation is governed by the fracture energy. In thisway, arbitrary crack initiation and propagation can be naturally simulatedwithout the need for knowing the fracture-patch before-hand. Additionally, asmall penalty parameter is sufficient to enforce the weak-form continuitycondition before damage initiation, without causing problems such as artificialcompliance and numerical ill-conditioning. As validations, the proposed FPMmethod with the interface damage model is used to predict the structuralstrength and crack-development from U-notched structures made of brittlematerials, which is useful but challenging in engineering structural designpractices.

A Fragile Points Method, with an interface debonding model, to simulate damage and fracture of U-notched structures