Cumulative tensile damage and consolidation effects on fracture properties of sandstone

Kód výsledku v IS VaVaI

RIV/68378297:_____/18:00496508 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.5772/intechopen.81434

DOI - Digital Object Identifier

10.5772/intechopen.81434

Jazyk výsledku

angličtina

Název v původním jazyce

Cumulative tensile damage and consolidation effects on fracture properties of sandstone

Popis výsledku v původním jazyce

The presence of cracks in many historical objects indicates the action of external forces accompanied by internal strain gradients. This is usually a repetitive process, and damage cumulation may occur. A study of these effects requires a suitable methodology for testing historical stone that has been subjected to repeated tension strains. The chapter presents the results of a pilot experimental assessment of changes in the mechanical characteristics of sandstone due to accumulation of damage. The Young modulus and the Poisson number were investigated, using a verified methodology for testing stone in simple tension and in cyclic simple tension/compression loading. The results show that the first tension load displacement can be approximated very satisfactorily by a power function, and the optical digital image correlation (DIC) method again demonstrated its capacity and suitability for measuring the complex deformation field on porous surfaces and on naturally well-structured surfaces. The chapter further presents a methodology for investigating fracture phenomena in sandstone treated for consolidation. It shows the preparation of test specimens with a cyclic loading generated crack, control of the test specimen preparation, and verification by means of X-ray micro-CT and DIC techniques. The chapter illustrates an influence of various consolidation agents on the toughness of cracked specimens.

Název v anglickém jazyce

Cumulative tensile damage and consolidation effects on fracture properties of sandstone

Popis výsledku anglicky

The presence of cracks in many historical objects indicates the action of external forces accompanied by internal strain gradients. This is usually a repetitive process, and damage cumulation may occur. A study of these effects requires a suitable methodology for testing historical stone that has been subjected to repeated tension strains. The chapter presents the results of a pilot experimental assessment of changes in the mechanical characteristics of sandstone due to accumulation of damage. The Young modulus and the Poisson number were investigated, using a verified methodology for testing stone in simple tension and in cyclic simple tension/compression loading. The results show that the first tension load displacement can be approximated very satisfactorily by a power function, and the optical digital image correlation (DIC) method again demonstrated its capacity and suitability for measuring the complex deformation field on porous surfaces and on naturally well-structured surfaces. The chapter further presents a methodology for investigating fracture phenomena in sandstone treated for consolidation. It shows the preparation of test specimens with a cyclic loading generated crack, control of the test specimen preparation, and verification by means of X-ray micro-CT and DIC techniques. The chapter illustrates an influence of various consolidation agents on the toughness of cracked specimens.

Druh

C - Kapitola v odborné knize

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

GBP105/12/G059: Kumulativní časově závislé procesy ve stavebních materiálech a konstrukcích

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Sustainable construction and building materials

ISBN

978-1-78985-749-8

Počet stran výsledku

15

Strana od-do

145-159

Počet stran knihy

270

Název nakladatele

IntechOpen

Místo vydání

London

Kód UT WoS kapitoly

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