{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T21:27:36Z","timestamp":1789507656791,"version":"build-2803163510"},"reference-count":32,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2023,1,10]],"date-time":"2023-01-10T00:00:00Z","timestamp":1673308800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Education and Science of the Republic of Poland","award":["FD-20\/IL-4\/018"],"award-info":[{"award-number":["FD-20\/IL-4\/018"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The most frequently used construction material in buildings is concrete exhibiting a brittle behaviour. Adding fibers to concrete can improve its ductility and mechanical properties. To this end, a laboratory study was conducted to present an experimental model for the specimens\u2019 size effect of on macro-synthetic fiber-reinforced concrete using variations in fracture energy. Composite concrete beams with different thicknesses and widths were made and tested under mode I to obtain (1) fracture toughness, (2) fracture energy, and (3) critical stress intensity factor values. Results indicated that by increasing the thickness and the width, fracture toughness and fracture energy were enhanced. Moreover, increasing the thickness and width of the beam led to critical stress intensity factors enhancement respectively by 35.01\u201341.43% and 7.77\u20138.09%.<\/jats:p>","DOI":"10.3390\/ma16020673","type":"journal-article","created":{"date-parts":[[2023,1,11]],"date-time":"2023-01-11T04:45:58Z","timestamp":1673412358000},"page":"673","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Assessment of the Specimen Size Effect on the Fracture Energy of Macro-Synthetic-Fiber-Reinforced Concrete"],"prefix":"10.3390","volume":"16","author":[{"given":"Mohammad","family":"Daneshfar","sequence":"first","affiliation":[{"name":"School of Civil and Environmental Engineering, Tarbiat Modares University, Tehran 14115-111, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abolfazl","family":"Hassani","sequence":"additional","affiliation":[{"name":"School of Civil and Environmental Engineering, Tarbiat Modares University, Tehran 14115-111, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammad Reza Mohammad","family":"Aliha","sequence":"additional","affiliation":[{"name":"Welding and Joining Research Center, School of Industrial Engineering, Iran University of Science and Technology (IUST), Narmak, 16846-13114, Tehran, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9212-8340","authenticated-orcid":false,"given":"Tomasz","family":"Sadowski","sequence":"additional","affiliation":[{"name":"Department of Solid Mechanics, The Lublin University of Technology, Nadbystrzycka 40 Str., 20-2618 Lublin, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,10]]},"reference":[{"key":"ref_1","unstructured":"Zongjin, L.J.H. 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