A Bi-Modulus Material Model for Bending Test on NHL3.5 Lime Mortar
The research provides an innovative contribution to the interpretation of three-point and four-point bending tests on mortars by employing a bi-modulus material model, which assumes an asymmetric constitutive law, i.e., different elastic moduli in tension and in compression. To this aim, Euler–Berno...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/2/486 |
| _version_ | 1797439358155882496 |
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| author | Rebecca Grazzini Giulia Misseri Luisa Rovero |
| author_facet | Rebecca Grazzini Giulia Misseri Luisa Rovero |
| author_sort | Rebecca Grazzini |
| collection | DOAJ |
| description | The research provides an innovative contribution to the interpretation of three-point and four-point bending tests on mortars by employing a bi-modulus material model, which assumes an asymmetric constitutive law, i.e., different elastic moduli in tension and in compression. To this aim, Euler–Bernoulli and Timoshenko bi-modulus beam models are defined, and the related displacement fields are reported for three-point loading, and provided for the first time for the four-point bending layout. A wide experimental campaign, including uni-axial tensile and compressive tests, three-point and four-point bending tests, and on notched specimens three-point tests for mode-I fracture energy, has been carried out on lime mortar specimens exploiting traditional contact (CE-DT) and contactless (DIC) measurement systems. Experimental results provided the values of tensile and compressive mechanical characteristics, which are employed to validate estimations of the analytical model. The tension-to-compression moduli ratio experimentally observed is on average 0.52. Experimental outcomes of the DIC analysis proved the bi-modulus behaviour during the four-point bending tests showing visible shifting of the neutral axis. The bi-modulus analytical model provides closer results to the experimental ones for the slender specimens subjected to four-point bending. |
| first_indexed | 2024-03-09T11:51:41Z |
| format | Article |
| id | doaj.art-97d18d51698f40ee8dd2ab91fa17ff1e |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T11:51:41Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-97d18d51698f40ee8dd2ab91fa17ff1e2023-11-30T23:13:55ZengMDPI AGMaterials1996-19442023-01-0116248610.3390/ma16020486A Bi-Modulus Material Model for Bending Test on NHL3.5 Lime MortarRebecca Grazzini0Giulia Misseri1Luisa Rovero2Materials and Structures Division, Department of Architecture, University of Florence, Piazza Brunelleschi 6, 50121 Florence, ItalyMaterials and Structures Division, Department of Architecture, University of Florence, Piazza Brunelleschi 6, 50121 Florence, ItalyMaterials and Structures Division, Department of Architecture, University of Florence, Piazza Brunelleschi 6, 50121 Florence, ItalyThe research provides an innovative contribution to the interpretation of three-point and four-point bending tests on mortars by employing a bi-modulus material model, which assumes an asymmetric constitutive law, i.e., different elastic moduli in tension and in compression. To this aim, Euler–Bernoulli and Timoshenko bi-modulus beam models are defined, and the related displacement fields are reported for three-point loading, and provided for the first time for the four-point bending layout. A wide experimental campaign, including uni-axial tensile and compressive tests, three-point and four-point bending tests, and on notched specimens three-point tests for mode-I fracture energy, has been carried out on lime mortar specimens exploiting traditional contact (CE-DT) and contactless (DIC) measurement systems. Experimental results provided the values of tensile and compressive mechanical characteristics, which are employed to validate estimations of the analytical model. The tension-to-compression moduli ratio experimentally observed is on average 0.52. Experimental outcomes of the DIC analysis proved the bi-modulus behaviour during the four-point bending tests showing visible shifting of the neutral axis. The bi-modulus analytical model provides closer results to the experimental ones for the slender specimens subjected to four-point bending.https://www.mdpi.com/1996-1944/16/2/486lime mortardirect and compressive tensile testbending testsDICbi-modulus modelTimoshenko beam |
| spellingShingle | Rebecca Grazzini Giulia Misseri Luisa Rovero A Bi-Modulus Material Model for Bending Test on NHL3.5 Lime Mortar Materials lime mortar direct and compressive tensile test bending tests DIC bi-modulus model Timoshenko beam |
| title | A Bi-Modulus Material Model for Bending Test on NHL3.5 Lime Mortar |
| title_full | A Bi-Modulus Material Model for Bending Test on NHL3.5 Lime Mortar |
| title_fullStr | A Bi-Modulus Material Model for Bending Test on NHL3.5 Lime Mortar |
| title_full_unstemmed | A Bi-Modulus Material Model for Bending Test on NHL3.5 Lime Mortar |
| title_short | A Bi-Modulus Material Model for Bending Test on NHL3.5 Lime Mortar |
| title_sort | bi modulus material model for bending test on nhl3 5 lime mortar |
| topic | lime mortar direct and compressive tensile test bending tests DIC bi-modulus model Timoshenko beam |
| url | https://www.mdpi.com/1996-1944/16/2/486 |
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