PSI - Issue 82

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2026) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 82 (2026) 253–259

© 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID organizers Abstract The frequent use of columns as members of a variety of load-bearing engineering structures and facilities requires detailed analyses of different problems associated with strength, fracture and failure. The clamped column under consideration in this paper represents a tri-layered structure. The external layers are symmetric. The layers have viscoelastic behaviour. Besides, the layers are made by materials which exhibit continuous inhomogeneity along the column length. The aim of this paper is to analyze two delamination cracks between layers. The column is under support subsidence. The effect of the subsidence on delamination cracks is explored in detail. In this relation, a solution of the strain energy release rate that accounts for the support subsidence is derived. The solution also takes into account the continuous change of the material properties along the column length. This solution is checked-up against early published approaches for obtaining of the strain energy release rate. Additionally, the study examines how the length of the delamination cracks influences the strain energy release rate. A parametric study is carried-out to explore the effects of the material inhomogeneity and other parameters on the delaminations in the column under support subsidence. © 2026 The Authors. Copy from the contract: Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID organizers Keywords: Column; Delamination; Support subsidence; Layered structure; Material inhomogeneity 1. Introduction Multilayered engineering materials are suitable for use in various constructions (Kaul (2014), Rzhanitsyn (1986)). These materials have a variety of advantages over the homogeneous structural materials. For instance, multilayered materials offer very good possibilities for reducing the deadweight of the constructions. The wide application of 8th International Conference on Structural Integrity and Durability (ICSID2025) Effect of supports subsidence on delamination of clamped columns Victor Rizov* Department of Technical Mechanics, University of Architecture, Civil Engineering and Geodesy, 1 Chr. Smirnensky blvd., 1046 – Sofia, Bulgaria

* Corresponding author. Tel.: + (359-2) 963 52 45 / 664; fax: + (359-2) 86 56 863. E-mail address: v_rizov_fhe@uacg.bg

2452-3216 © 2026 The Authors. Copy from the contract: Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID organizers

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID organizers 10.1016/j.prostr.2026.04.039