Carrera unified formulation (CUF) for the analysis of disbonds in single lap joints (SLJ)

Francesco Nicassio; Maria Cinefra; Gennaro Scarselli; Matteo Filippi; Alfonso Pagani; Erasmo Carrera

doi:10.1117/12.2616542

18 April 2022 Carrera unified formulation (CUF) for the analysis of disbonds in single lap joints (SLJ)

Francesco Nicassio, Maria Cinefra, Gennaro Scarselli, Matteo Filippi, Alfonso Pagani, Erasmo Carrera

Proceedings Volume 12047, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVI; 1204702 (2022) https://doi.org/10.1117/12.2616542
Event: SPIE Smart Structures + Nondestructive Evaluation, 2022, Long Beach, California, United States

Abstract

The aim of this work is the study of the adhesion integrity of metallic Single Lap Joints (SLJs) through the assessment of the MUL² CODE, software developed by the MUL² Research Group - Department of Mechanical and Aerospace Engineering of Politecnico di Torino. The MUL² CODE is implemented through the Carrera Unified Formulation (CUF) for 2D structures based on Hierarchical Legendre Expansion (HLE) polynomials. An efficient method for the Structural Health Monitoring (SHM) of bonded joints is simulated and verified by CUF approach, in order to reduce the computational cost of analyses: by using transient excitations (toneburst signals), the structural health of damaged SLJ can be numerically evaluated. The interaction mechanism between the waves traveling through the investigated specimens is numerically modeled with a simple Finite Elements (FE) model and it is solved via MUL² CODE and commercial software Ansys Workbench, respectively. Experimental campaigns data are compared with CUF and Ansys results demonstrating the consistence of the MUL² formulation that is computationally simpler, but very efficient for the joint analysis. The presented and discussed CUF application is able to quantify with a high accuracy the debonding extension in the damaged SLJ, simply tuning the excitation frequency of the SHM technique.

Conference Presentation

Citation Download Citation

Francesco Nicassio, Maria Cinefra, Gennaro Scarselli, Matteo Filippi, Alfonso Pagani, and Erasmo Carrera "Carrera unified formulation (CUF) for the analysis of disbonds in single lap joints (SLJ)", Proc. SPIE 12047, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVI, 1204702 (18 April 2022); https://doi.org/10.1117/12.2616542

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