- Tytuł:
- Numerical Analysis of Material and Manufacturing Factors in Riveted Joints Under the Imperja Project
- Autorzy:
-
Szymczyk, E.
Bogusz, P.
Sławiński, G.
Jachimowicz, J. - Tematy:
-
riveted joints
fatigue strength
optical methods
SEM analysis - Pokaż więcej
- Wydawca:
- Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
- Powiązania:
- https://bibliotekanauki.pl/articles/97935.pdf  Link otwiera się w nowym oknie
- Opis:
- The aim of the project was to improve fatigue performance of riveted joints in airframes. Fatigue strength of a joint depends on structural, material and manufacturing factors. The project involved numerical and experimental analysis of material factors and manufacturing imperfections. The paper deals with the analysis of material structure and properties by means of the optical and SE methods. Static monotonic tests for sheet and rivet materials were carried out. ARAMIS optical system was used for the study of deformation and strain fields in the material during loading. This tool offers the possibility of a non-contact measurement with 3D image correlation methods (digital image correlation, DIC) using high-resolution digital CCD cameras. In ductile materials (such as aluminium alloy), subjected to appropriate loading conditions, voids may form, which grow and coalesce leading to crack formation and potential failure. A micro crack may be initiated at the inclusion particles and then voids grow around it. Experimental studies showed that these processes are strongly influenced by hydrostatic stress (Gurson’s material model). SEM analysis of material structure was carried out after performing static tests. In the paper, the authors present the influence of a material model on the results of numerical simulation of the tensile loaded samples with open and riveted holes. The application of Gurson’s material model allows observation of crack growth in the sample cross-section and determination of the sheet rupture as the moment when constraint force decreases to zero (material separation occurs).
- Dostawca treści:
- Biblioteka Nauki
Artykuł