While the geometry of aerospace assemblies is carefully controlled, for many industrial applications such as marine structures bond line thickness can vary significantly. In this study epoxy adhesive joints of different thicknesses between aluminium substrates have been characterized using physicochemical analyses (differential scanning calorimetry, DSC; dynamic mechanical analysis, DMA; spectr...

Nowadays, with increasing energy requirements, the use of clean resources has become important. Fuel cells are an important key for technology due to wide range utilization areas such as automotive, portable power applications, electricity generation, space, aviation and naval technologies. Additionally, they have many significant properties not producing harmful gases, therefore do cause envir...

In this paper a new method to determine the fracture properties and strain energy release rate for Carbon- Polyester composite has been introduced.  Fracture characteristics such as critical stress intensity factor and critical strain energy release rate for mode I, mode II and mixed mode loading were determined using Arcan type specimen. 130 layers of carbon fiber polyester woven composite wit...

Abstract Characterization of shear behavior in composite materials remains a not fully solved problem. In the last fifty years, many different approaches have been proposed to solve this problem (rail shear, thin-walled tube torsion, off-axis tensile, ±45° Arcan, Iosipescu, asymmetric four-point bend, plate twist, v-notched rail flexural, and frame), although none these achieved an unquestionab...

This paper deals with the numerical implementation of exponential Drucker-Parger plasticity model in commercial finite element software, ABAQUS, via user subroutine UMAT for adhesive joint simulations. The influence hydrostatic pressure on strength was investigated by a modified Arcan fixture designed particularly to induce different state within an layer. developed UMAT, which utilizes associa...