Searched for: subject%3A%22cracking%22
(1 - 15 of 15)
document
Quan, H. (author), Alderliesten, R.C. (author)
An energy equation for fatigue crack growth was proposed. It equates the total external work per cycle (dW/dN) to the sum of plastic dissipation (dU<sub>pl</sub>/dN), change in strain energy stored (dU<sub>e</sub>/dN) and the energy dissipated in new crack surface formation (dU<sub>a</sub>/dN). Fatigue crack growth experiment of 7075-T6 was...
journal article 2022
document
Quan, H. (author), Alderliesten, R.C. (author)
An energy equation for fatigue crack growth in adhesive joints is proposed. Fatigue experiment on DCB adhesive joint specimens was used to derive the relation between fatigue crack growth rate (da/dN) and energy variables in this equation. The result shows plastic dissipation and change in stored strain energy, whose relation with da/dN both...
journal article 2022
document
Khaji, Zahra (author), Fakoor, Mahdi (author), Manafi Farid, Hannaneh (author), Alderliesten, R.C. (author)
A mixed-mode I/II fracture criterion for predicting the fracture response of composite materials is proposed. This criterion is derived based on a comprehensive study and the consideration of the physics of fracture onset. The fracture phenomenon that causes the various damage mechanisms at the vicinity of the crack tip is examined. It is...
journal article 2022
document
Quan, H. (author), Alderliesten, R.C. (author)
Plastic dissipation accompanies fatigue crack growth in ductile materials. Previous studies presented a relation between plastic dissipation (dW/dN) and the fatigue crack growth rate (da/dN), where some researchers assumed a linear relation between both to enable crack growth predictions. To study the validity of this assumption, this paper...
journal article 2021
document
van Kuijk, J.J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
The substantiation of fatigue crack closure corrections is disputed, based on the closure stress definition. The ΔK<sub>eff</sub> equation lacks a physical explanation. An inconsistency is observed between the opening stress S<sub>op<sub>phen</sub></sub> as used by this equation and the physical opening stress S<sub>op<sub>phys</sub></sub>....
journal article 2021
document
van Kuijk, J.J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
To improve resolution of in-situ measurement of crack closure and opening in fatigue, potential drop (PD) measurement technique has been further developed to measure thousands of times through each load cycle with high precision. The results are interpreted with physical phenomena like strain, Poisson's effect, piezo-resistivity, plasticity,...
journal article 2021
document
Pascoe, J.A. (author), Zavatta, N. (author), Troiani, E. (author), Alderliesten, R.C. (author)
The effect of adhesive thickness on fatigue crack growth in an epoxy film adhesive (FM94) was investigated, using a combination of experiments and numerical modelling. For the range of thicknesses investigated an increased thickness led to an increased crack growth rate. It was found that the energy required per unit of crack growth did not...
journal article 2020
document
Alderliesten, R.C. (author)
With the introduction of fibre metal laminates (FMLs) as a (fatigue) damage tolerant material concept in aeronautics, an interesting field emerged where fatigue damage interaction plays a dominant role. The hybrid concept effectively demands evaluating fatigue damage growth based on fracture phenomena typical for both metals and fibre...
journal article 2019
document
Pascoe, J.A. (author), Zarouchas, D. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
Current methods for prediction of fatigue crack growth are based on empirical correlations which do not take the crack growth behaviour within a single cycle into account. To improve these prediction methods, more understanding of the physical mechanisms of crack growth is required. In this research the acoustic emission technique was used to...
journal article 2018
document
Usman, M. (author), Pascoe, J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
The effect of temperature on fatigue crack growth in epoxy adhesive bonds was investigated for a range of temperatures from -55 to 80[U+202F]°C. The fatigue crack growth behaviour was characterised using both strain energy release rate (SERR) and by measurements of energy dissipation. It was found that for a given maximum SERR, or a given...
journal article 2018
document
Pascoe, J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
The available models for the prediction of fatigue crack growth in adhesive bonds rely on the similitude principle. In most cases, one of three similitude parameters based on the strain energy release rate (SERR) is used; i.e. G<sub>max</sub>, (Δ√G)<sup>2</sup>, or ΔG. In all cases it is usually observed that keeping the similitude parameter...
journal article 2016
document
Pascoe, J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
Measurement of the energy dissipation during fatigue crack growth is used as a technique to gain more insight into the physics of the crack growth process. It is shown that the amount of energy dissipation required per unit of crack growth is determined by Gmax, whereas the total amount of energy available for crack growth in a single cycle is...
conference paper 2016
document
Alderliesten, R.C. (author)
The appropriateness of some common similitude principles with respect to describing and predicting fatigue damage propagation is discussed. Linear elastic fracture mechanics have provided a basis to describe damage growth using stress intensity factors or strain energy release rates, both related to the work of Griffith and Irwin. The fatigue...
journal article 2016
document
Pascoe, J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
Current prediction methods for growth of disbonds under fatigue loading are generally based on a correlation with either the maximum strain energy release rate (SERR) or the SERR range. This paper highlights some issues with this approach. In particular, it is argued that the maximum SERR or the SERR range alone do not give sufficient...
journal article 2014
document
Alderliesten, R.C. (author)
Fibre Metal Laminate Glare consists of thin aluminium layers bonded together with pre-impregnated glass fibre layers and shows an excellent fatigue crack growth behaviour compared to monolithic aluminium. The fibres are insensitive to the occurring fatigue loads and remain intact while the fatigue cracks occur in the aluminium layers. As a...
doctoral thesis 2005
Searched for: subject%3A%22cracking%22
(1 - 15 of 15)