Showing papers by "Noel P. O’Dowd published in 2021"
TL;DR: In this paper, a full factorial parametric study using ANOVA is carried out to examine the effects of three USW input parameters (weld energy, vibration amplitude, and clamping pressure) on lap shear strength.
14 citations
TL;DR: In this article, the effect of moisture aging on flexural, interlaminar shear and in-plane shear properties and associated failure modes of non-crimp fabric (NCF) based basalt fiber reinforced epoxy composites at different stress levels was analyzed.
12 citations
TL;DR: In this paper, a multiscale model is developed to predict damage evolution in the necked region of a uniaxial tensile test specimen using a combination of finite element (FE) modelling and experimental measurements.
11 citations
TL;DR: In this article, a laser-assisted ATP was used to manufacture two thermoplastic composites (IM7/PEEK and AS4/PA12) using optical microscopy and computed tomography (CT) scans.
Abstract: Automated Tape Placement (ATP) technology is one of the processes that is used for the production of the thermoplastic composite materials. The ATP process is complex, requiring multiple melting/crystallization cycles. In the current paper, laser-assisted ATP was used to manufacture two thermoplastic composites (IM7/PEEK and AS4/PA12). Those specimens were compared to specimens that were made of thermoset polymeric composites (IM7/8552) manufactured while using a standard autoclave cycle. In order assess the quality, void content, fibre distribution, and fibre misalignment were measured. After manufacturing, specimens from the three materials were assessed using optical microscopy and computed tomography (CT) scans. The results showed that, as compared to the thermoset composites, thermoplastics that are manufactured by the ATP have a higher amount of voids. On the other hand, manufacturing using the ATP showed an improvement in both the fibre distribution inside the matrix and the fibre misalignment.
7 citations
TL;DR: In this paper, the in-situ damage progression in three carbon fibre reinforced cross-ply composite systems under tensile loading was examined. And the results showed that the in situ damage progression of these three composite systems is linear with the number of tensile loads.
Abstract: The in-situ damage progression in three carbon fibre reinforced cross-ply composite systems under tensile loading is examined, namely, carbon IM7/epoxy, carbon IM7/PEEK and carbon AS4/polyamide. Ep...
7 citations
TL;DR: In this article, the bending behavior of a laminate comprising unidirectional fiber composite plies is considered using Euler-Bernoulli beam theory and the influence of size on the bending modulus is investigated.
2 citations
TL;DR: In this paper, a model-based design is used to design and validate digitally a simple state model, using a modelbased design package, in this case MathWorks® Simulink® software.
1 citations
TL;DR: In this article, the effects of irregular fiber spacing on size effects and identifying a characteristic length that can be used to represent the heterogeneity in an equivalent homogeneous micropolar model are discussed.