Gradient material model in analysis of mechanical joints of CFRP laminate

Puchała, Krzysztof; Szymczyk, E.; Jachimowicz, J.; Bogusz, Paweł

doi:10.1063/1.5019060

Cited by 3 publications

(21 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Parameters of HTA/913 lamina, TR30S lamina and interfaces are presented in ref. [53]. Pilot holes were made in each part.…”

Section: Object Of Analysismentioning

confidence: 99%

“…[64][65][66]. An average diameter of those areas is 11.25 mm and standard deviation is 1.26 mm [53].…”

Section: Object Of Analysismentioning

confidence: 99%

“…However, it can be concluded based on refs. [51][52][53] that other forms of damage also occur and influence mechanical properties of laminate around the hole. Many papers deal with mechanical joints, especially in a laminate structure [10][11][12][13][14][15][16][17], and conclude that mechanical joints still undergo both the experimental and numerical studies in order to improve their behavior.…”

Section: Introductionmentioning

confidence: 99%

“…However, it can be concluded based on refs. [51][52][53] that other forms of damage also occur and influence mechanical properties of laminate around the hole.…”

Section: Introductionmentioning

confidence: 99%

“…The aim of a series of papers (including refs. [53,62] and this paper) is analysis of the parameters determining the stiffness and strength of laminate in the area of mechanically fastened joints to develop a gradient material model.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

The Influence of Selected Local Phenomena in CFRP Laminate on Global Characteristics of Bolted Joints

et al. 2019

Self Cite

View full text Add to dashboard Cite

High specific mechanical properties of composites are the reason for their use in various fields, e.g., the aerospace industry. Mechanical joints are still used in the aerospace industry to assembly large aircraft structures. The properties of laminate around the hole can be, however, weakened, compared to their nominal values as a result of a drilling process or cyclic loading. This paper aims at the classification and analysis of imperfections affecting mechanically fastened joints in a laminate structure. A method of modeling the hole vicinity, a gradient material model, as well as the numerical and experimental estimation of laminate deterioration in this area, were proposed and analyzed. Comparative analysis of numerical and experimental results based on displacements of the testing machine grip and the extensometer length confirmed the aforementioned results as consistent in linear ranges. Therefore, joint characteristics obtained based upon measurement of the grip displacement and the ratio of stiffness in linear ranges are sufficient to determine the parameters of a gradient material model. Some imperfections resulting from, e.g., asymmetry, were included in the gradient material model; thus, the obtained weakening of laminate properties in the hole vicinity can be overestimated. Therefore, further analyses of the gradient material model for laminate structures are necessary.

show abstract

“…Parameters of HTA/913 lamina, TR30S lamina and interfaces are presented in ref. [53]. Pilot holes were made in each part.…”

Section: Object Of Analysismentioning

confidence: 99%

“…[64][65][66]. An average diameter of those areas is 11.25 mm and standard deviation is 1.26 mm [53].…”

Section: Object Of Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…However, it can be concluded based on refs. [51][52][53] that other forms of damage also occur and influence mechanical properties of laminate around the hole.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Influence of Selected Local Phenomena in CFRP Laminate on Global Characteristics of Bolted Joints

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

Sensitivity analysis of numerical model of CFRP mechanical joint

Puchała¹,

Szymczyk²,

Jachimowicz³

2019

AIP Conference Proceedings

View full text Add to dashboard Cite

Safety of Aircraft Structures in the Context of Composite Element Connection

Bielawski

Rządkowski

Kowalik

et al. 2020

IREASE

View full text Add to dashboard Cite

Recently, there has been a growing trend towards an ever greater use of composite materials in aircraft structures. This necessitates a search for effective ways of joining these materials. The desirable characteristics of such joints are predominantly high strength and low mass, both of which are features offered by rivet nuts. The study was conducted on one type of glass fabric material, from which two types of composite specimens were prepared. Each specimen used the same type of fibre of the same number of 3 layers, yet of different lay-up. Specimens were joined with aluminium alloy and steel rivet nuts to produce single and multi-row parallel models of riveted joints for further testing and analysis. The specimens were clamped in the grips of tensile machine and subjected to a tensile strength test. In the work, the course of the forces in the rivet nuts joint and the failure modes and effects of joint failure were analysed. The distribution of vertical displacement was examined according to the joint material and two fibre orientation variants. To determine the distribution of displacements, the FE (Finite Element) method was used. Upon completion of the experimental stage, the obtained results were subjected to comparative analysis.

show abstract

Gradient material model in analysis of mechanical joints of CFRP laminate

Cited by 3 publications

References 5 publications

The Influence of Selected Local Phenomena in CFRP Laminate on Global Characteristics of Bolted Joints

The Influence of Selected Local Phenomena in CFRP Laminate on Global Characteristics of Bolted Joints

Sensitivity analysis of numerical model of CFRP mechanical joint

Safety of Aircraft Structures in the Context of Composite Element Connection

Contact Info

Product

Resources

About