Experimental study of failure and failure progression in T-stiffened skins

Vijayaraju, K.; Mangalgiri, Prakash D.; Dattaguru, B.

doi:10.1016/j.compstruct.2003.08.007

Cited by 29 publications

(22 citation statements)

References 13 publications

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“…Failure for stiffened skin during pull-off test usually initiates at two locations: one is at the core filler intersection and the other is at the tip of stiffener foot for prepreg stiffened skin [23]. It is necessary to consider the relationship between different filler materials and failure properties of stiffened skin through pull-off test.…”

Section: Influences Of Core Filler Materials On Pull-off Propertymentioning

confidence: 99%

Investigation of carbon fiber composite stiffened skin with vacuum assisted resin infusion/prepreg co-curing process

et al. 2014

Sci. China Technol. Sci.

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Co-cured vacuum assisted resin infusion process (co-VARI process), which combined vacuum assisted resin infusion (VARI) with prepreg vacuum bag only process (VBO), was adopted to fabricate T-shaped stiffened skin with non-crimp fabric (NCF) stiffener and prepreg skin. During compaction stage of co-VARI process, prepreg resin impregnated fiber fabric under elevated temperature and vacuum pressure. This phenomenon was characterized by fluorescent micrographs with different holding temperature and time. Its influences on processing quality and mechanical performance for co-VARI stiffened skin with different filler materials at triangular region were further analyzed by optical micrographs and pull-off test, respectively. The results show that increasing holding temperature and prolonging holding time can promote prepreg resin impregnation in fiber fabric. Moderate prepreg resin impregnation is favorable to reduce resin rich region and increase fiber volume fraction at prepreg-fabric interface. Moreover, prepreg resin impregnation effect plays significant roles on pull-off performance for co-VARI stiffened skin with fabric filler but has negligible influences on specimens with prepreg filler. In addition, compared with stiffened skin with fabric filler, superior processing quality and pull-off performances are achieved for co-VARI stiffened skin with prepreg core filler. These results are helpful to optimize processing procedures and fabricate composite structure by co-VARI process.polymer-matrix composites, prepreg, vacuum assisted resin infusion, stiffened skin structure, co-curing Citation:Ma X Q, Gu Y Z, Li M, et al. Investigation of carbon fiber composite stiffened skin with vacuum assisted resin infusion/prepreg co-curing process.

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Section: Influences Of Core Filler Materials On Pull-off Propertymentioning

confidence: 99%

Investigation of carbon fiber composite stiffened skin with vacuum assisted resin infusion/prepreg co-curing process

et al. 2014

Sci. China Technol. Sci.

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“…To simulate the failure of three different specimens, loading conditions similar to the conditions as imposed on the specimen by Vijayraju [9] are applied. In experimental setup, holes are provided for clamping the specimen.…”

Section: Resultsmentioning

confidence: 99%

“…Nodes on the periphery of holes located on the skin are fixed as a constraint boundary condition. Three different configurations with two fixture types, FA (130 mm unsupported span) and FB (115 mm unsupported span) are studied in the experimental work [9]. The specimens tested with FA type fixtures are considered for the FE analysis in the current study, i.e.…”

Section: Resultsmentioning

confidence: 99%

“…The FE model uses a non-linear contact target element-based cohesive zone material and assumes the adhesive layer with linear elastic behaviour and a constant Young's modulus and Poisson's ratio. The results of the FE analysis are compared and validated using published experimental results [9]. The study also provides a deep insight to the methodology of FE modelling of joint in ANSYS Ò APDL.…”

Section: Introductionmentioning

confidence: 96%

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Mixed mode cohesive zone modelling and analysis of adhesively bonded composite T-joint under pull-out load

Sane

Padole

Manjunatha

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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The failure behaviour of three different configurations of adhesively bonded carbon fibre composite T-joints subjected to pull-out load is investigated. Finite element analysis is carried out on the carbon fibre composite T-joint models. A nonlinear, contact target-based cohesive zone model with appropriate traction separation law is selected to simulate the pullout test condition in FE package ANSYS Ò. The FE analysis results are in close agreement with available experimental results.

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“…A large body of experimental and analytical work performed by a number of researchers [1][2][3][4][5] has focused on the failure behavior of Tstiffened panels during post-buckling, bending and tension conditions. Particular restriction was placed on the structural analysis to investigate the effect of structural parameters on the tensile strength of T-stiffened panels.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Compaction and Tensile Strength of Co-cured Skin-to-Stiffener Structures

Wang

Xie

et al. 2010

Appl Compos Mater

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The integral technology of co-curing has been attracted increasing attention due to its resulting in fewer parts and reduction the assembly times and cost of aircraft structures. In this study, an experimental co-curing technique was applied to fabricate Tstiffened panels in the autoclave, with an emphasis to investigate experimentally on the influence of tool assembly schemes on the manufacture and performance evaluation of cocured panels. The pressure transferring characteristic of the tools was measured. The thickness analysis and the microscopy observation were examined to discuss the influence of various tool assembly schemes on the compaction of T-stiffened panels. Moreover, a special pull-off test was performed to evaluate the effect of the manufacturing quality on the mechanical performance. The experimental results indicated that during co-curing period, an interesting observation was found that the manufacturing quality of T-stiffened panels was significantly influenced by a position limit for the tools. In case of absence of a position limit for the tools, a micro-cut showed that the fiber waviness obviously appeared in skins and stiffener corners of T-stiffened panels, which was extremely attributed to the pressure distribution in stiffener corners. Applying a position limit for the tools can effectively eliminate the fiber waviness in stiffener corners and a well consolidated Tstiffened panel with uniform thickness was obtained, almost free of fiber waviness and resin-rich defect. Under tension condition, the fiber waviness in stiffener corners remarkably caused a decrease of the initial damage load, but showed no significant influence on the peak load.

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Experimental study of failure and failure progression in T-stiffened skins

Cited by 29 publications

References 13 publications

Investigation of carbon fiber composite stiffened skin with vacuum assisted resin infusion/prepreg co-curing process

Investigation of carbon fiber composite stiffened skin with vacuum assisted resin infusion/prepreg co-curing process

Mixed mode cohesive zone modelling and analysis of adhesively bonded composite T-joint under pull-out load

Experimental Investigation of the Compaction and Tensile Strength of Co-cured Skin-to-Stiffener Structures

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