On the feasibility of using thermal gradients for active control of interlaminar stresses in laminated composites

Kim, T.; Steadman, D.; Hanagud, S.; Atluri, Satya N.

doi:10.1016/s0168-874x(96)80016-3

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…In addition, shear lag effects associated with the adhesively bonded actuators, interaction with the host structure, and weight considerations further limit the efficiency of the control system. Kim et al [9,10] examined the feasibility of using thermally induced strains (which, in some cases, may be considered analogous to the piezoelectrically induced strains) to control the interlaminar stresses near the strait free edges of composite laminates. Although the analytical and experimental investigations confirmed that the stresses could be effectively controlled, application of this method in practice is rather complicated and limited.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric Control of Edge Debonding in Beams Strengthened with Composite Materials: Part II - Failure Criteria and Optimization

Rabinovitch

2007

Journal of Composite Materials

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The prevention of the edge debonding failure in RC beams strengthened with externally bonded composite materials by means of optimized piezoelectric control is investigated. The study uses the mathematical model derived and verified in Part I of this paper to assess the structural response of the strengthened beam to the electrical and mechanical loads. The electrical actuation is optimized using two objective functions corresponding to two approaches for the prediction of the debonding failure. The first approach is based on evaluation of the stresses at the critical region near the edge of the bonded strip. The second approach adopts the fracture mechanics concept of the energy release rate, which is evaluated through the generalized J-integral. The formulation of the objective functions and the constraints associated with the restricted operational range of the piezoelectric actuators is presented. A procedure for the construction of the linear or quadratic response and objective functions through a relatively small number of evaluations of the structural model is presented and discussed. A numerical optimization study that focuses on the ability of different combinations of piezoelectric actuators to control, prevent, or delay the edge debonding failure is presented. The main contribution of this study is in providing a systematic approach to optimize the piezoelectric control under different debonding failure criteria and in demonstrating the feasibility of using the piezoelectric system in the full-scale civil engineering structure.

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Section: Introductionmentioning

confidence: 99%

Piezoelectric Control of Edge Debonding in Beams Strengthened with Composite Materials: Part II - Failure Criteria and Optimization

Rabinovitch

2007

Journal of Composite Materials

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“…Avila and Tamma [2] carried out an integrated micro/macro thermo-elastic-viscoplastic analysis on laminate metal matrix composites. Kim et al [3] proposed a method to actively control interlaminar stresses near the free edges of laminated composites by through-thickness thermal gradients. Barnes [4] examined the thermal expansion behaviour of thermoplastic composites.…”

Section: Introductionmentioning

confidence: 99%

Elasto-plastic Thermal Stress Analysis in Symmetric Thermoplastic Laminates

Çallıoğlu

Sayman

Ataberk

2005

Journal of Thermoplastic Composite Materials

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In this study, a thermal elastic-plastic stress analysis is carried out in steel fiber-reinforced symmetric thermoplastic laminated plates. The material is assumed to be strain-hardening. Temperature distribution is chosen as þT 0 and ÀT 0 at the upper and lower surfaces, respectively. It is found that plastic yielding occurs at the same temperature; all the orientation angles and the plastic region expands the same at the same temperature.

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“…Meijer et al [10] investigated the influence of inclusion geometry and thermal residual stresses and strains on the mechanical behavior of an Al 2 O 3 particulate reinforced 6061-TO Al alloy metal-matrix composite by finite element method, the introduction of the residual thermal stress/strains prior to external loading leads to a decrease in the proportional limit, 0.2% offset yield stress and the apparent stiffness. Kim et al [11] proposed a method to actively control interlaminar stresses near the free edges of laminated composites by through thickness thermal gradients. Unger and Hansen [12] presented a method accounting for the effect of process-induced thermal residual stresses on the free-edge delamination behavior of fibre-reinforced laminates.…”

Section: Introductionmentioning

confidence: 99%

Thermal Residual Stresses in Aluminum Metal-Matrix Antisymmetric Laminated Plates Under Uniform Temperature Distribution

Sayman

Yeni

Toygar

et al. 2003

Journal of Reinforced Plastics and Composites

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Thermal stresses are of great importance in composite structures. In this investigation, a thermal elastic-plastic stress analysis is carried out in (0°/90°)2, (30°/−30°)2, (45°/−45°)2, (60°/−60°)2, (15°/−15°)2, (15°/30°)2, (15°/45°)2, (15°/60°)2 antisymmetric aluminum metal-matrix laminated plates. Temperature is chosen to be constant along the cross sections of the plates. The residual stress components of σ x, σ y and τ xy are illustrated in the layers of the laminated plates for different thermal loading. Elastic-plastic and residual stress components are given in tables. When the absolute value between the orientation angles of the layers is increased, the magnitude of the residual stress components becomes high. The strength of the laminated plates can be increased by using residual stresses. Tsai-Hill criterion is used as a yield criterion. Differential equations are solved numerically with a sufficiently large number of integration intervals of the temperature. The composite material is assumed to be linearly strain hardening.

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On the feasibility of using thermal gradients for active control of interlaminar stresses in laminated composites

Cited by 6 publications

References 12 publications

Piezoelectric Control of Edge Debonding in Beams Strengthened with Composite Materials: Part II - Failure Criteria and Optimization

Piezoelectric Control of Edge Debonding in Beams Strengthened with Composite Materials: Part II - Failure Criteria and Optimization

Elasto-plastic Thermal Stress Analysis in Symmetric Thermoplastic Laminates

Thermal Residual Stresses in Aluminum Metal-Matrix Antisymmetric Laminated Plates Under Uniform Temperature Distribution

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