EFFECTS OF FREE EDGE INTERLAMINAR SHEAR STRESS ON THE RESIDUAL STRESSES OF POLYMER COMPOSITES USING HOLE DRILLING METHOD

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MEHRDAD SHOKRIEH MAHMOUD; GHASEMI A.R.

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Journal: Iranian Journal of Polymer Science and Technology Year:2007 | Volume:20 | Issue:4 (ISSUE NO. 90) Page(s): 337-347

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Information Journal Paper

Title

EFFECTS OF FREE EDGE INTERLAMINAR SHEAR STRESS ON THE RESIDUAL STRESSES OF POLYMER COMPOSITES USING HOLE DRILLING METHOD

Author(s)

MEHRDAD SHOKRIEH MAHMOUD | GHASEMI A.R. | Issue Writer Certificate

Keywords

INTERLAMINAR SHEAR STRESSQ3

HOLE DRILLING METHODQ3

RESIDUAL STRESSESQ3

SIMULATIONQ3

POLYMER COMPOSITEQ3

Abstract

In the traditional HOLE DRILLING METHOD the in-plane stresses are studied in detail and the interlaminar stresses are not taken seriously. The interlaminar stresses on the free edge of composite materials are important and can cause matrix cracking and delamination. Inserting holes in composite laminates causes free edges and it can induce interlaminar shear and normal stresses. In this research, using a finite element method and the simulated HOLE DRILLING METHOD for isotropic and orthotropic materials, the three dimensional state of stresses are studied. The number of steps for hole drilling, the uniform and non-uniform pre-stresses, and uniaxial and biaxial stresses are considered. The results show if the number of drilling steps changes from one to four, the ratio of the maximum three-dimensional stresses to the induced uniaxial stress is changed. The mechanical properties of each layer, number of layers, and the stacking sequence are important parameters for laminated composites. Therefore, unidirectional plies under uniaxial and biaxial state of stresses are considered. Then, the interlaminar stresses for the cross-ply, angle-ply and quasi-isotropic laminated are studied. The effects of interlaminar stresses on the RESIDUAL STRESSES on the point of measurement of strains by strain gauges are studied in detail.

Cites

RESIDUAL STRESSES IN THERMOPLASTIC COMPOSITES: A REVIEW

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APA: Copy

MEHRDAD SHOKRIEH, MAHMOUD, & GHASEMI, A.R.. (2007). EFFECTS OF FREE EDGE INTERLAMINAR SHEAR STRESS ON THE RESIDUAL STRESSES OF POLYMER COMPOSITES USING HOLE DRILLING METHOD. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 20(4 (ISSUE NO. 90)), 337-347. SID. https://sid.ir/paper/6281/en

Vancouver: Copy

MEHRDAD SHOKRIEH MAHMOUD, GHASEMI A.R.. EFFECTS OF FREE EDGE INTERLAMINAR SHEAR STRESS ON THE RESIDUAL STRESSES OF POLYMER COMPOSITES USING HOLE DRILLING METHOD. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2007;20(4 (ISSUE NO. 90)):337-347. Available from: https://sid.ir/paper/6281/en

IEEE: Copy

MAHMOUD MEHRDAD SHOKRIEH, and A.R. GHASEMI, “EFFECTS OF FREE EDGE INTERLAMINAR SHEAR STRESS ON THE RESIDUAL STRESSES OF POLYMER COMPOSITES USING HOLE DRILLING METHOD,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 20, no. 4 (ISSUE NO. 90), pp. 337–347, 2007, [Online]. Available: https://sid.ir/paper/6281/en

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