Variational analysis of cracked angle-ply laminates and things

Variational analysis of angleply laminates article pdf available in composites science and technology 704. A stressbased variational model is developed to study stiffness reduction and stress distribution in angleply laminates. Liewb a school of mechanical and electrical engineering, wuhan institute of technology, wuhan 430073, hubei, china bdepartment of civil and architectural engineering, city university of hong kong, tat chee avenue, hong kong article info article history. Variational analysis of freeedge stress and displacement fields in general. A variational model for stress analysis in cracked laminates. These specimens proved to be very much stronger than the results expected based on the tsai hill work. Stress redistribution in angleply laminates due to formation of intralaminar matrix cracks depends on the crack spatial distribution. Variational analysis for angleply laminates with matrix. Mesoscale analysis of plycracked composite laminates under inplane and flexural. Composite angle ply laminates and netting analysis 01pa3253 stress. Most of the existing approaches for stress analysis of a cracked laminate are either limited to crossply laminates or to symmetrical arrays of cracks. Vinogradov, v, hashin, z 2010 variational analysis of cracked angleply laminates.

Cracks observation for cfrp laminates is done by using the xray. Analysis of local delaminations in composite laminates with angle. Mechanics of materials 4 1985 1216 121 northholland analysis of cracked laminates. Pdf stress redistribution in angleply laminates due to formation of intralaminar matrix cracks depends on the crack spatial distribution. Variational analysis of cracked general crossply laminates under. Variational analysis for angleply laminates with matrix cracks article in international journal of solids and structures 512122 october 2014 with 29 reads how we measure reads. A unit cell based method is developed based on variational principles to derive the stress state and effective mechanical properties of angleply laminates of type. Nevertheless, the stress analysis of cracked laminates needed in stiffness reduction and. Cracked laminate in the original left and rotated right. The authors prefer to utilize a more rational way, which is an analytical solution. Variational analysis for angleply laminates with matrix cracks. The orientation of the ith layer is specified by the angle i i. All plausible matrix crack distribution patterns are considered and implementing the.

Discover more publications, questions and projects in variational analysis. As a matter of fact, the compliance of cracked laminate in crossply layups under. Prediction of ply crack evolution and stiffness degradation in. Analysis of local delaminations in composite laminates. Comparison of variational and generalized plane strain. Nasa technical memorandum 104076avscom technical report 91b011. More accurate prediction of stiffness reduction is possible with analytical models accounting for. Hashins research works tel aviv university, tel aviv tau and. Comparison to published experimental data demonstrates very good agreement between the prediction and the experimental measurements for the youngs modulus of glassepoxy 0 45 s laminate. Stiffness reduction of angleply laminates of the type. In the field of matrix cracks analysis for symmetric laminates, the present. However, the resulting strain would cause the reinforcement to rotate to a new angle. A variational model for stress analysis in cracked laminates with.