Journal Article10.1177/002199838702101004
Laminated Composites Containing an Elliptical Opening. I. Approximate Stress Analyses and Fracture Models
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TL;DR: In this article, an approximate stress analysis for orthotropic composite laminates containing an elliptical opening under uniaxial normal loads is presented, using exact elasti city solution.
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Abstract: Approximate stress analyses are presented for orthotropic composite laminates contain ing an elliptical opening under uniaxial normal loads. Examining by the use of exact elasti city solution shows that these approximate solutions have excellent accuracy. Utilizing these solutions, the point stress fracture criterion and the average stress fracture criterion are generalized for the strength prediction of fiber-reinforced composite laminates contain ing an elliptical opening. Comparisons show that these models have good correlation with experimental data.
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Citations
Analysis of the open-hole compressive strength of spruce
TL;DR: In this article, the effect of the hole notch on the compressive strength of Sitka spruce was investigated, and it was revealed that the notch sensitivity was not so significant, and this tendency was more pronounced for the compression strength in the R direction than in the L direction.
Stress concentration issues in unidirectional laminates
TL;DR: In this article, the authors analyzed how elliptical holes affect the resistance of unidirectional laminate plates and found that the stress concentration may be up to about twice higher than for isotropic materials, and the notched strength is smaller than 10% of the unnotched strength.
The mechanical strength of polysilicon films: Part 2. Size effects associated with elliptical and circular perforations
TL;DR: In this article, a systematic study of failure initiation in small-scale specimens has been performed to assess the effect of size scale on failure properties by drawing on the classical analysis of elliptically perforated specimens.
Finite fracture mechanics analysis of crack onset at a stress concentration in a UD glass/epoxy composite in off-axis tension
TL;DR: In this article, the authors applied finite fracture mechanics to the analysis of cracking at a notch in a UD glass/epoxy composite subjected to tensile off-axis loading, based on UD composite strength and intralaminar toughness characterized by separate tests.
References
Stress Fracture Criteria for Laminated Composites Containing Stress Concentrations
J.M. Whitney,R.J. Nuismer +1 more
TL;DR: In this paper, two related criteria based on stress distribution are presented for predicting the uniaxial tensile strength of laminated composites containing through the thickness discontinuities of a general shape.
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Uniaxial Failure of Composite Laminates Containing Stress Concentrations
RJ Nuismer,JM Whitney +1 more
TL;DR: In this paper, two failure criteria for predicting the uniaxial tensile strength of a laminated composite containing through-the-thickness material discontinuities (notches) are subjected to further experimental scrutinization.
377
Approximate Stresses in an Orthotropic Plate Containing a Circular Hole
TL;DR: In this paper, an approximate solution in the form of a polynomial is presented for the normal stress distribution adjacent to a circular hole in an infinite orthotropic plate, and a comparison of the approximate solut...
178
Laminated Composites Containing an Elliptical Opening. II. Experiment and Model Modification
TL;DR: In this article, a modified model is presented that expresses the characteristic damage zone size as functions of the opening length and opening aspect ratio of orthotropic composite laminates containing an elliptical opening.
73
Notched Strength Prediction and Design of Laminated Composites Under In-Plane Loadings:
TL;DR: In this paper, two models based on the first-ply failure stresses of notched and unnotched laminates are developed for the strength prediction of composite laminate designs containing an opening under in-plane loadings.
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