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# Mechanics of Composite Materials (v.40, #1)

Multifractal Parametrization of the Structure of Deformed Carbon Fibers by V. U. Novikov; L. P. Kobets; I. S. Deev (

*pp. 1-16*).

**Keywords:** microstructure; multifractal formalism; carbon fiber; parameter; deformation; mechanical properties; model; dimension; diagram

Longitudinal Flexure as a Method for Determining the Flexural Strength of Composite Materials by A. K. Arnautov; Yu. M. Tarnopol'skii (

*pp. 17-28*).

**Keywords:** advanced composites; test methods; thin bar; analytical model; flexural strength; longitudinal flexure; tension; buckling

A Study of the Relation between the Mechanical Properties and the Adhesion Level in a Laminated Packaging Material by S. Kao-Walter; J. Dahlström; T. Karlsson; A. Magnusson (

*pp. 29-36*).

**Keywords:** laminate; packaging material; mechanical properties

Limit Regimes of Braking of Disc-Type Composite Flywheels Made by Filament Winding by G. Portnov; I. Cruz; R. P. Fiffe; F. Arias (

*pp. 37-44*).

**Keywords:** flywheel; disk; composite; power; energy; braking; limit regime

Calculation of the Ultimate State of Reinforced Plastics and Unoriented Polymers in Asymmetric High-Cycle Tension–Compression by V. P. Golub; V. I. Krizhanovskii; A. D. Pogrebniak (

*pp. 45-56*).

**Keywords:** reinforced plastics; unoriented polymers; high-cycle loading; asymmetric cycle; fatigue failure; stress range diagrams; fatigue life

Effects of Moisture and Stresses on the Structure and Properties of Polyester Resin by E. A. Faitel'son; V. P. Korkhov; A. N. Aniskevich; O. A. Starkova (

*pp. 57-66*).

**Keywords:** polyester resin; moisture; creep; dilatometry; X-ray diffractometry; thermophysical characteristics

Evaluation of Deformation and Strength Characteristics of Composites Based on Low-Density Polyethylene and Linen Yarn Production Waste by the Methods of Mathematical Statistics by J. E. Lejnieks; J. A. Kajaks; S. A. Reihmane (

*pp. 67-74*).

_{max}and the elastic modulus

*E*

_{t}. For the other parameters (the relative elongation ε

_{max}corresponding to σ

_{max}, the specific total work of failure

*A*

_{b}), and the specific work of failure to the tensile strength

*A*

_{max}), a non-Gaussian distribution is observed. An analysis of measurements for different specimens by the Bartlett test shows that the

*E*

_{t}data have equal variances for both systems (with and without DIC), but for the system containing DIC, the σ

_{max}data have different variances. A two-factor ANOVA analysis reveals that DIC considerably affects the tensile strength and modulus of composites, but the influence of test conditions is a statistically significant factor only for the modulus. The coefficient of variation is considerably lower for σ

_{max}than for

*E*

_{t}and can be used as a quantitative measure for the degree of heterogeneity of the composites investigated.

**Keywords:** low-density polyethylene; linen waste; composites; deformation and strength characteristics; data analysis; mathematical statistics

Linear Viscoelasticity of Liquid-Crystalline Polymers by E. E. Jakobson; L. A. Faitel'son (

*pp. 75-86*).

*m*-cresol is carried out. It is stated that, if the material is characterized by some initial orientation, both components of the complex shear modulus contain a multiplier which depends on the degree of the initial orientation and increases the values of the components compared with those for an initially isotropic material. The model predicts that, in a periodic shear flow, the components of shear and normal stresses are constant and, like the components of shear modulus, are independent of deformation frequency. If the parameter

*d*

_{0}of the Akay–Leslie model is equal to zero, the values of its other parameters can be determined from experimental results on periodic shear flow.

**Keywords:** anisotropic viscoelastic liquid; linear viscoelasticity of liquid-crystalline polymer; complex normal-stress coefficient