Stress Distribution of the Composites Reinforced by Slub-Like Short Fibers

2007 ◽  
Vol 353-358 ◽  
pp. 389-391 ◽  
Author(s):  
Li Xin Dong ◽  
Guang Ze Dai ◽  
Xian Feng Zhou ◽  
L.L. Liu ◽  
Qing Qing Ni
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Textile Industry ◽  
Axial Stress ◽  
Interfacial Shear Stress ◽  
Interfacial Shear ◽  
Reinforced Composites ◽  
Stress Distributions ◽  
Short Fibers ◽  
The Matrix

The model of slub-like short fibers reinforced composites is suggested from the viewpoint of bamboo in the nature and patterns characteristic of simulated silk PET used in textile industry. The stress distributions in the enlarged-end fiber and in the matrix are analyzed. The axial stress in the fiber and matrix is found to increase and the interfacial shear stress decrease with the radius of the enlarged end.

Study on the Interfacial Shear Stress Distribution Characteristics of Geotechnical Prestressed Anchorage Structure

2014 ◽  
Vol 919-921 ◽  
pp. 773-776
Author(s):  
Si Feng Zhang ◽  
Long Zhang ◽  
Lin Li ◽  
Xiu Guang Song
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Model Test ◽  
Axial Stress ◽  
Interfacial Shear Stress ◽  
Tensile Load ◽  
Interfacial Shear ◽  
Shear Stress Distribution ◽  
Distribution Characteristics ◽  
Axial Stress Distribution

The ultimate bearing capacity of prestressed anchorage structure is directly related to the interfacial shear stress distribution characteristics of the inner anchorage section. Firstly, the axial stress distribution characteristics of the inner anchorage section for the geotechnical prestressed anchorage structure under tensile load are further studied by indoor similarity model test, and the corresponding fitting formula is established. Based on this result and the force equilibrium conditions of rod body’s micro-segment, the rod body interfacial shear stress distribution characteristics formula is also derived, which fits well with the results of the indoor model test. The research achievements have important significance for the further study on stress distribution characteristics of the inner anchorage section.

Stress Distributions During Fiber Pull-Out

1996 ◽  
Vol 63 (2) ◽  
pp. 301-306 ◽  
Author(s):  
R. Krishna Kumar ◽  
J. N. Reddy
Keyword(s):  
Stress Distribution ◽  
Axial Stress ◽  
Friction Stress ◽  
Stress Distributions ◽  
Pull Out ◽  
Reinforced Composite ◽  
First Case ◽  
The Matrix ◽  
Axial Stress Distribution ◽  
Perturbed Lagrangian

Fiber pull-out resistance is an important mechanism of energy absorption during the failure of fiber-reinforced composite materials. This paper deals with axial stress distribution in the fiber during a pull-out. The frictional constraint between the fiber and the matrix is modeled with a perturbed Lagrangian approach and Coulomb’s law of friction. Stress distribution has been determined for three cases, using the finite element method. The first case deals with the pull out of a fully embedded fiber. The second determines the stress distribution during fiber pull-out in the presence of a broken-embedded fiber. The third model attempts to solve the pull out of a coated fiber. The results for the first case compares favorably with those in existing literature. A local “pinching” effect, due to the matrix collapse behind the pulled fiber, is brought out clearly by this model. The second study indicates that the “plug” effect may not be significant in affecting the stress distribution. Lastly, the effects of coating stiffness and thickness are investigated.

Interfacial shear stress distribution in model composites: the effect of fibre modulus

Composites ◽  
1993 ◽  
Vol 24 (6) ◽  
pp. 459-466 ◽  
Author(s):  
N. Melanitis ◽  
C. Galiotis ◽  
P.L. Tetlow ◽  
C.K.L. Davies
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Interfacial Shear Stress ◽  
Interfacial Shear ◽  
Shear Stress Distribution

Effect of interfacial debonding on stress transfer in graphene reinforced polymer nanocomposites

2017 ◽  
Vol 27 (7) ◽  
pp. 1105-1127 ◽  
Author(s):  
Meghdad Heidarhaei ◽  
M Shariati ◽  
HR Eipakchi
Keyword(s):  
Shear Stress ◽  
Polymer Nanocomposites ◽  
Applied Stress ◽  
Volume Fraction ◽  
Axial Stress ◽  
Interfacial Shear Stress ◽  
Stress Transfer ◽  
Interfacial Shear ◽  
Zone Model ◽  
Reinforced Polymer

A shear-lag analysis hybrid cohesive zone model is employed to investigate the stress transfer from polymer matrix to the graphene by considering the interfacial damage and debonding phenomena in graphene reinforced polymer nanocomposites. The applied stress can produce three cases for interface treatment: entirely intact, damaged and debonded. By using analytical derived relations, the distribution of axial stress in the graphene and interfacial shear stress at the three-mentioned states is determined and the applied stress to the nanocomposite which leads to damage and debonding initiation at the interface is evaluated. In addition, a sensitivity analysis is performed and the effects of graphene length, interfacial shear strength and graphene volume fraction on the axial stress of graphene, damage and debonding threshold stress along the interface and interfacial shear stress are studied. The results show that after applying a stress called second critical stress, the stress transfer between graphene and matrix at the bulk of graphene length (about 75% of the interface) stops due to debonding of this zone.

scholarly journals Effect of a Bio-Based Dispersing Aid (Einar® 101) on PLA-Arbocel® Biocomposites: Evaluation of the Interfacial Shear Stress on the Final Mechanical Properties

Biomolecules ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1549
Author(s):  
Laura Aliotta ◽  
Vito Gigante ◽  
Patrizia Cinelli ◽  
Maria-Beatrice Coltelli ◽  
Andrea Lazzeri
Keyword(s):  
Mechanical Properties ◽  
Shear Stress ◽  
Quantitative Estimation ◽  
Interfacial Shear Stress ◽  
Impact Resistance ◽  
Cellulose Fibers ◽  
Interfacial Shear ◽  
Analytical Models ◽  
Poly Lactic Acid ◽  
The Matrix

In this paper, the production and the characterization of poly (lactic) acid (PLA)-based composites containing different amounts (from 10 wt.% to 25 wt.%) of ultra-short cellulose fibers (Arbocel 600 BE/PU) have been investigated. On the basis of a previous study, it was observed that the addition of the cellulose fibers led to an embrittlement of the composite. Consequently, in order to obtain a composite with enhanced impact resistance and elongation at break, the effect of the Einar 101 addition (a bio-based dispersing aid additive) was analyzed. The role of the adhesion between the fiber and the matrix, coupled with a better fiber dispersion, was thus evaluated. Also, the consequences on the final mechanical properties (tensile and impact test) caused by the Einar addition were investigated. Analytical models were also applied in order to obtain an evaluation of the variation of the interfacial shear stress (IFSS) (strictly correlated to the fiber-matrix adhesion) caused by the Einar introduction. Furthermore, due to the very low aspect ratio of the Arbocel fibers, a suitable Bader and Boyer model variation was adopted in order to have a better quantitative estimation of the IFSS value.

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