A Comparative Experimental Study on Tensile Properties of Three Types of High-Performance Polymer Fibers

2011 ◽  
Author(s):  
X.-L. Gao ◽  
S.-S. Zhou ◽  
S. E. Bosselman ◽  
J. Q. Zheng
Keyword(s):  
Experimental Study ◽  
Elastic Modulus ◽  
Tensile Properties ◽  
High Performance ◽  
Tensile Tests ◽  
Polymer Fibers ◽  
Breaking Stress ◽  
Strong Temperature Dependence ◽  
Breaking Strain ◽  
High Performance Polymer

A comparative experimental study on tensile properties of three types of high-performance polymeric fiber yarns — AuTx™, Kevlar® KM2 600 denier and Twaron® 500 denier — is conducted. Tensile tests are performed on samples of the three kinds of fiber yarns at five testing temperatures (24, 50, 60, 70 and 80 °C) and three loading rates (100, 200 and 300 mm/min). The elastic modulus, breaking stress, and breaking strain are obtained for each type of fiber yarns under specified testing conditions as averages of measured values from 15 specimens. The experimental data reveal that the tensile properties of all three types of fiber yarns under investigation exhibit strong temperature dependence, with the elastic modulus and breaking stress decreasing with the temperature increase. However, the dependency of the properties on the loading rate is insignificant for the range considered. The measured tensile properties of the Kevlar® and Twaron® yarns are seen to be close, while the elastic modulus and breaking stress of the AuTx™ yarn are found to be, respectively, about 12% and 40% higher than those of the Kevlar® and Twaron® fiber yarns. It is also observed that the AuTx™ yarn degrades about two times faster than the other two yarns as temperature increases.

The Prime Importance of Second-Order Effects in Rigid-Rod Polymers

1988 ◽  
Vol 134 ◽  
Author(s):  
Steven J. Deteresa ◽  
Richard J. Farris
Keyword(s):  
Compressive Stress ◽  
High Performance ◽  
Second Order ◽  
Shear Instability ◽  
Polymer Fibers ◽  
Order Effects ◽  
Axial Tensile ◽  
High Performance Polymer ◽  
Rigid Rod ◽  
Axial Compressive Stress

ABSTRACTThe torsion modulus of high performance rigid-rod polymer fibers is shown to be dependent on axial tensile stress. This behavior is one of at least second-order elasticity. Fiber ultimate tensile strengths are of the same magnitude as torsion moduli, and increases in torsion moduli in excess of 200% were observed for fibers under tension. Consideration of the effect of an axial compressive stress on fiber torsion modulus leads to a prediction of an elastic shear instability that initiates at a compressive stress approximately equal in magnitude to the zero-stress torsion modulus. Hence, it is concluded that the compressive strengths of high performance polymer fibers are limited by the onset of an elastic microstructural instability.

scholarly journals Surface Activation of High Performance Polymer Fibers: A Review

2022 ◽  
pp. 1-32
Author(s):  
Carolin Gleissner ◽  
Justus Landsiedel ◽  
Thomas Bechtold ◽  
Tung Pham
Keyword(s):  
High Performance ◽  
Polymer Fibers ◽  
Surface Activation ◽  
High Performance Polymer

Study on the Effects of the Self-Healing Microcapsules on the Tensile Properties of Polymer Composite

2011 ◽  
Vol 299-300 ◽  
pp. 460-465 ◽  
Author(s):  
Li Zhang ◽  
Xiu Ping Dong ◽  
Hao Chen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Glass Fiber ◽  
Tensile Properties ◽  
Polymer Composite ◽  
Tensile Tests ◽  
The Self ◽  
Self Healing ◽  
Glass Fiber Reinforced

By designing different formulations of composites and adopting optimized technology including extrusion and molding, the different composites with various content microcapsules were prepared. The results of the tensile tests show that with the increasing content of self-healing microcapsules in the glass fiber reinforced nylon composites, the mechanical properties of the composites will change, i.e. tensile strength, elastic modulus will decrease. But there is little effect on the mechanical properties of the composite gears if the content of self-healing microcapsules is less than 3.5%, and the technology of self-healing microcapsules used in the polymer composite gear is feasible.

scholarly journals Cervical Rotatory Manipulation Decreases Uniaxial Tensile Properties of Rabbit Atherosclerotic Internal Carotid Artery

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Shaoqun Zhang ◽  
Ji Qi ◽  
Lei Zhang ◽  
Chao Chen ◽  
Shubhro Mondal ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Tensile Properties ◽  
Internal Carotid ◽  
Tensile Tests ◽  
Normal Group ◽  
Uniaxial Tensile ◽  
Model Group ◽  
Main Effects

Objective. To investigate the effects of one of the Chinese massage therapies, cervical rotatory manipulation (CRM), on uniaxial tensile properties of rabbit atherosclerotic internal carotid artery (ICA).Methods. 40 male purebred New Zealand white rabbits were randomly divided into CRM-Model group, Non-CRM-Model group, CRM-Normal group, and Non-CRM-Normal group. After modeling (atherosclerotic model) and intervention (CRM or Non-CRM), uniaxial tensile tests were performed on the ICAs to assess the differences in tensile mechanical properties between the four groups.Results. Both CRM and modeling were the main effects affecting physiological elastic modulus (PEM) of ICA. PEM in CRM-Model group was 1.81 times as much as Non-CRM-Model group, while the value in CRM-Model group was 1.34 times as much as CRM-Normal group. Maximum elastic modulus in CRM-Model group was 1.80 times as much as CRM-Normal group. Max strains in CRM-Model group and Non-CRM-Model group were 30.98% and 28.71% lower than CRM-Normal group and Non-CRM-Normal group, respectively. However, whether treated with CRM or not, the uniaxial tensile properties of healthy ICAs were not statistically different.Conclusion. CRM may decrease the uniaxial tensile properties of rabbit arteriosclerotic ICA, but with no effect on normal group. The study will aid in the meaningful explanation of the controversy about the harmfulness of CRM and the suitable population of CRM.

Effect of Ti+, Ar+, N+ and He+ Ion Implantation on Aramid Fiber Adhesive Properties

1989 ◽  
Vol 170 ◽  
Author(s):  
J. Kalantar ◽  
D. S. Grummon ◽  
L. T. Drzal ◽  
I. H. Loh ◽  
R. A. Moody
Keyword(s):  
High Performance ◽  
Weak Interactions ◽  
Polymer Fibers ◽  
Environmental Stability ◽  
Adhesive Properties ◽  
Matrix Adhesion ◽  
High Performance Polymer ◽  
Reinforcement Fiber ◽  
Fiber Matrix ◽  
High Degree

AbstractComposites made with high performance polymer fibers can achieve axial properties comparable to those which use inorganic reinforcements, but with somewhat inferior interfacial properties. A high degree of chain alignment in polyaramids, such as Kevlar, produces weak interactions between adjacent polymers, resulting in poor transverse strength in the fiber, and low interfacial shear strength in composite systems. The latter controls many composite properties, such as transverse, shear and flexural strengths. Also, by reducing the tendency to form weak interfacial boundary layers, good fiber-matrix adhesion can enhance environmental stability. For these reasons, modifications to reinforcement fiber surfaces that promote fiber-matrix adhesion are frequently used to improve the performance of composites.

Effect of cold rolling and subsequent aging on tensile properties and thermoelastic coefficient of Ni-Span-C 902 superalloy

2020 ◽  
Vol 117 (4) ◽  
pp. 406
Author(s):  
Maryam Morakabati ◽  
Peyman Ahmadian ◽  
Mohammad Rasoul Moazami Goodarzi
Keyword(s):  
Elastic Modulus ◽  
Cold Rolling ◽  
Tensile Test ◽  
Tensile Properties ◽  
Aging Temperature ◽  
Tensile Tests ◽  
Subsequent Aging ◽  
Microstructural Evaluation ◽  
Different Temperatures ◽  
Cold Rolled

The influence of cold rolling and subsequent aging on tensile properties and thermoelastic coefficient (TEC) of Ni-Span-C 902 superalloy was investigated. The solution treated specimens conventionally cold rolled to 30–50% thickness reduction and subsequently aged at different temperatures ranging from 550 to 850 °C for 5 h. The results of room temperature tensile tests indicated that higher strength and elastic modulus are achieved by increasing the amount of reduction area from 30 to 50%. Also, the maximum tensile strength and elastic modulus are obtained in the specimens which were 50% cold-rolled and subsequently aged at 650 °C for 5 h. Microstructural evaluation revealed that fine and spherical γ’ phase with size of 80 ± 20 nm is precipitated during aging at 650 °C. By increasing aging temperature from 650 to 750 °C, coarse γ’ phase is obtained and consequently UTS is declined. The evolution of ɛ phase is observed as a result of aging at 850 °C. According to tensile test it can be demonstrated that ɛ phase decreases the UTS and increases the ductility of the alloy. Tensile test results in the range of 30–100 °C showed that by increasing the aging temperature from 550 to 650 °C, TEC increases and with increasing the amount of cold rolling from 30 to 50 pct, TEC decreases. Meanwhile the lowest TEC value is obtained with aging of the 50 pct cold-rolled specimens at 550 °C.

scholarly journals Functional Coatings on High‐Performance Polymer Fibers for Smart Sensing

2020 ◽  
Vol 30 (14) ◽  
pp. 1910555 ◽  
Author(s):  
Henning Galinski ◽  
Daniel Leutenegger ◽  
Martin Amberg ◽  
Fabio Krogh ◽  
Volker Schnabel ◽  
...  
Keyword(s):  
High Performance ◽  
Polymer Fibers ◽  
Functional Coatings ◽  
High Performance Polymer ◽  
Smart Sensing
Sign in / Sign up

Export Citation Format

Share Document