scholarly journals Tensile Behavior of Low Density Thermally Bonded Nonwoven Material

2009 ◽  
Vol 4 (1) ◽  
pp. 155892500900400 ◽  
Author(s):  
Xiaonan Hou ◽  
Memiş Acar ◽  
Vadim V. Silberschmidt
Keyword(s):  
Tensile Loading ◽  
Nonwoven Material ◽  
Tensile Tests ◽  
Specimen Size ◽  
Tensile Behavior ◽  
Uniaxial Tensile ◽  
Low Density ◽  
Uniform Microstructure ◽  
Deformational Behavior ◽  
And Performance

A discontinuous and non-uniform microstructure of a low-density thermally bonded nonwoven material displays in a complicated and unstable tensile behavior. This paper reports uniaxial tensile tests of a low density thermally bonded nonwoven to investigate the effect of the specimen size and shape factor, as well as the cyclic tensile loading conditions employed to investigate the deformational behavior and performance of the nonwoven at different loading stages. The experimental data are compared with results of microscopic image analysis and FE models.

scholarly journals Uniaxial Tensile Behavior of Carbon Textile Reinforced Mortar

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 374 ◽  
Author(s):  
Fen Zhou ◽  
Huanhui Liu ◽  
Yunxing Du ◽  
Lingling Liu ◽  
Deju Zhu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Bond Strength ◽  
Volume Fraction ◽  
Tensile Tests ◽  
Optical Microscope ◽  
Tensile Behavior ◽  
Reinforcement Ratio ◽  
Steel Fibers ◽  
Uniaxial Tensile ◽  
Textile Reinforced Mortar

This paper investigates the effects of the reinforcement ratio, volume fraction of steel fibers, and prestressing on the uniaxial tensile behavior of carbon textile reinforced mortar (CTRM) through uniaxial tensile tests. The results show that the tensile strength of CTRM specimens increases with the reinforcement ratio, however the textile–matrix bond strength becomes weaker and debonding can occur. Short steel fibers are able to improve the mechanical properties of the entire CTRM composite and provide additional “shear resistant ability” to enhance the textile– matrix bond strength, resulting in finer cracks with smaller spacing and width. Investigations into the fracture surfaces using an optical microscope clarify these inferences. Increases in first-crack stress and tensile strength are also observed in prestressed TRM specimens. In this study, the combination of 1% steel fibers and prestressing at 15% of the ultimate tensile strength of two-layer textiles is found to be the optimum configuration, producing the highest first-crack stress and tensile strength and the most reasonable multi-cracking pattern.

Tensile testing low density multilayers: Aluminum/titanium

1998 ◽  
Vol 13 (10) ◽  
pp. 2902-2909 ◽  
Author(s):  
D. Josell ◽  
D. van Heerden ◽  
D. Read ◽  
J. Bonevich ◽  
D. Shechtman
Keyword(s):  
Thin Films ◽  
Yield Stress ◽  
Tensile Testing ◽  
Tensile Tests ◽  
Uniaxial Tensile ◽  
Low Density ◽  
Multilayer Thin Films ◽  
Bilayer Thickness ◽  
Relationship Of ◽  
The Relationship

Yield stresses, ultimate tensile strengths, and specific strengths of aluminum/titanium multilayer thin films are determined from the results of uniaxial tensile tests. The plasticity in the stress-strain curves, the nature of the fracture surfaces, and the relationship of the yield stress and the bilayer thickness are discussed. Properties are compared with those of other multilayer materials published in the literature.

scholarly journals Effect of microstructure on the formability of Ti21S alloy

2021 ◽  
Author(s):  
Cai Hu ◽  
Lionel Leotoing ◽  
Philippe Castany ◽  
Dominique Guines ◽  
Thierry Gloriant
Keyword(s):  
Titanium Alloys ◽  
Weight Ratio ◽  
Tensile Tests ◽  
Forming Limit ◽  
Uniaxial Tensile ◽  
Β Phase ◽  
Wide Range ◽  
Tension State ◽  
And Performance ◽  
Effect Of Microstructure

Titanium alloys find a wide range of uses, especially in the aeronautic industry because of a combination of favorable specifications in terms of strength-to-weight ratio, corrosion resistance and performance at high temperature. If many works are interested in mechanical properties, as well as microstructure, few of them studied the effect of microstructure on formability. The aim of this work is to study the influence of the microstructure on the formability of β metastable titanium alloys (Ti21S) which are increasingly used in aeronautical applications. For this purpose, two different heat treatments are performed on Ti21S alloy in order to propose different microstructures. Based on uniaxial tensile tests, the elastoplastic hardening behavior and the limit strain in the uniaxial tension state are obtained and allow to determine one point of the forming limit curve (FLC). From these experimental observations, it is shown that the microstructure has an important effect on the formability: precipitation of α phase reduces the formability in comparison with full β phase microstructure. Finally, a finite element M-K model is used and calibrated to predict the whole FLC for the different investigated microstructures.

scholarly journals Experimental Research and Simulation on the Mechanical Performance Degradation of Corroded Stud Shear Connectors

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Bing Wang ◽  
Xiaoling Liu ◽  
Jiantao Du
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Corrosion Rate ◽  
Mechanical Performance ◽  
Volume Fraction ◽  
Tensile Tests ◽  
Tensile Behavior ◽  
Uniaxial Tensile ◽  
Element Analysis ◽  
Gtn Model

Electrochemical accelerated corrosion and tensile tests were conducted on six series of 30 stud specimens in this study to assess the various mechanical properties in corroded stud connectors. The results indicate that there is a gradual decline in mechanical properties (e.g., yield strength, ultimate strength, and plasticity) as stud corrosion rate increases. Degradation equations for these parameters were established via fitting analysis on the test data. A Gurson–Tvergaard–Needleman (GTN) constitutive model describing the tensile behavior of corroded studs was established based on mesodamage mechanics and finite element analysis. In the GTN model, the corrosion rate equals the original void volume fraction; the trial-and-error method was adopted to determine the relationship between the corrosion rate and material failure parameters. The finite element simulation results are in good agreement with the experimental results. The GTN model accurately simulates the uniaxial tensile behavior of the corroded stud.

scholarly journals Effect of Textile Characteristics on the AR-Glass Fabric Efficiency

Textiles ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 387-404
Author(s):  
Marco Carlo Rampini ◽  
Giulio Zani ◽  
Louis Schouler ◽  
Matteo Colombo ◽  
Marco di Prisco
Keyword(s):  
Tensile Tests ◽  
Glass Fabric ◽  
Uniaxial Tensile ◽  
Cementitious Composites ◽  
Cost Ratio ◽  
Efficiency Evaluation ◽  
Cementitious Composite ◽  
And Performance ◽  
Huge Variety

Alkali-resistant (AR) glass textiles are used as the main reinforcement in several composite applications due to their good performance-to-cost ratio. A huge variety of textiles are already present in the market; they differ on various parameters, such as, for example, the filaments’ diameters, the geometry, the type of weaving, or the nature of the impregnation coating. To orient manufacturers towards the production of efficient textiles, the most important aspect is the balance between cost and performance. In this paper, a series of different fabrics designed for textile-reinforced cementitious composites were considered. Performance was assessed by means of uniaxial tensile tests and the results are presented in terms of load vs. displacement. Then, the selected AR-glass textiles were compared in terms of fabric efficiency, targeting the effect of each parameter on the textile capacity. The research here presented is part of a comprehensive campaign aimed at the optimization of glass-fabric-reinforced cementitious composites for structural retrofitting. To better discuss the different solutions tested, at the end, only considering a small number of the investigated textiles, an efficiency evaluation was carried out at the cementitious composite level.

scholarly journals Analysis of tensile behavior of recycled aggregate concrete using acoustic emission technique

2020 ◽  
Vol 5 ◽  
pp. 131-140
Author(s):  
Natalie Williams Portal ◽  
Mathias Flansbjer ◽  
Diego Carró-Lopez ◽  
Ignasi Fernandez
Keyword(s):  
Acoustic Emission ◽  
Crack Initiation ◽  
Tensile Tests ◽  
Tensile Behavior ◽  
Recycled Concrete ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Uniaxial Tensile ◽  
Concrete Aggregate ◽  
Softening Behavior

Recycled concrete aggregate (RCA) was processed from reinforced concrete edge beams sourced from a demolished bridge. This material replaced different ratios of coarse aggregate in a benchmark concrete. The tensile behavior of the developed concrete mixes was characterized via monotonic and cyclic uniaxial tensile tests performed on notched cylinders. Such tensile tests allow for the quantification of the fracture energy and softening behavior of the concrete. Moreover, acoustic emission (AE) measurements were conducted in conjunction with the cyclic tests to characterize e.g. micro-crack initiation and development, as well as crack localization. The tensile behavior of the various materials was found to be similar with minimal variation in the results. However, the softening behavior suggests that the RCA materials are slightly more brittle compared to both the mother and benchmark materials. The corresponding AE measurements also indicated similarities between the micro-crack initiation and development for these mixes. It can be constituted that if the concrete used to produce RCA is of high quality and from one source, the resulting RAC will have adequate tensile properties with minimal variation, despite the aggregate replacement ratio.

HIGH-RATE TENSILE BEHAVIOR OF SILICONE RUBBER AT VARIOUS TEMPERATURES

2020 ◽  
Vol 93 (1) ◽  
pp. 183-194 ◽  
Author(s):  
Lingmei Guo ◽  
Yang Wang
Keyword(s):  
Strain Rate ◽  
Silicone Rubber ◽  
Tensile Tests ◽  
Tensile Behavior ◽  
High Rate ◽  
Uniaxial Tensile ◽  
Strain Rates ◽  
Strain Behavior ◽  
Split Hopkinson ◽  
Increasing Temperature

ABSTRACT The effects of strain rate and temperature on the tensile behavior of silicone rubber were investigated. The quasi-static uniaxial tensile experiments were conducted using an electromechanical testing system, and the high-rate uniaxial tensile tests were performed employing a modified split Hopkinson tension bar technique for low-strength and low-impedance materials. The tensile responses were obtained at strain rates of 0.001–1400 s−1 and temperatures ranging from −50 to 50 °C. The experiments reveal that the tensile stress–strain behavior of silicone rubber is nonlinear and highly dependent on strain rate and temperature. The values of stiffness and nominal stress at a given elongation increase with increased strain rate and decrease with increasing temperature. It is appropriate to postulate that the tensile response at high strain rates arises from the combination of hyperelasticity and viscoelasticity. According to the incompressibility assumption, a phenomenologically inspired visco-hyperelastic model was proposed to describe the constitutive behavior of silicone rubber over wide ranges of strain rates and temperatures.

Influences of Specimen Size and Temperature on Viscoelastic Tensile Properties of SU-8 Photoresist Films

2016 ◽  
Vol 138 (2) ◽  
Author(s):  
Takahiro Namazu ◽  
Kenichi Takio ◽  
Shozo Inoue
Keyword(s):  
Stress Relaxation ◽  
Test Temperature ◽  
Fracture Strain ◽  
Thick Films ◽  
Tensile Tests ◽  
Specimen Size ◽  
Uniaxial Tensile ◽  
Apparent Thickness ◽  
The Mean ◽  
Apparent Activation Energies

In this paper, the influences of specimen size and test temperature on the viscoelastic properties of SU-8 photoresist films are described. Films with the thicknesses of 1 μm and 10 μm are subjected to quasi-static uniaxial tensile tests and stress relaxation tests at temperatures ranging from 293 K to 473 K. The average glassy modulus at 293 K is 3.2 GPa, which decreases with an increase in the test temperature irrespective of specimen size. The mean fracture strain depends on film thickness as well as temperature. The fracture strain of the 1-μm thick films is approximately half of that of the 10-μm thick films at each temperature. Stress relaxation tests are conducted for constructing the master curves of the relaxation moduli. There is no apparent thickness dependence on the master curve. Above glass transition temperature, Tg, apparent activation energies for the two films are almost identical, whereas the activation energy for the thinner films is smaller than that for the thicker films below Tg. This size effect is discussed using Fourier transform infrared spectroscopy (FTIR).

Modeling hyperviscoelastic behavior of elastomeric materials (HDPE/POE blend) at different dynamic biaxial and uniaxial tensile strain rates by a new dynamic tensile-loading mechanism

2019 ◽  
Vol 52 (4) ◽  
pp. 285-303
Author(s):  
E Aligholizadeh ◽  
M Yazdani ◽  
H Sabouri
Keyword(s):  
Tensile Strain ◽  
Testing Machine ◽  
Tensile Loading ◽  
Tensile Tests ◽  
Impact Testing ◽  
Material Behavior ◽  
Uniaxial Tensile ◽  
Strain Rates ◽  
Elastomeric Materials ◽  
Dynamic Tensile Loading

This article presents a new model developed to investigate hyperviscoelastic behavior of elastomeric materials/polyolefin elastomers (HDPE/POE blend) under dynamic biaxial and uniaxial tensile loading. Various strain energy functions (SEF) have been used in this model, and their capability to predict hyperelastic behavior of the aforementioned materials was validated by experimental data. In the experimental part, a new dynamic tensile-loading mechanism was designed and developed to be mounted on a drop-weight impact-testing machine. As a novelty, this mechanism has the ability to perform either uniaxial or biaxial dynamic tensile tests for any type of material, especially for investigating the hyperviscoelastic behavior of materials like elastomers at various strain rates. In addition, a new hyperviscoelastic model has been developed for elastomeric material, which can predict the behavior of the material well at different strain rates. By increasing the strain rate in the dynamic biaxial and uniaxial loading, Pucci–Saccomandi and Yeoh SEF predicted the dynamic behavior of material well due to its lower root mean square error. In fact, in this case, these functions are more capable than Mooney–Rivlin, Neo-Hookean, and polynomial SEF in predicting the effect of the strain rates. In addition, the results show that Yeoh SEF performs much better than the other SEFs in predicting the material behavior in cases of dynamic biaxial and uniaxial tensile strain. The results also indicated that the newly designed mechanism was capable of performing dynamic tensile loading and extracting its accurate results and could reduce the cost of testing compared to other methods.

Tensile Behavior of Semi-Solid C38 LTT Steel

2016 ◽  
Vol 256 ◽  
pp. 100-104 ◽  
Author(s):  
Khalil Traidi ◽  
Véronique Favier ◽  
Philippe Lestriez ◽  
Karl Debray ◽  
Laurent Langlois ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Joule Heating ◽  
Tensile Loading ◽  
Tensile Behavior ◽  
Uniaxial Tensile ◽  
Heating Effect ◽  
Experimental Protocol ◽  
Tensile Response ◽  
Semi Solid

The high temperature range for steel semi-solid state makes the experiments particularly challenging. While the response under shear or compression loadings was studied, few results concerned the response under tensile loading. In this paper, an experimental protocol was determined to characterize the uniaxial tensile response of the so-called C38 LTT steel with a Gleeble simulator. The specimen was heated by the Joule heating effect at around 10°C/s. The temperature was measured during the tests using an ultraviolet pyrometer. The variation in both ductility and strength of the material with temperature has been identified. The solidus-liquidus range was found to be shifted to lower temperatures.

Sign in / Sign up

Export Citation Format

Share Document