Methods of testing plastics Methods 302, 303, 304 and 305 elastic modulus in tension, crushing strength, cross breaking strength and sheer strength.

1957 ◽  
Keyword(s):  
Elastic Modulus ◽  
Breaking Strength ◽  
Crushing Strength

Experimental Study of Mechanical Properties of Fiber of Deep-Sea Mooring Cables

2011 ◽  
Vol 130-134 ◽  
pp. 1712-1715
Author(s):  
Gai Li Zhou ◽  
Linan Li ◽  
Shui Jiao Li ◽  
Shi Bin Wang
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Deep Sea ◽  
Performance Test ◽  
Breaking Strength ◽  
Fiber Strength ◽  
Experimental Studies ◽  
Strength Properties ◽  
Mooring Lines ◽  
Strength Performance

In order to learn the mechanical properties of deep-sea mooring lines, experimental studies involved in strength properties have been carried out in this thesis. In the fiber strength performance test, the small force-large deformation experimental device has been designed and optimized. As the fiber diameter is very small (about 40μm), microscope is chosen to measure the diameter. The intensity curve of fiber is divided into three typical phases. The yield strength, breaking strength and elastic modulus in initial stage can be calculated and the elastic modulus is basically a constant. With the increasing of loading rate, the breaking force reduces and gradually tends to stabilize. It has got the formula, breaking strength ∝.

Relationships between the Wear of Polymers and their Mechanical Properties

1968 ◽  
Vol 183 (16) ◽  
pp. 98-106 ◽  
Author(s):  
J. K. Lancaster
Keyword(s):  
Mechanical Properties ◽  
Steady State ◽  
Elastic Modulus ◽  
Wear Rate ◽  
Room Temperature ◽  
Breaking Strength ◽  
Relative Proportion ◽  
Wear Rates ◽  
Significant Parameter ◽  
Minimum Wear

The influence of some mechanical properties of polymers—hardness, elastic modulus, breaking strength and elongation to break—on their wear rates against a metal counterface has been determined at various temperatures. Many polymers exhibit a minimum wear rate at a particular temperature. The relative proportion of plastic to elastic deformation, characterized by the ratio of hardness to elastic modulus, is almost independent of temperature for most polymers. Variations in this ratio are therefore insufficient to explain the observed changes in wear rate. In contrast, the product of the breaking strength S and the elongation to break is a very significant parameter. In conditions of abrasive wear, there is an approximately linear relationship between the room temperature values of 1/ Sε for a large number of polymers and their wear rates. In steady-state sliding conditions, however, this relationship no longer applies because of the complicating effects of transfer of polymer to the counterface.

The Influence of Coating on the Elastic Modulus of Basalt Filament Diaphragm Fabric

2011 ◽  
Vol 189-193 ◽  
pp. 818-822
Author(s):  
Zong Fu Guo ◽  
Zhi Li Zhong
Keyword(s):  
Elastic Modulus ◽  
Glass Fiber ◽  
Coating Thickness ◽  
Theoretical Basis ◽  
Breaking Strength ◽  
Testing Machine ◽  
Curing Temperature ◽  
Curing Time ◽  
Fabric Density ◽  
Market Competitiveness

This paper focuses on the influences of the technologies such as curing time, curing temperature and coating on the elastic modulus of basalt filament diaphragm fabric. This paper compares the elastic modulus of basalt filament diaphragm fabric with that of glass fiber diaphragm fabric under the same fabric density, texture and coating thickness, thus discusses the feasibility of using basalt filament as cone material. In the experiment, we use CSW-03 loom to weave basalt filament diaphragm fabric and glass fiber diaphragm fabric, then we use Werner Mathis AG LTF97885 coating machine to coat them and then use 3380Instron advanced testing machine to test the elastic modulus and the breaking strength. Conclusion: The coating curing effect, the elastic modulus and the breaking strength will reach their best when the temperature is 120°C, the time is 30 minutes. When the coating thickness is 0.05mm, the elastic modulus of basalt filament diaphragm fabric will be best. So considering the elastic modulus, basalt filament diaphragm fabric is more suitable than glass fiber diaphragm fabric. The result of this paper can be used as theoretical basis for the development of basalt filament diaphragm fabric. So we can develop more materials related to basalt filament diaphragm fabric to enhance market competitiveness.

Effect of Cr/Mo on Microstructure and Mechanical Properties of Ti-Al-Nb Alloy

2018 ◽  
Vol 936 ◽  
pp. 178-186
Author(s):  
Zhu Hang Jiang ◽  
Ning Li ◽  
Cheng Zhi Zhao ◽  
He Xin Zhang ◽  
Zhi Ming Li
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Elevated Temperature ◽  
Grain Orientation ◽  
Breaking Strength ◽  
Alloying Elements ◽  
Air Cooling ◽  
Homogenization Treatment ◽  
Compression Properties ◽  
Variable Content

Effects of alloying elements (i.e., variable content of Mo and C) on the microstructure and compression properties of four types of experimental material based on TiAl-based alloy containing 8 at.% Nb were investigated. The specimens were prepared by vacuum noncollapsable melting technology and followed by a homogenization treatment with air cooling. The compression properties at room and at elevated temperature were evaluated in laboratory air. The results demonstrate that the inter-lamellar space of the alloy decreased with the addition of the Cr and Mo alloying elements. Cr acts a better role in grain refinement, while Mo enhances the content of γ phase in the alloys. The addition of Cr/Mo elements improves the elastic modulus of the material, but reduces the breaking strength due to the absence of the dislocation region found in non-Cr / Mo alloys that resist cracking. The concentrated distribution of γ phase at grain boundaries hinders recrystallization and the tendency of grain orientation.

Study on Quality and Property of Fine-Denier Raw Silk

2013 ◽  
Vol 796 ◽  
pp. 152-155
Author(s):  
Wen Jing Yu ◽  
Jian Zhong Tan ◽  
Guo He Wang
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Cross Section ◽  
Linear Density ◽  
Moisture Absorption ◽  
Breaking Strength ◽  
Development Prospect ◽  
Moisture Regain ◽  
Single Grain ◽  
Better Than

In this paper, fine-denier silkworm was fostered from the Qing Song silkworm, and their raw silk was made to 23.3dtex fine-denier raw silk and normal ones respectively, and their moisture absorption and quality such as cross section, fineness and mechanical properties were studied. The results showed that the cross section of fine-denier raw silk nearly irregular triangle; elongation and moisture regain were 39.63%, 13.32%; compared with normal raw silk, denier deviation, single grain silk linear density of fine-denier raw silk was 0.74dtex, 1.52dtex, respectively decrease to 46.54%, 48.41%, but breaking strength, elastic modulus, sericin content of fine-denier raw silk was 3.79cN/dtex , 0.69cN/dtex and 23.23%,respectively increased by 22.26% , 15% and 2.97%. Thus it can be seen, the quality and moisture absorption of fine-denier raw silk is better than normal ones, and it has a good development prospect and application value.

Effect Of Elevated Temperatures On Complete Concrete Deformation Diagrams

2019 ◽  
pp. 9-14
Keyword(s):  
Experimental Data ◽  
Elastic Modulus ◽  
Elevated Temperatures ◽  
Peak Load ◽  
Relative Deformation ◽  
Deformation Characteristics ◽  
Compression Tests ◽  
Strain Behavior ◽  
Different Temperatures ◽  
Deformation Diagrams

The analysis of the previous results of the study on concrete stress-strain behavior at elevated temperatures has been carried out. Based on the analysis, the main reasons for strength retrogression and elastic modulus reduction of concrete have been identified. Despite a significant amount of research in this area, there is a large spread in experimental data received, both as a result of compression and tension. In addition, the deformation characteristics of concrete are insufficiently studied: the coefficient of transverse deformation, the limiting relative compression deformation corresponding to the peak load and the almost complete absence of studies of complete deformation diagrams at elevated temperatures. The two testing chambers provided creating the necessary temperature conditions for conducting studies under bending compression and tension have been developed. On the basis of the obtained experimental data of physical and mechanical characteristics of concrete at different temperatures under conditions of axial compression and tensile bending, conclusions about the nature of changes in strength and deformation characteristics have been drawn. Compression tests conducted following the method of concrete deformation complete curves provided obtaining diagrams not only at normal temperature, but also at elevated temperature. Based on the experimental results, dependences of changes in prism strength and elastic modulus as well as an equation for determining the relative deformation and stresses at elevated temperatures at all stages of concrete deterioration have been suggested.

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