Polymers have unique strain localization behavior such as crazing during tensile deformation. How to understand the mechanism at the molecular level of strain localization in polymeric materials has become an important topic in material science. In this work, tensile deformation process of polymers both...
The effect of strain rate on the stress–strain curve of oriented polymers. I. Presentation of experimental results The stress-strain curves of viscose, nylon 6.6, poly(ethylene terephthalate), polyacrylonitrile, and polypropylene have been determined at a large number of different strain rates betwee...
Starch is a low cost, renewable material which has received considerable interest as a filler in biodegradable polymers. It is available in a wide range of particle sizes, from approximately 1 micron (amaranth) to 30 microns (potato). The stress-strain behavior of starch-filled materials is dep...
The main objective of this work has been to develop some rational hypothesis for the toughness of rubber-modified glassy polymers as defined by the energy to rupture in a tensile measurement. It is shown that the rigid phase yields and that the toughness is a result of the large energy absor...
A comparison of the three models showed that a recalibrated model provides the most accurate prediction of the stress-strain behavior of FRP-confined UHPC in terms of the stress-strain curve and ultimate strength and strain. 展开 关键词: Concrete Confinement Fiber-reinforced polymers Stress-strain ...
The strain to stress ratio in such tests is termed the creep compliance. Neither the Voigt–Kelvin nor the Maxwell model, will fully represent the behaviour of polymers although the combination of the two, in series, as shown in Fig. 12.13, will give a reasonable approximation of polymer line...
The relationship between stress and strain can be plotted on a graph, making a stress–strain curve to form a stress–strain graph (Fig. 2.1.2h). Sign in to download full-size image Fig. 2.1.2h. Ratios of stress to strain on testing can form plots on a graph that demonstrate the ...
可能true stress–strain 曲线 (上部曲线) 的形式、 切线向他们来自点 e =-1 株轴和相应的名义 stress–strain 曲线上。曲线是示意图清晰显示施工 ;真正的聚合物,曲线的初始部分通常会大得多和最大值,当它发生时,通常是在更低的值的应变比所示。请参见示例 8.1 更现实版的 (c) 中的曲线。翻译...
On a stress–strain graph, the line of the slope of the curve represents the Young’s modulus of the material, with the shaded area in Fig. 2.2.4a representing the elastic energy stored in the material per unit volume of material. In this range, most of the energy used to load the ...
Graph of maximum stress theory. Quadrant I: biaxial tension; Quadrant II: tension; Quadrant III: biaxial compression; Quadrant IV: compression. It can be seen that uniaxial tension or compression lies on the two axes. Inside the box (outer boundaries) is the elastic range of the material. ...