Ultimate breaking stress

The ultimate breaking stresses were compared in the process of compression of foam concretes modified with copper/carbon nanocomposites obtained in different nanoreactors of polyvinyl alcohol [21, 22]. The sizes of nanoreactors change depending on the crystallinity and correlation of acetate and hydroxyl groups in PVA which results in the change of sizes and activity of nanocomposites obtained in nanoreactors. It is observed that the sizes of nanoeomposites obtained in nanoreactors of PVA matrixes 16/1 (ros) (NC2), PVA 16/1 (imp) (NCI), PVA 98/10 (NC3), correlate as NC3 > NC2 > NCI. The smaller the nanoparticle size the greater its activity, and the less amount of NS is required for self-organization effect. 

In both interpretations of pullout curves shown in Fig. 9.4, the first linear. Fig. 9.4a, or nonlinear. Fig. 9.4b, part would be associated with debonding of the fiber with respect to the block. For long enough embedded L, the pullout stress would correspond to ultimate (breaking) stress of the fiber constant. 

When force is applied such that it tends to peel or tear apart the faces of an adhesive joint, the stresses involved very quickly reach critical levels. In such cases, the applied load is no longer distributed over the whole area of the bond but is concentrated along a narrow line at the edge of the joint (Fig. 19). The ultimate breaking stress of the materials is rapidly exceeded, resulting in tearing or total failure of the adhesive bond. 

The ultimate breaking stresses were compared in the process of compression of foam concretes modified with copper/carbon nanocomposites obtained in different nanoreactors of polyvinyl alcohol [13, 14]. The sizes of nanoreactors change depending on the crystallinity and correlation of acetate and hydroxyl groups in PVA, which results in the change of sizes... 

The ultimate (breaking) stresses can also be inserted into the empirical Williams—Landel—Ferry (WLF) equation introduced in Chapter 4, here using... 

A very important diagram for fibres and yams is the stress—strain diagram, where the specific stress is plotted as a function of the elongation (extensional strain) in %. The curve starts at an elongation of zero and ends in the breaking point at the ultimate specific stress (=tensile strength or tenacity) and the ultimate elongation (=strain at break). 

Ultimate tensile stress calculated from break strength... 

Counit type M (x10- ) Counit (moi%) Crystaiiinity (%) Oc (%) a (%) b (%) iVloduius (iVIPa) Yieid stress (iVIPa) Ultimate tensile stress Draw ratio at break... 

Chitosan absorbs a significant amount of water when placed in aqueous solution. Equilibrium water content of 48 percent was determined by immersing chitosan films in deionized water. Tensile testing on these wet films resulted in an ultimate tensile stress of aj roximately 1600 psi with 70 percent elongation at break. ... 

Young s moduli increasing from about 1.3 to 14GPa and the ultimate tensile stress from about 50 to 550 MPa (for tapes drawn 24 times X = 24). In contrast, the strain at break is reduced to 5%. 

Tensile strength is the maximum tensile stress which a material is capable of developing. It is the force per unit of the original cross-sectional area which is applied at the time of rupture of a specimen. It is known variously as breaking load , breaking stress and ultimate tensile strength . Tensile stress, and tensile strength... 

The ratio of the ultimate breaking strength of a member or piece of material or equipment to the actual working stress or safe load when in use. 

Although crosslinking of UHMWPE has been shown to improve performance in hip-simulator wear tests, mechanical tests condncted on crosslinked material have shown deterioration in several mechanical properties including Young s modnlns, yield stress, ultimate tensile stress, and strain to break. These resnlts appear contradictory, since it is generally believed that the toughness of a polymer correlates with its wear performance. A better understanding of the relationship between the mechanical properties and wear performance of UHMWPE is required for the development of new wear-resistant polymeric components for use in total joint replacement prostheses. 

The introduction of stress during the climatic exposure markedly influences strength retention. Figures 121-3 illustrate this and refer, in numerical order, to adhesives F, G and H of Table 29 at the hot, dry and hot, wet tropical exposure sites over 4 years. The stress applied was tensile and the level is expressed as a percentage of the proof ultimate tensUe breaking stress. It was continuously applied by dead load. 

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