Fatigue Resistance Characteristic

It is worth noting the difference in the fatigue resistance characteristics of 1 and 3.[131 Compound la has methyl groups at the 4- and 4 -positions of the thiophene rings, while compound 3a has no methyl groups at these positions. Figure 2 shows the cycle number dependence of absorbances of the bleached samples. 

Tomita N, Kitakura T, Ikada Y, Aoyama E. Fatigue resistance characteristics of polyethlylene containing vitamin E. J Jpn Orthop Assoc 1998 72(8). 

Some more recent examples of epoxy-urethane hybrids in one- and two-component structural adhesives are noted below. These have had success in the automotive industry where high impact strength, fatigue resistance, and high bond strength to a variety of substrates are valued characteristics. 

The CVI SiC/SiC composites are also promising for nuclear applications because of the radiation resistance of the p phase of SiC, their excellent high-temperature fracture, creep, corrosion and thermal shock resistances. Studies on the P phase properties suggest that CVI SiC/SiC composites have the potential for excellent radiation stability [5]. Furthermore, because of excellent thermal fatigue resistance, start-up and shut-down cycles and coolant loss scenarii should not induce significant stmctural damage [5]. The CVI SiC/SiC are also considered for applications as stmctural materials in fusion power reactors, because of their low neutron-induced activation characteristics coupled with excellent mechanical properties at high temperature [6-8]. 

Adhesives made from the various forms of NR exhibit similar characteristics, although some properties are altered by adding curatives. They exhibit high flexibility, high resilience and fatigue resistance combined with low to moderate cost. The non-polar nature of the base NR (Fig. 1) means that there is very good water and moisture resistance and electrical insulation. In these respects, solvent-borne adhesives have an advantage... 

A crystalline polymer in an amorphous state is usually stiffer, but also more resistant to gas permeability and solvent. These characteristics are not adequate for practical applications because a high crystalline state produces fragile materials with low flexibility and fatigue resistance. 

The characteristics of carbon fiber include mechanical properties (strength, modulus, extension), thermal properties (heat capacity, thermal conductivity, thermal expansion), chemical properties (oxidation, corrosion), electrical and magnetic properties. In a word, carbon fiber is an excellent enhanced material, which has high strength, high modulus, heat resistance, corrosion resistance, fatigue resistance, conductivity and diathermancy. The characteristics are mainly reflected in the following aspects (Li, 2005) ... 

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