Лако-красочные материалы — производство

1. Principles The three important techniques in this category that are discussed are XPS (also frequently called ESCA), AES, and SIMS. The basic principles of these techniques are discussed only superficially. Recent literature on these three techniques with examples of applications to materials science problems is abundant [3-14]. The surface analysis technique ion scatter­ing spectroscopy […]

Despite the enormous number of spectroscopic techniques that have been described and developed, only a limited number are commercially available and are actually used in the study and development of adhesive bonding materials. These techniques will be described in more detail in this section. The techniques highlighted here are XPS, AES, SIMS, various forms of […]

Table 1 lists a wide range of spectroscopic techniques with details on the type of informa­tion that these techniques can provide, their sampling depth, their sensitivity, and their major limitations. Some key references are provided for each technique. The techniques are classified in five major categories: ion spectroscopies, electron spectroscopies, x-ray spectroscopies, vibrational spectroscopies, and […]

W. J. van Ooij University of Cincinnati, Cincinnati, Ohio, U. S.A. I. INTRODUCTION This chapter reviews the many different spectroscopic techniques that can be used to study the composition and performance of adhesively bonded materials. Such a review was deemed necessary because many new analytical techniques have been developed lately and a large number of […]

In this study, a comprehensive program to evaluate the durability, shear strength, and fracture toughness of FRP-wood bonded interfaces was presented. The potential in-service delamination of bonded interfaces was evaluated by a 3-cycle test involving repeated wetting and drying [4]. Also, wet and dry interface strengths were evaluated through block-shear tests [4]. The fracture toughness […]

The fatigue behavior of the phenolic FRP-wood interface bond was investigated [7], using a TDCB specimen for constant strain energy release rate range AG. The load ratio effect on interface crack propagation rate at room temperature and laboratory conditions was obtained. A modified Paris Law equation was proposed to explain the load ratio effect. The […]

So far, only the load ratio effects on fatigue fracture of the FRP-wood interface have been investigated [7]. The log-log plot of the crack propagation rate da/dN versus the strain energy release rate range AG for load ratios R of 0.1, 0.3, and 0.5 is shown in Fig. 22. It is easily seen that there […]

A TDCB specimen designed by the Rayleigh-Ritz method [8] was used for fatigue tests on FRP-wood interfaces. The TDCB specimen was contoured to achieve a constant rate of compliance change with respect to crack length, dC/da. The details of the specimen design and applications for FRP-wood interface fracture studies [8] are given in previous sec­tions. […]

Fatigue failure of materials and bonded interfaces is a complex topic and yet a quite important issue in engineering practice, since most structures are subjected to both applied and environmental cyclic loadings during their service life. The fatigue failure process has not been completely understood and there is no single accepted criterion or law to […]

On the basis of the above design procedure, the geometries of linear-slope CDCB or TDCB specimens for dry and wet FRP-wood interfaces were designed for both phenolic (Fig. 13) and epoxy (Fig. 14) FRP-wood samples. The phenolic FRP-wood bonded inter­face (Fig. 13) consisted of E-glass/phenolic pultruded FRP, and an integral red maple adherend-contour combination; the […]