Long-term Shear Strength Test

Typically, a vertical force per unit of test specimen area of 50 kN/m (50 kPa) is applied. The force exerted by the weight of the thrust rod, upper wedge and mounting parts is 28 N and by the weight of the level arm, test weight holder and displacement sensor 1 is 64 N. Since the advantage is 1 3, an additional force of (780 N - 28 N - 64 N)/3 = 229.3 N has to be exerted in this case as test weight in the experiments. Only the vertical displacement is usually monitored by sensor 1. After installation of the specimen holder in the test chamber the load is applied and the displacement 

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Adhesion of textnre particles (long-term shear strength test) ... 

Durability tests performance based long-term tests under accelerated test conditions pipe pressure tests (Gebler 1989) and long-term shear strength test (Seeger et al. 2000) discussed in Sects. 3.2.13 and 3.2.18 can serve as illustrations... 

Tests for laminate properties indicate that the moduli and stiffness of laminates made with each type of glass are identical. Tensile, flexural, and shear strengths are generally equal or slightly higher with E-CR. Long-term behaviour (tension -creep in air) is identical. 

Compared to BMI adhesives, the nadimide-terminated resins discussed in Section 4.3.4.2 exhibit a better thermal-oxidative resistance, but they require a complex cure schedule in autoclaves. Condensation and imidisation of the monomer reactants is performed at 205°C under partial vacuum to remove methyl alcohol and water. Addition polymerisation of the norbomene rings is then conducted under full vacuum at 290°C with an applied air pressure of 0.7 MPa. PMR adhesives have been successfully tested for bonding parts of cruise missiles, space shuttle, and YF-12 aircraft. The lap shear strength data indicate an excellent adhesion after a long-term ageing at 232°C and approximately 200 h at 316°C. 

CD (consohdation drained test) method used to determine the drained shear strength parameters to analyse long term stability of a soil mass. 

Long-term performance of bonded joints cannot be predicted from the properties of the adhesive and adherent surfaces. Complex interfacial and interface chemistry requires the testing of bonded structures. There are close to 50 bond-strength test methods accepted by ASTM International for development of data on adhesive joint properties. Typically tensile, lap-shear, and peel are the main adhesive bond configurations that are used for testing. 

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