Climbing drum peel

Fig. 6. Top Morphology of FPL surface following fluorine contamination. This is to be compared to the standard FTL morphology of Fig. 14. Middle Climbing drum peel (CDP) strength as a function of F surface concentration. Bottom F concentration on FPL surfaces following doping the FPL etch solution and the rinse water with NaF. The dotted line corresponds to the surface concentration with which the CDP strength began to decrease. Adapted from Ref. [37].

Metal-to-metal climbing drum peel at 75°F 45 Ib-in/in (Grade 5)... 

Fig. 10. Climbing drum peel apparatus (honeycomb shown). Reproduced by permission of the Boeing Company.

A pressure of 25 psi and temperature of 175°C are required for 1 h to cure the epoxynylon adhesive. Because of their excellent filleting properties and high peel strength, epoxy-nylon adhesives are often used to bond aluminum skins to honeycomb core in aircraft structures. In these applications, climbing drum peel strengths in excess of 150 lb/in have been achieved. 

D 1781 Method for Climbing Drum Peel Test for Adhesives... 

ASTM D 1781-93 (1993) Standard Test Methodfor Climbing Drum peel for... 

The testing of the peel resistance occurs according to the standard DIN EN 1464 Adhesives - determination of peel resistance of high-strength bonded joints - climbing drum peel test (respectively, T-peel test) and serves the determination of the resistance of bonded metal joints to peeling forces (Figure 10.5). 

Figure 8 Some standard peel test geometries (a) T-peel test specimen, ASTM D-1876 (b) typical testing jig used in ASTM D-1876 (c) climbing drum peel test, ASTM D-1781 (d) 180° peel test, ASTM 903.

As part of this work, it is notable that PPQ provided Ti/Ti climbing drum peel strength at RT of 80 in-lb/3 in width and flatwise tensile strength (PI core and Ti face... 

Clarke (7), as early as 1971, studied the behavior of a nitrile rubber modified, epoxy paste adhesive using the climbing drum peel strength test. Peeling resistance was... 

ASTM D1781-98 Standard method for climbing drum peel test for adhesives. 

ASTM D 1781-76—Climbing drum peel test for adhesives ASTM D 1876-72—Peel resistance of adhesives (T-peel test)... 

A T-peel test is shown in Fig. 27.2. The specimen is usually 1 in. (2.54 cm) wide and is described in Standard Test Method ASTM D1876 [6]. This specimen is symmetrical (both adherends are the same thickness). Other peel test specimens are not symmetrical, such as the floating roller peel test [7] or the climbing drum peel test [8]. The test measures the fracture resistance of an adhesive under conditions in which the adherends may plastically deform. In the tables presented later, the peel strength is given in Newtons per centimeter of width (N/cm) and in tmits of pounds per inch width (piw). The latter is shown in parenthesis. In some cases, the peel strength is derived from climbing drum peel measurements in which the results are presented in torque, in. Ib/in. For pressure sensitive adhe-... 

Adherends yielded and elongated, bond did not fail, adherend yield strength is quoted. Climbing drum peel results are given in values of torque (in. Ib/in). 

Specific tests of adhesion are described in more detail under the following articles Blister test, Climbing drum peel test, Fracture mechanics. Napkin ring test. Peel tests. Rubber to metal bonding - testing. Shear tests. Tensile tests. Wedge test and in Refs. [1-5] see also Standards for adhesives and adhesion and Appendix. 

Climbing drum peel test K B ARMSTRONG Peeling of metal sheet, for example, skin from honeycomb... 

Peel or Stripping Strength of Adhesive Bonds, Test for (D 903) Climbing Drum Peel Test for Adhesives, Method for (D 1781) Peel Resistance of Adhesives (T-Peel Test), Test for (D 1876) Evaluating Peel Strength of Shoe Sole Attaching Adhesives,... 

An alternative to the climbing drum peel test is the floating roller peel test, described in ASTM D3167-76. Direct comparisons cannot be made between the two tests because the floating roller test induces a more severe peel angle than the climbing drum. 

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