BS-5350-C14-1979.pdf
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1、BRITISH STANDARD BS 5350-C14: 1979 Methods of test for Adhesives Part C14: 90 peel test for a rigid-to-rigid assembly UDC 665.93:620.179.4 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:58:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5350-C14:1979 This British Standard, having been pr
2、epared under the direction of the Adhesives Standards Committee, was published under the authority of the Executive Board and comes into effect on 31 August 1979 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference ADC/9 Draft for comment 78/52220 DC ISBN
3、 0 580 10879 1 Foreword This Part of this British Standard has been prepared under the direction of the Adhesives Standards Committee. Peel testing of adhesive bonds is widely used for assessing the performance of adhesives and, because of the wide diversity of the flexibility of substrates which ma
4、y be used, no single peel test will fulfil the requirements of all cases. This Part of this British Standard is intended to test an assembly consisting of two rigid adherends and is one of a series of peel tests. The other tests in this series are as follows: Part C9: Floating roller peel test; Part
5、 C10: Peel test for a flexible-to-rigid assembly; Part C11: 180 peel test for a flexible-to-rigid assembly; Part C12: 180 “T” peel test for a flexible-to-flexible assembly: Part C13: Climbing drum peel test. It should be understood that all tests in which one adherend is peeled from another involve
6、complex stress distribution. At the separation of the adherends, there is a stress concentration resulting in rupture of the adhesive in the bond line, but there are other elements of force required to bend and strain the outer adherend. The force recorded is a compound of all these elements of forc
7、e. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document compris
8、es a front cover, an inside front cover, pages i and ii, pages 1 to 4 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.D
9、ate of issueComments Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:58:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5350-C14:1979 BSI 07-1999i Contents Page ForewordInside front cover 1Scope1 2References1 3Definition1 4Principle1 5Apparatus1 6Test pieces1 7Conditioning and test atmosp
10、here2 8Procedure2 9Expression of results2 10Test report2 Figure 1 Test jig for 90 peel test for a rigid-to-rigid assembly3 Figure 2 Test piece for 90 peel test for a rigid-to-rigid assembly4 Figure 3 Forming rollers4 Figure 4 Typical peeling trace 4 Licensed Copy: sheffieldun sheffieldun, na, Mon De
11、c 04 15:58:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 15:58:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5350-C14:1979 BSI 07-19991 1 Scope This Part of this British Standard specifies a 90 peel test for the determination, under
12、specified conditions, of the peel resistance of a bonded assembly of adherends of similar modulus of rigidity. The test is suitable only for materials which are capable of being bent around a former of radius 75 mm without fracturing or cracking. 2 References This Part makes reference to the followi
13、ng standards publications. BS 903, Methods of testing vulcanized rubber Part A26: Determination of hardness. BS 5214, Testing machines for rubbers and plastics Part 1: Tensile, flexural and compression machines. BS 5350, Methods of test for adhesives Part A1: Adherend preparation Part E1: Guide to s
14、tatistical analysis. L152 (British Standard Aerospace Series), Aluminium-coated sheet and strip of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and artificially aged (Cu 4.4, Mg 0.5, Si 0.8, Mn 0.8). 3 Definition For the purposes of this Part of this British Standard the foll
15、owing definition applies. peel strength the force required to separate progressively the two members of a bonded test piece over the adherend surfaces, under the specified conditions of test. It is expressed in newtons 4 Principle Adherends are separated at a substantially steady rate from an open e
16、dge of a prepared bond line so that the separation occurs progressively along the bond line. For the 90 peel test for a rigid-to-rigid assembly, the force is applied approximately normal to the plane of the bond through the separated test piece which has been preformed into a segment of a circle. 5
17、Apparatus 5.1 Tensile testing machine. The tensile testing machine shall comply with the requirements of BS 5214-1 and it shall be of low inertia. 5.2 Test jig. A test jig is required to hold the test piece to the circumference of a sector of a cylinder, diameter 150 mm and width 25 mm (see Figure 1
18、 for suitable arrangement). 5.3 Rollers. Rollers shall be used for initial shaping of the test piece (see Figure 3). 6 Test pieces 6.1 Adherends. The adherends shall be two strips of flat material of dimensions 250 mm 25 0.5 mm and 200 mm 25 0.5 mm. Both adherends shall be the same width and each sh
19、all be of uniform thickness. NOTEThe material commonly used for this test is aluminium coated aluminium alloy 0.84 mm thick complying with the requirements of L152 (British Standard Aerospace Series). 6.2 Preparation of test pieces. Unless otherwise specified the faying surfaces of the adherends sha
20、ll be prepared in accordance with the requirements of Part A1 of this standard. Apply the adhesive over the whole width of the adherends to a length of 150 mm on each adherend as shown in Figure 2 by the method recommended by the manufacturer of the adhesive and bond the adherends using the methods
21、recommended by the manufacturer of the adhesive. NOTE 1A convenient method of obtaining a sharp adhesive boundary is to place a thin strip of material to which the adhesive does not adhere (abhesive strip) at the tag end of the panel. Alternatively, panels of suitable size shall be bonded and test p
22、ieces cut from the assembly, discarding 12 mm edges and taking care to avoid frictional heating and mechanical damage to the bond. If a press is used to make the test piece it shall be capable of applying an even pressure over the entire bonded area and it should preferably be fitted with a time-rel
23、ease mechanism. In order to give a uniform distribution of pressure over the bonded area the platens of the press shall be parallel. Where this is impracticable, one platen shall be covered with a resilient pad. NOTE 2A 10 mm thick pad of rubber of hardness approximately 45 IRHD (see BS 903-A26) has
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