BS-A-305-1994 ISO-7961-1994.pdf
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1、BRITISH STANDARD BS A 305:1994 ISO 7961:1994 Bolts Test methods Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:32:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 305:1994 This British Standard, having been prepared under the direction of the Aerospace Sta
2、ndards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 August 1994 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference ACE/12 Draft for comment 91/82709 DC ISBN 0 580 23219 0 Committees responsible f
3、or this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/12, upon which the following bodies were represented: The Association of Electronics, Telecommunications and Business Equipment Industries Br
4、itish Industrial Fasteners Federation Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:32:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
5、A 305:1994 BSI 12-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Tests1 4Test validity10 5Test reports10 Annex A (normative) Calibration of apparatus11 Annex B (normative) Test reports11 Annex C (informative) Formulae12 Figure 1 Tensi
6、le test Test device2 Figure 2 Tensile test Position of the nut in relation to the complete threads (shank side)2 Figure 3 Tensile test Upper and lower cup details3 Figure 4 Double shear test Test device4 Figure 5 Double shear test Upper and lower blocks5 Figure 6 Stress corrosion test Test cylinder
7、(principle)10 Table 1 Rates of load application Tensile test4 Table 2 Rates of load application Double shear test6 Table B.1 Information to appear in test report11 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:32:48 GMT+0
8、0:00 2006, Uncontrolled Copy, (c) BSI BS A 305:1994 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee. It is identical with ISO 7961:1994 Aerospace Bolts Test methods, published by the International Organization f
9、or Standardization (ISO). Cross-reference. The Technical Committee has reviewed the provisions of ISO 7500-1:1986, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all
10、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 comprises a front cover, an inside front cover, pages i and i
11、i, pages 1 to 12, an inside back cover 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. Licensed Copy: London South Bank University, London South Bank University, S
12、at Dec 09 03:32:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 305:1994 BSI 12-19991 1 Scope This International Standard specifies test methods for bolts for aerospace constructions. It is applicable whenever quoted in reference. 2 Normative reference The following standard contains provisions w
13、hich, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility
14、 of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 7500-1:1986, Metallic materials Verification of static uniaxial testing machines Part 1: Tensile testing machines. 3 Tests 3.1 Tensile test
15、at ambient temperature 3.1.1 Apparatus 3.1.1.1 Test device (see Figure 1). The test device shall be centred such that the stress at four equi-spaced points around the test sample is uniform within 1 %, or such that the coaxiality between the bolt and the clearance holes is less than or equal to 0,02
16、5 mm to ensure the application of the tensile load along the axis of the bolt1). Other types of device may be used provided they respect the requirements of Figure 3. 3.1.1.1.1 Cups, fixed or removable, in conformity with Figure 3, which specifies only functional requirements. 3.1.1.1.2 Test nut (fr
17、ee-running or self-locking) or threaded part (assuming the role of a nut), of sufficient strength to guarantee bolt failure. 3.1.1.2 Tapered spacer, placed under the head during the test, when required by the procurement specification or definition document to evaluate the effect of angularity. The
18、minimum clearance between the hole and the bolt shank shall be 0,13 mm. At least 90 % of the bolt bearing area shall be supported by the spacer which shall have a diameter sufficient to support the width across the corners of the bolt. The tolerance on the hole diameter in the spacer shall bemm. 3.1
19、.1.3 Washers, used under bolt heads or nuts only in the case outlined in 3.1.1.2. 3.1.1.4 Tensile or compressive test machine, depending on the fixture, capable of applying the test loads. 3.1.2 Procedure 3.1.2.1 Assemble the bolt in the test device (3.1.1.1) as shown in Figure 1. Install the nut (3
20、.1.1.1.2) as shown in Figure 2. Place the complete assembly between the loading platens of the machine. 3.1.2.2 Apply the load specified in the procurement specification or definition document at the rate specified in Table 11), in a controlled way. 3.2 Double shear test 3.2.1 Apparatus See Figure 4
21、 and Figure 5, the latter only defining functional requirements. NOTE 1Totally enclosed top and bottom blades may be used as an alternative. 3.2.2 Procedure 3.2.2.1 Assemble the bolt into the lower part of the guillotine. The blend radius under the head and the threaded portion shall not be in conta
22、ct with the lower part of the guillotine (see Figure 4). 3.2.2.2 Apply the load required in the procurement specification or definition document at the rate specified in Table 2, in a controlled way. If this load is attained without breakage of the bolt, the test may be terminated1). 1) Calibration
23、requirements: see ISO 7500-1:1986 and Annex A of this International Standard. +0,08 0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:32:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 305:1994 2 BSI 12-1999 Figure 1 Tensile test Test device Figure 2 Tensi
24、le test Position of the nut in relation to the complete threads (shank side) Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:32:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS A 305:1994 BSI 12-19993 Figure 3 Tensile test Upper and lower cup details Licensed
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