1、NASM 1312-4-1997 紧固件试验方法4 搭接剪切_ STD.AIA/NAS NASML312-4-ENGL L797 0318743 0505394 35b NASM13 12-4 29 August 1997 ADOPTION NOTICE NASM13 12-4, “Fastener Test Methods Method 4 Lap Joint Shear” was adopted on 29 August 1997 for use by the Department of Defense OD). Proposed changes by DoD activities mus
2、t be submitted to the DoD Adopting Activity: Commander, Naval Air Warfare Center Aircraft Division, Code 4141OOB120-3 Highway 547, Lakehurst, NJ 08733-5100. DoD activities may obtain copies of this standard fiom the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia,
3、PA 191 11-5094. The private sector and other Government agencies may purchase copies fkom the Aerospace Industries Association, 1250 Eye Street W, Washington, DC 20005. NASM13 12-4 Should be used instead of MIL-STD-13 12-4, which was cancelled on 29 August 1997. Custodians: Navy - AS AirForce- 11 Ar
4、my - AV Preparing activity: Navy - AS (Project No. 53GP-0285-04) Review Activities: Navy - AS, SH AirForce- 11 Army - AV, AR DLA - IS COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesNATIONAL AEROSPACE STANDARD COPYRIGHT 1997 AEROSPACE IND
5、USTRIES ASSOCIATION OF AMERICA WC ALL RIGHTS RESERVED I I NASMl3 12-4 STANDARD PRACTICE FASTENER TEST METHODS METHOD 4 LAP JOINT SHEAR THE INITIAL RELEASE OF THIS DOCUMENT SUPERSEDES MIL-STD-13 12-4 DESIGNATION FOR THIS TEST METHOD REMAINS MIL-STD-13 12-4 Il SrnCIb I LIST OF CURREN I NO. 1 2 3 4 5 6
6、 I 8 9 REV. NEW NEW NEW NEW NEW NEW NEW NEW NEW NO. 11 19 1) 1A IC FSC 53GP SHEET 1 OF 15 APPROVAL DATE AUGUST 1997 USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY AEROSPACE STANDARD IS ENTIRELY VOLUNTARY AIA DOES NOT QUALIFY SUPPLIERS OR CERTIFY CONFORMANCE OF ITEMS PRODUCED UNDER AEROSPACE STANDARDS.
7、 AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1) THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICATION OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TRADEMARK RIGHTS. COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesS
8、TD.AIA/NAS NASM3332-4-ENGL 3777 m 0338743 0504788 b50 m NATIONAL AEROSPACE STANDARD (DCOPYRIGHT 1997 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC ALL RIGHTS RESERVED I I I NASM 13 12-4 FOREWORD This standard sets forth a standard test method to simulate shearing action on a fastener to determine
9、 its shear withstanding capabilities. ! SHEET 2 APPROVAL DATE AUGUST 1997 USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY AEROSPACE STANDARD IS ENTIRELY VOLUNTARY AIA DOES NOT QUALIFY SUPPLIERS OR CERTIFY CONFORMANCE OF ITEMS PRODUCED UNDER AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CLAIM RESP
10、ECTINO (1) THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICATION OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TRADEMARK RIGHTS. COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesParagraph 1 . 1.1 2 . 2.1 2.1.1 2.2 3 . 3.1
11、 3.2 4 . 4.1 4.1.1 4.1.2 4.1.3 4.2 4.2.1 4.2.1.1 4.2.1.2 4.2.1.3 4.2.1.4 4.2.2 4.2.2.1 4.2.2.1.1 4.2.2.2 4.2.2.3 4.2.3 4.2.3.1 4.2.3.2 4.2.3.3 5 . 5.1 5.1.1 5.2 5.3 6 6.1 6.2 NATIONAL AEROSPACE STANDARD COPYRIGHT 1997 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC ALL RIGHTS RESERVED I NASMl3 12-4
12、 I TABLE OF CONTENTS SCOPE . 5 Applicability . 5 REFERENCED DOCUMENTS . 5 Government documents . 5 Specifications, standards and handbooks . 5 Other publications . 5 DEFINITIONS . 6 Joint ultimate shear strength . 6 Joint yield shear strength . 6 GENERAL REQUIREMENTS . 6 Test apparatus . 6 Testing m
13、achine . 6 Test fixtures . 6 Test specimens . 6 Configuration . 6 Preferred specimen configuration . 8 Alternate specimen configuration . 8 Edge distance . 8 Preparation . 8 Parent material . 8 Joint material mechanical properties . 8 Fastener holes . 11 Specimen cleaning . 11 Assembly . 11 Grip len
14、gth . 11 Deflection measuring device . 6 Method for loading . 8 Fastener installation . 11 Nonvle-filling fastener joint preload . 12 DETAIL REQUIREMENTS . 12 Test procedures . 12 Installation . 12 Load rate . 13 Gage length . 13 NOTES . 13 General . .i . 13 Test report . 13 SHEET 3 APPROVAL DATE AU
15、GUST 1997 USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY AEROSPACE STANDARD IS ENTIRELY VOLUNTARY AIA DOES NOT QUALIFY SUPPLIERS OR CERTIFY CONFORMANCE OF ITEMS PRODUCED UNDER AEROSPACE STANDARDS . AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1) THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICAT
16、ION OR (2) THE EXISTENCE OF OR APPLlCABILlTY THERETO OF PATENT OR TRADEMARK RIGHTS . COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesNATIONAL AEROSPACE STANDARD COPYRIGHT 1997 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC ALL RIGHTS RES
17、ERVED I NASMl3 12-4 I o FIGURES Figure Sheet 1. Secondary modulus method for determing yield load deflection curve . 7 2. Preferred test lap joint specimen configuration . 9 3. Optional test lap joint specimen configuration . 10 TABLES Table Sheet I. Hole limits for non-interference shank type faste
18、ners . 12 II. Gage length . 15 SHEET 4 APPROVAL DATE AUGUST 1997 USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY AEROSPACE STANDARD IS ENTIRELY VOLUNTARY AIA DOES NOT QUALIFY SUPPLIERS OR CERTIN CONFORMANCE OF ITEMS PRODUCED UNDER AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1)
19、 THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICATION OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATFNT OR TRADEMARK RIGHTS. COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesNATIONAL AEROSPACE STANDARD COPYRIGHT 1997 AEROSPACE
20、INDUSTRIES ASSOCIATION OF AMERICA, INC ALL RIGHTS RESERVED I l I NASM 13 1 2-4 1. SCOPE 1,l Apdicabilitv. This test method outlines a standard procedure for determining the room temperature strength properties of mechanically fastened sheet metal lap joints statically loaded to produce shear on the
21、fastener. The significant strength properties include the ultimate strength and the yield strength of the joint. 1.1.1 This test method applies to sheet metal lap joints fastened with rivets, bolts, screws, or comparable fastening devices. 2. REFERENCED DOCUMENTS 2.1 Government documents. 2.1.1 SPec
22、ifications. standards and handbooks. Unless otherwise specified, the following specifications, standards and handbooks of the issue listed in the current Department of Defense Index of Specifications and Standards (DoDISS) and the supplement thereto (if applicable), form a part of this standard to t
23、he extent specified herein. STANDARDS MILITARY MIL-STD-45662 Calibration System Requirements HANDBOOKS MILITARY MIL-HDBK-5 Metallic Materials and Elements for Aerospace Vehicle Structures (Copies of specifications, standards, handbooks, drawings and publications required by contractors in connection
24、 with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications. The following document(s) forms a part of this specification to the extent specified herein, The issues of the documents which are indicated as DO
25、D adopted shall be the issue in the current DoDISS and the supplement thereto, if applicable. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM E 4 Load Verification of Testing Machines ASTM E 8 Tension Testing of Metallic Materials ASTM E 83 Verification and Classification of Extensometers SHE
26、ET 5 APPROVAL DATE AUGUST 1997 USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY AEROSPACE STANDARD IS ENTIRELY VOLUNTARY AIA DOES NOT QUALIFY SUPPLIERS OR CERTlFY CONFORMANCE OF ITEMS PRODUCED UNDER AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CLAIM RESPECTMG (1) THE SUITABILITY OF ITEMS FOR ANY
27、PARTICULAR APPLICATION OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TRADEMARK RIGHTS. COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesNATIONAL AEROSPACE STANDARD COPYRIGHT 1997 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA,
28、 INC ALL RIGHTS RESERVED NASM13 12-4 I I (Applications for copies should be addressed to the American Society for Testing and Materials, 19 16 Race Street, Philadelphia, PA 19 103 .) AEROSPACE INDUSTRIES ASSOCIATION, WC. (AIA) NAS 618 Fastener, Recommended Shank, Hole and Head to Shank Fillet Radius
29、, Limits for (Application for copies should be addressed to the Aerospace Industries Association, of America Inc., 1250 Eye Street, W, Washington, DC 20005-3924.) 3. DEFINITIONS 3.1 Joint ultimate shear strencJth. The ultimate strength of a joint is the highest load developed by the joint coincident
30、 with or prior to the failure of the fastener, parent sheet material, or a combination of both. 3.2 Joint yield shear strength. Yield strength of a joint is the load corresponding to a specified value of permanent set across the joint. Unless otherwise specified, the yield shall be determined from t
31、he load deflection curve by the Secondary Modulus Method as illustrated in figure 1 using an offset of 0.04D or as defined in MIL-HDBK-5, Section 9. 4. GENERAL REQUIREMENTS 4.1 Test apparatus. 4.1.1 Testing machine. The testing machine shall be capable of applying a tensile load at a controllable ra
32、te. The calibration system for the machine shall conform to MIL-STD-45662. Its accuracy shall be verified every 12 months by a method complying with ASTM E 4. The yield loads, ultimate loads and structural failure loads of the fasteners tested shall be within the loading range of the testing machine
33、 as defined in ASTM E 4. 4.1.2 Deflection measuring device. The measuring device used shall be an averaging, differential-transformer extensometer or equivalent, preferably of the separable type. It shall be used in conjunction yith an autographic recorder and it shall have an accuracy of 0.5 percen
34、t of the indicated joint deflection at yield strength and be calibrated per ASTM E,S3. It shall be capable of direct attachment or mounting to the joint specimen. Load and deflection ranges shall be used that give the initial part of the load-extension curve a slope between 45 and 60 degrees. 4.1.3
35、Test fixtures. The test fixtures holding the joint specimen shall have self-aligning jaws (pin or grip type) capable of transmitting a load along a faying surface of the specimen within 0.005- inch of the centerline of the fasteners. 4.2 Test specimens. 4.2.1 Configuration. SHEET 6 APPROVAL DATE AUG
36、UST 1997 USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY AEROSPACE STANDARD IS ENTIRELY VOLUNTARY AIA DOES NOT QUALIFY SUPPLIERS OR CERTIFY CONFORMANCE OF ITEMS PRODUCED UNDER AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1) THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICATIO
37、N OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TRADEMARK RIGHTS. COPYRIGHT Aerospace Industries Association of America, Inc. (AIA NAS)Licensed by Information Handling ServicesNATIONAL AEROSPACE STANDARD OCOPYRlGHT 1997 AEROSPACE INDUSTRIES ASSOClATlON OF AMERICA INC ALL RIGHTS RESERVED NASM1312-4 -PROJECTED SLOPE LINE (PARALLEL TO LINE D-E) YOTAL JOINT DEFLECTION - (INCHES) Typical load deflection curve for lap ioint specimen. Curve shall be developed by loading specimen starting at,point A, t
