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ASTM D7078/D7078M-20
Standard Test Method for Shear Properties of Composite Materials by V-Notched Rail Shear Method- 발행일 : 2020-04-01
- 발행기관 : ASTM
상세정보
| 분야 | 15.03 : 공간시물레이션; 항공우주재료; 고율섬유와 합성물 |
|---|---|
| 적용범위 | 1.1 This test method covers the determination of the shear properties of high-modulus fiber-reinforced composite materials by clamping the ends of a V-notched specimen between two pairs of loading rails. When loaded in tension, the rails introduce shear forces into the specimen through the specimen faces. In comparison, the specimen of Test Method D5379/D5379M is loaded through its top and bottom edges. Face loading allows higher shear forces to be applied to the specimen, if required. Additionally, the present test method utilizes a specimen with a larger gage section than the V-notched specimen of Test Method D5379/D5379M. In both test methods, the use of a V-notched specimen increases the gage section shear stresses in relation to the shear stresses in the vicinity of the grips, thus localizing the failure within the gage section while causing the shear stress distribution to be more uniform than in a specimen without notches. In comparison, Test Method D4255/D4255M utilizes an unnotched specimen clamped between two pairs of loading rails that are loaded in tension. Also, in contrast to Test Method D4255/D4255M, the present test method provides specimen gripping without the need for holes in the specimen. The composite materials are limited to continuous-fiber or discontinuous-fiber-reinforced composites in the following material forms: 1.1.1 Laminates composed only of unidirectional fibrous laminae, with the fiber direction oriented either parallel or perpendicular to the fixture rails. 1.1.2 Laminates of balanced and symmetric construction, with the 0° direction oriented either parallel or perpendicular to the fixture rails. 1.1.3 Laminates composed of woven, braided, or knitted fabric filamentary laminae. 1.1.4 Short-fiber-reinforced composites with a majority of the fibers being randomly distributed. 1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.2.1 Within the text, the inch-pound units are shown in brackets. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
| 국제분류(ICS)코드 |
83.120 : 강화 플라스틱
83.140.20 : 적층 시트 |
| 페이지수 | 15 |
| Edition | 20 |
이력정보
| No. | 표준번호 | 표준명 | 발행일 | 상태 |
|---|---|---|---|---|
| 1 | ASTM D7078/D7078M-20상세보기 | Standard Test Method for Shear Properties of Composite Materials by V-Notched Rail Shear Method | 2020-04-01 | 표준 |
| 2 | ASTM D7078/D7078M-20 REDLINE상세보기 | Standard Test Method for Shear Properties of Composite Materials by V-Notched Rail Shear Method | 2020-04-01 | 표준 |
| 3 | ASTM D7078/D7078M-19상세보기 | Standard Test Method for Shear Properties of Composite Materials by V-Notched Rail Shear Method | 2019-08-15 | 구판 |
| 4 | ASTM D7078/D7078M-19 REDLINE상세보기 | Standard Test Method for Shear Properties of Composite Materials by V-Notched Rail Shear Method | 2019-08-15 | 구판 |
| 5 | ASTM D7078/D7078M-12 REDLINE상세보기 | Standard Test Method for Shear Properties of Composite Materials by V-Notched Rail Shear Method | 2012-07-15 | 구판 |
| 6 | ASTM D7078/D7078M-12상세보기 | Standard Test Method for Shear Properties of Composite Materials by V-Notched Rail Shear Method | 2012-07-15 | 구판 |
| 7 | ASTM D7078/D7078M-05상세보기 | Standard Test Method for Shear Properties of Composite Materials by V-Notched Rail Shear Method | 2005-05-15 | 구판 |
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