
【国外标准】 Standard Practice for Flexural Residual Strength Testing of Damaged Sandwich Constructions
本网站 发布时间:
2024-02-28
开通会员免费在线看70000余条国内标准,赠送文本下载次数,单本最低仅合13.3元!还可享标准出版进度查询、定制跟踪推送、标准查新等超多特权!  
查看详情>>

适用范围:
5.1 This practice provides supplemental instructions that allow the use of Test Method D7249/D7249M to determine residual compressive or tensile strength properties of damaged sandwich constructions. Susceptibility to damage from concentrated out-of-plane forces is one of the major design concerns of many structures made using sandwich constructions. Knowledge of the residual strength properties of a sandwich panel is useful for product development, establishing design allowables, and material selection.5.2 The residual compressive or tensile strength data obtained using this test practice is most commonly used in material selection, research and development activities, and establishing design allowables.5.3 The properties obtained using this test practice can provide guidance in regard to the anticipated compressive or tensile residual strength capability of sandwich constructions of similar facesheet and core material, adhesive, facesheet and core thickness, facesheet stacking sequence, and so forth. However, it must be understood that the residual strength of sandwich constructions is highly dependent upon several factors including geometry, thickness, stiffness, support conditions, and so forth. Significant differences in the relationships between the damage state and the residual compressive or tensile strength can result due to differences in these parameters.5.4 The compression strength from this test may not be equivalent to the compression strength of sandwich structures subjected to pure edgewise (in-plane) compression.5.5 The reporting section requires items that tend to influence residual strength to be reported; these include the following: facesheet and core materials, core density, cell size and wall thickness if applicable, film adhesive, methods of material fabrication, accuracy of lay-up orientation, facesheet stacking sequence and thickness, core thickness, overall specimen thickness, specimen geometry, specimen preparation, specimen conditioning, environment of testing, type, size and location of damage (including method of non-destructive inspection), specimen/fixture alignment, time at temperature, and speed of testing.1.1 This practice provides instructions for modifying the long beam flexure test method to determine the tensile or compressive residual strength properties of sandwich constructions that have been subjected to quasi-static indentation or drop-weight impact per Practice D7766/D7766M. The tensile or compressive strength result is determined by which facesheet contains the damage, either the loaded-span or support-span facesheet, based on how the specimen is positioned in the fixture.1.2 This practice supplements Test Method D7249/D7249M with provisions for testing damaged sandwich specimens. Several important test specimen parameters (for example, facesheet thickness, core thickness and core density) are not mandated by this practice; however, repeatable results require that these parameters be specified and reported.1.3 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.1.3.1 Within the text, the inch-pound units are shown in brackets.1.4 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.1.5 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.
标准号:
ASTM D8388/D8388M-22
标准名称:
Standard Practice for Flexural Residual Strength Testing of Damaged Sandwich Constructions
英文名称:
Standard Practice for Flexural Residual Strength Testing of Damaged Sandwich Constructions标准状态:
Active-
发布日期:
-
实施日期:
出版语种:
- 推荐标准
- ASTM E2102-21 Standard Test Method for Measurement of Mass Loss and Ignitability for Screening Purposes Using a Conical Radiant Heater
- ASTM E2103/E2103M-19 Standard Classification for Bridge Elements—UNIFORMAT II
- ASTM E2104-22 Standard Practice for Radiographic Examination of Advanced Aero and Turbine Materials and Components
- ASTM E2106-00(2019) Standard Practice for General Techniques of Liquid Chromatography-Infrared (LC/IR) and Size Exclusion Chromatography-Infrared (SEC/IR) Analyses
- ASTM E2107-20 Standard Practice for Environmental Regulatory Compliance Audits
- ASTM E2108-16 Standard Practice for Calibration of the Electron Binding-Energy Scale of an X-Ray Photoelectron Spectrometer
- ASTM E2109-01(2021) Standard Test Methods for Determining Area Percentage Porosity in Thermal Sprayed Coatings
- ASTM E211-82(2022) Standard Specification for Cover Glasses and Glass Slides for Use in Microscopy
- ASTM E2110-17 Standard Terminology for Exterior Insulation and Finish Systems (EIFS)
- ASTM E2112-23 Standard Practice for Installation of Exterior Windows, Doors and Skylights
- ASTM E2113-23 Standard Test Method for Length Change Calibration of Thermomechanical Analyzers
- ASTM E2114-23 Standard Terminology for Sustainability
- ASTM E2115-22 Standard Guide for Conducting Lead Hazard Assessments of Dwellings and of Other Child-Occupied Facilities
- ASTM E2121-21 Standard Practice for Installing Radon Mitigation Systems in Existing Low-Rise Residential Buildings
- ASTM E2122-22 Standard Guide for Conducting In-situ Field Bioassays With Caged Bivalves