
【国外标准】 Standard Test Method for Strength Properties of Adhesive Bonds in Shear by Compression Loading
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:
4.1 It cannot be assumed that this test method measures the true shear strength of the adhesive bond. Many factors interfere or bias the measurement including the strength of the wood, the specimen, the shear tool designs themselves, and the rate of loading.4.1.1 Wood failure is very common in joints made with strong adhesives. Although high wood failure is normally desired, when it occurs the measured strength is lower than the true adhesive bond strength.4.1.2 Stress concentrations at the notches of the specimen tend to lower the measured strength. In a similar test for the shear strength of solid wood, Test Methods D143, these effects are self correcting so that the measured strength is close to the true shear strength of the wood. By analogy the same may be true in this test method, however, other factors are also involved and may alter the relationship.4.1.3 The rate of loading affects the strength of an adhesive bond according to the adhesive’s rheological properties. The more viscoelastic or plastic the adhesive, the greater effect. Thermosetting adhesives like urea- and phenol-formaldehyde are elastic. Their bond strengths can be measured over a range of loading rate from 0.038 to 1.27 cm/min (0.015 to 0.5 in./min) with no apparent affect. Thermoplastic adhesives like polyvinyl acetate, hot melts, and elastomer-based adhesives exhibit a broad range of elastic, viscoelastic, and plastic behaviors. Their bond strengths will be affected to varying degrees by changing the loading rate. Generally, increasing the rate, increases the measured strength.4.2 This test method is suitable for product research and development, qualifying adhesives in accordance with certain product or performance specifications, and monitoring bonding process control. This test method may be suitable for comparing and selecting adhesives, however, such comparisons must be made with caution since the measured strength of some adhesives may be different in different types of joints. Strength values obtained by this test method are not suitable as design shear strengths values without adjustment by certain engineering design factors.1.1 This test method covers the determination of the comparative shear strengths of adhesive bonds used for bonding wood and other similar materials, when tested on a standard specimen under specified conditions of preparation, conditioning, and loading in compression. This test method is intended primarily as an evaluation of adhesives for wood.1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.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.
标准号:
ASTM D905-08(2021)
标准名称:
Standard Test Method for Strength Properties of Adhesive Bonds in Shear by Compression Loading
英文名称:
Standard Test Method for Strength Properties of Adhesive Bonds in Shear by Compression Loading标准状态:
Active-
发布日期:
-
实施日期:
出版语种:
- 推荐标准
- ANSI X9.100-110-2021 Document Imaging Compatibility
- ANSI X9.100-120-2015 (R2021) Bank Deposit Tickets
- ANSI X9.100-181-2014 (R2021) TIFF Image Format for Image Exchange
- ANSI X9.100-20-2021 Magnetic Ink Character Recognition - Printing MICR Characters
- ANSI X9.121-2016 (R2021) Balance and Transaction Reporting Standard BTRS Version 3.1 (BTR3)
- ANSI X9.141-1-2021 Financial and Personal Data Protection and Breach Notification Standard - Part 1: Data Protection
- ANSI X9.145-2021 Financial Instrument Global Identifier - FIGI
- ANSI X9.24-2-2021 Retail Financial Services Symmetric Key Management - Part 2: Using Asymmetric Techniques for the Distribution of Symmetric Keys
- AS 2021-1994 Acoustics - Aircraft noise intrusion - Building siting and construction
- AS 2021-1994/Amdt 1-1995 Acoustics - Aircraft noise intrusion - Building siting and construction
- ASTM D7208-23 Standard Test Method for Determination of Temporary Ditch Check Performance in Protecting Earthen Channels from Stormwater-Induced Erosion
- ASTM D7210-21 Standard Practice for Extraction of Additives in Polyolefin Plastics
- ASTM D7212-13(2018) Standard Test Method for Low Sulfur in Automotive Fuels by Energy-Dispersive X-ray Fluorescence Spectrometry Using a Low-Background Proportional Counter
- ASTM D7215-22 Standard Test Method for Calculated Flash Point from Simulated Distillation Analysis of Distillate Fuels
- ASTM D7216-23 Standard Test Method for Determining Automotive Engine Oil Compatibility with Typical Seal Elastomers