ASTM D7774-22
Standard Test Method for Flexural Fatigue Properties of Plastics

Standard No.

ASTM D7774-22

Release Date

2022

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D7774-22

Scope

1.1 This test method covers the determination of dynamic fatigue properties of plastics in flexure. This method is applicable to rigid and semi-rigid plastics. Stress and strain levels are below the proportional limit of the material where the strains and stresses are relatively elastic. Three-point or fourpoint bending systems are used to determine these properties. 1.2 This test method can be used with two procedures: 1.2.1 Procedure A, designed for materials that use threepoint loading systems to determine flexural strength. Threepoint loading system is used for this procedure. 1.2.2 Procedure B, designed for materials that use fourpoint loading systems to determine flexural strength. Fourpoint loading system is used for this procedure. 1.3 Comparative tests can be run in accordance with either procedure, provided that the procedure is found satisfactory for the material being tested. 1.4 The values stated in SI units are to be regarded as the standard. The values provided in parentheses are for information only. 1.5 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. NOTE 1—This standard and ISO 13003 address the same subject matter, but differ in technical content and results cannot be directly compared between the two test methods. 1.6 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.

ASTM D7774-22 Referenced Document

• ASTM D1505 Standard Test Method for Density of Plastics by the Density-Gradient Technique
• ASTM D2839 Standard Test Method for Use of a Melt Index Strand for Determining Density of Polyethylene
• ASTM D3479/D3479M Standard Test Method for Tension-Tension Fatigue of Polymer Matrix Composite Materials
• ASTM D4883 Standard Test Method for Density of Polyethylene by the Ultrasound Technique
• ASTM D5947 Standard Test Methods for Physical Dimensions of Solid Plastics Specimens
• ASTM D618 Standard Practice for Conditioning Plastics for Testing
• ASTM D6272 Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials by Four-Point Bending
• ASTM D638 Standard Test Method for Tensile Properties of Plastics
• ASTM D790 Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials*， 2024-04-22 Update
• ASTM D792 Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
• ASTM D883 Standard Terminology Relating to Plastics*， 2024-02-01 Update
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E1942 Standard Guide for Evaluating Data Acquisition Systems Used in Cyclic Fatigue and Fracture Mechanics Testing
• ASTM E4 Standard Practices for Force Verification of Testing Machines
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• ASTM E83 Standard Practice for Verification and Classification of Extensometer
• ISO 13003 Fibre-reinforced plastics - Determination of fatigue properties under cyclic loading conditions

ASTM D7774-22 history

• 2022 ASTM D7774-22 Standard Test Method for Flexural Fatigue Properties of Plastics
• 2017 ASTM D7774-17 Standard Test Method for Flexural Fatigue Properties of Plastics
• 2012 ASTM D7774-12 Standard Test Method for Flexural Fatigue Properties of Plastics
• 2011 ASTM D7774-11 Standard Test Method for Flexural Fatigue Properties of Plastics