ASTM D4476-09 rus PDF

Full title and description

ASTM D4476-09 — Standard Test Method for Flexural Properties of Fiber-Reinforced Pultruded Plastic Rods. This test method specifies the procedure, specimen geometry, and reporting requirements for determining the flexural properties of pultruded plastic rods (semicircular cross section) and is available in English; Russian-language translations / localized PDF versions are offered by third‑party distributors.

Abstract

This standard describes a three-point flexure procedure and specimen configuration for measuring flexural modulus and strength of fiber‑reinforced pultruded plastic rods (semicircular cross section). It is intended primarily for quality control and specification testing and presents requirements for specimen preparation, test equipment, test speed, and reporting of results in either SI or inch‑pound units (units treated independently).

General information

• Status: Historical — superseded by a later revision and the D4476 series was withdrawn from active use by ASTM (see FAQ).
• Publication date: Approved September 1, 2009 (published/entered into the Book of Standards 2009).
• Publisher: ASTM International (formerly American Society for Testing and Materials).
• ICS / categories: 83.120 — Reinforced plastics; Committee D20 (Plastics), Subcommittee D20.18 (Reinforced Thermosetting Plastics).
• Edition / version: D4476-09 (2009 edition).
• Number of pages: 5 pages (concise test method with figures and apparatus requirements).

Scope

This test method covers determination of flexural properties of fiber‑reinforced pultruded plastic rods using specimens with a semicircular cross section. The method is designed for rods with diameters of 1/2 in. (0.5 in.) or greater and gives requirements for specimen selection, test fixture geometry, loading, deflection measurement, and result calculation. Both SI and inch‑pound units are supported but treated independently. The method does not address all possible safety concerns — users must apply appropriate safety and handling practices.

Key topics and requirements

• Specimen geometry: semicircular cross section (rod or cut from pultruded lengths), designed for diameters ≥ 1/2 in.
• Test arrangement: three‑point bending on a specified arbor/fixture to produce correct fiber stress distribution and avoid premature shear/compression failure.
• Machine and measurement accuracy: calibrated testing machine, controlled crosshead rate, and deflection measurement with stated accuracy limits.
• Reporting: flexural strength, flexural modulus, conditioning details, units used (SI or inch‑pound), and any deviations from the prescribed procedure.
• Applicability: intended mainly for quality control, material specification, and comparative testing of pultruded rods.

Typical use and users

Typical users include composite material manufacturers, pultrusion producers, independent materials testing laboratories, R&D engineers evaluating pultruded rod properties, and quality assurance personnel specifying or verifying flexural performance of pultruded plastic rods for structural or industrial applications. The method is commonly applied where rod bending performance and comparative batch control are required.

Related standards

This test method superseded earlier D4476 editions (for example D4476-03) and was itself revised by the combined designation D4476/D4476M-14. Other ASTM practices and specifications dealing with pultruded composites and test methods for pultruded shapes may be referenced in material specifications; practice D7745 (and other D20 committee documents) are examples of related guidance.

Keywords

pultrusion, pultruded rods, flexural properties, three-point bend, fiber-reinforced plastics, semicircular cross section, flexural strength, flexural modulus, ASTM D4476.

FAQ

Q: What is this standard?

A: ASTM D4476-09 is a Standard Test Method that defines how to measure flexural properties of fiber‑reinforced pultruded plastic rods using semicircular specimens and a three‑point bending arrangement.

Q: What does it cover?

A: It covers specimen geometry (semicircular rods, ≥ 1/2 in. diameter), test fixtures and apparatus, required measurement accuracy, test speeds, calculation of flexural strength and modulus, unit systems (SI and inch‑pound), and reporting conventions.

Q: Who typically uses it?

A: Composite manufacturers, pultrusion shops, materials test labs, product designers and QA/QC engineers who need consistent, repeatable flexural data for pultruded plastic rods.

Q: Is it current or superseded?

A: D4476-09 was superseded by a later combined revision (D4476/D4476M-14). The D4476 series was subsequently withdrawn by ASTM in November 2022 (withdrawn without replacement due to limited industry use), so the 2009 edition is not the current active ASTM practice. Users should check current ASTM listings or committee D20 announcements for any replacement methods or recommended alternatives.

Q: Is it part of a series?

A: Yes. D4476 has earlier and later editions (e.g., D4476-97, D4476-03, D4476-09) and was updated into D4476/D4476M-14 before the series was withdrawn. The document was developed under ASTM Committee D20, Subcommittee D20.18.

Q: What are the key keywords?

A: Pultruded rods, flexural test, three‑point bending, semicircular specimen, flexural modulus, flexural strength, fiber‑reinforced plastics, ASTM D4476.