ISO/TR 13086-3:2018

Name: ISO/TR 13086-3:2018 — Gas cylinders — Guidance for design of composite cylinders — Part 3: Calculation of stress ratios
SKU: ISO/TR 13086-3:2018
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Gas cylinders — Guidance for design of composite cylinders — Part 3: Calculation of stress ratios

Название (английский):

ISO/TR 13086-3:2018

Gas cylinders — Guidance for design of composite cylinders — Part 3: Calculation of stress ratios

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 23
Дата публикации:: 11 сентября 2018 г.
Издание:: ISO TR 13086 edition 1 version 1
ICS:: 23.020.35

Тип поставки:

Full version41 400 ₽Read online 24h1 200 ₽Read online 72h1 800 ₽

Язык документа:

ruen

Срок поставки:4 раб. дн. (перевод)

Цена:41 400 ₽

Описание (английский):

This document addresses the topic of calculation of stress ratios when analyzing filament wound composite cylinders. This document is applicable to cylinders of Types 2, 3, and 4. The calculation of stress ratios supports the development and revision of standards for fibre reinforced composite pressurized cylinders.

Abstract

Похожие стандарты

Другие стандарты ISO

Overview

ISO/TR 13086-3:2018 provides guidance for calculating stress ratios when analyzing filament-wound composite gas cylinders. Applicable to cylinder Types 2, 3 and 4, the technical report supports design, verification and the development or revision of standards for fibre-reinforced composite pressurized cylinders. The document explains how to determine the ratio of reinforcing-fibre stress at burst conditions relative to stress at working pressure - a key metric for assessing stress rupture (static fatigue) risk.

Key technical topics and requirements

Definition of stress ratio: the maximum fibre stress at burst divided by the maximum fibre stress at working (rated) pressure. Stress ratio is used in stress-rupture predictions similar to how stress range is used in cyclic fatigue analysis.

Burst ratio vs stress ratio: For Type 4 cylinders with a single structural fibre, burst ratio (burst pressure / working pressure) equals stress ratio. For Type 2 and 3 cylinders, autofrettage and liner interaction can make burst ratio conservative or non-representative.

Hybrid (multi‑fibre) Type 4 evaluation: Hybrids (e.g., carbon + glass) require per-fibre stress checks. The report describes using a reinforcement stiffness/load‑share factor based on fibre cross-sectional area and elastic moduli to adjust required burst demonstration. Example: if the primary fibre carries 90% of the structural load, a minimum demonstrated burst ratio of 2.475 was used in the guidance.

Analysis methods: Numerical methods (e.g., finite element analysis) are encouraged for Type 2/3 designs to capture liner–composite interaction and nonlinear liner behaviour. Models must be validated against measurements.

Measurement and validation: Stress ratios may be confirmed by strain or deflection measurements. Validity of analysis or measurements must be demonstrated, and burst-location (cylinder vs dome) should be verified.

Required data for accurate analysis: composite elastic moduli and strength, layer thicknesses, liner stress–strain behaviour and thickness, inner diameter, autofrettage/test/working/minimum burst pressures, and significant pre-stresses from winding.

Practical applications and users

Who benefits from ISO/TR 13086-3:2018:

Composite pressure-vessel designers and mechanical engineers

Manufacturers of filament-wound gas cylinders (Types 2–4)

Test laboratories and failure‑analysis teams performing burst and strain testing

Standards developers and regulatory bodies assessing safety criteria

Structural analysts performing FEA of liner–composite interaction

Practical uses:

Establishing stress-rupture margins and safe working parameters

Validating design via analysis and measurement before production

Evaluating hybrid winding strategies and material selection

Supporting standard development and certification evidence

ISO/TR 13086-3:2018

Abstract

Похожие стандарты

Overview

Key technical topics and requirements

Practical applications and users

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