ASME STP-PT-056-2013 PDF

Full title and description

Extend Stress-Strain Curve Parameters and Cyclic Stress-Strain Curves to All Materials Listed for Section VIII, Divisions 1 and 2 Construction — a technical report (STP-PT-056:2013) that evaluates methods to parameterize monotonic and cyclic stress–strain curves for materials used in ASME Section VIII pressure-vessel construction and recommends approaches for possible incorporation into the ASME code.

Abstract

This report reviews literature and experimental data to assess existing methods for representing stress–strain behavior, identifies limitations (including determination of ultimate tensile strain), examines tangent-modulus approaches, and proposes parameterization and cyclic stress–strain curve models aimed at expanding reliable material curves for materials listed in ASME Section VIII, Divisions 1 and 2. It includes evaluation results, methodological proposals, and implementation recommendations for future code use.

General information

• Status: Active / Current (stabilized maintenance product; available as an ASME STP report).
• Publication date: April 5, 2013.
• Publisher: American Society of Mechanical Engineers (ASME).
• ICS / categories: Pressure-technology / mechanical engineering — material models and pressure-vessel design (related to ASME BPVC Section VIII materials and PTCS activities).
• Edition / version: 2013 edition (STP-PT-056:2013).
• Number of pages: 62 pages (report length varies by distributor but commonly listed as 62 pages).

Scope

The scope covers evaluation and comparison of methods to derive monotonic and cyclic stress–strain curves and their parameters for the high-priority materials listed for construction under ASME Section VIII, Divisions 1 and 2. The study includes literature review, assessment of parameterization techniques, handling of scarce data (e.g., ultimate tensile strain), tangent-modulus considerations, validation using experimental curves, and recommendations for implementing usable curve parameter sets into ASME code practice.

Key topics and requirements

• Literature review and gap analysis for material stress–strain characterizations.
• Methods for parameterizing monotonic stress–strain curves from limited data points.
• Definition and treatment of ultimate tensile strain where experimental data are sparse.
• Evaluation of tangent-modulus and other curve-fitting approaches for design use.
• Development and parameterization of cyclic stress–strain curves for fatigue/ratcheting assessment.
• Proposals for how stress–strain curve parameters could be adopted into ASME Section VIII design rules.

Typical use and users

Intended for pressure-vessel and pressure-equipment designers, materials engineers, ASME code committee members, researchers working on constitutive models for metals, fatigue analysts, and manufacturers who need standardized parameter sets or methods to generate stress–strain curves for materials listed in ASME Section VIII, Divisions 1 and 2. The report supports both code development and engineering application.

Related standards

Directly related to ASME Boiler & Pressure Vessel Code (BPVC), Section VIII (Divisions 1 and 2) material and design requirements; complements ASME PTCS/STP research products and other ASME materials and fatigue/strength guidance documents used for pressure-technology design. Users should consult the current ASME BPVC and associated PT standards when applying recommendations.

Keywords

stress–strain curve, cyclic stress–strain, parameterization, tangent modulus, ultimate tensile strain, ASME Section VIII, pressure vessel materials, fatigue curves, material models, STP-PT-056.

FAQ

Q: What is this standard?

A: STP-PT-056:2013 is an ASME technical report (STP) titled "Extend Stress-Strain Curve Parameters and Cyclic Stress-Strain Curves to All Materials Listed for Section VIII, Divisions 1 and 2 Construction," providing evaluation and recommended methods for generating stress–strain parameters for pressure-vessel materials.

Q: What does it cover?

A: It covers methods to derive monotonic and cyclic stress–strain curves and parameters (including handling of limited data), assessment of approaches such as tangent-modulus fits, and recommendations for implementing curve parameters into ASME code practice for Section VIII materials.

Q: Who typically uses it?

A: Pressure-vessel designers, materials engineers, fatigue analysts, ASME code committee members, and researchers developing or applying material constitutive models for code-related design work.

Q: Is it current or superseded?

A: The 2013 STP report is published and available as the 2013 edition. ASME indicates stabilized maintenance for this product; users should check ASME or authorized distributors for any reaffirmation or later related code changes before application.

Q: Is it part of a series?

A: It is an ASME STP (Standards and Technical Publications / PTCS) project report (STP-PT-056) produced under Pressure Technology Codes and Standards (PTCS) activities and complements other ASME research and code-development products related to Section VIII materials and methods.

Q: What are the key keywords?

A: stress–strain, cyclic stress–strain, parameterization, ASME Section VIII, tangent modulus, material curves, fatigue, STP-PT-056.