Stress Concentration Factors for ASTM E8/E8M-16a Standard Round Specimens for Tension Testing PDF Download
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Author: A. A. Kardak Publisher: ISBN: Category : Stress concentration Languages : en Pages : 9
Book Description
Occasionally, round specimens for tension testing that comply with ASTM standards fail in one of the transition regions between gage and grip sections. This occurs because of the stress concentration present in transition regions. When this happens, it is possible to seek stress relief by increasing fillet radii in these regions. The objective of this note is to quantify the relief afforded by increasing radii. The approach adopted to this end is finite element analysis that is carefully verified. Stress concentration factors are thus accurately determined to three figures for all of the various types of standard round specimens in ASTM E8/E8M-16a, Standard Test Methods for Tension Testing of Metallic Materials.
Author: A. A. Kardak Publisher: ISBN: Category : Stress concentration Languages : en Pages : 9
Book Description
Occasionally, round specimens for tension testing that comply with ASTM standards fail in one of the transition regions between gage and grip sections. This occurs because of the stress concentration present in transition regions. When this happens, it is possible to seek stress relief by increasing fillet radii in these regions. The objective of this note is to quantify the relief afforded by increasing radii. The approach adopted to this end is finite element analysis that is carefully verified. Stress concentration factors are thus accurately determined to three figures for all of the various types of standard round specimens in ASTM E8/E8M-16a, Standard Test Methods for Tension Testing of Metallic Materials.
Author: American Society for Testing and Materials Publisher: ISBN: Category : Languages : en Pages :
Book Description
Descripción del editor: "Significance and Use:4.1 Tension tests provide information on the strength and ductility of materials under uniaxial tensile stresses. This information may be useful in comparisons of materials, alloy development, quality control, and design under certain circumstances.4.2 The results of tension tests of specimens machined to standardized dimensions from selected portions of a part or material may not totally represent the strength and ductility properties of the entire end product or its in-service behavior in different environments.4.3 These test methods are considered satisfactory for acceptance testing of commercial shipments. The test methods have been used extensively in the trade for this purpose.Scope:1.1 These test methods cover the tension testing of metallic materials in any form at room temperature, specifically, the methods of determination of yield strength, yield point elongation, tensile strength, elongation, and reduction of area.1.2 The gauge lengths for most round specimens are required to be 4D for E8 and 5D for E8M. The gauge length is the most significant difference between E8 and E8M test specimens. Test specimens made from powder metallurgy (P/M) materials are exempt from this requirement by industry-wide agreement to keep the pressing of the material to a specific projected area and density.1.3 Exceptions to the provisions of these test methods may need to be made in individual specifications or test methods for a particular material. For examples, see Test Methods and Definitions A370 and Test Methods B557, and B557M.1.4 Room temperature shall be considered to be 10 to 38°C [50 to 100°F] unless otherwise specified.1.5 The values stated in SI units are to be regarded as separate from inch/pound units. The values stated in each system are not exact equivalents; therefore each system must be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.1.6 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.1.7 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." (AENOR).
Author: Walter D. Pilkey Publisher: John Wiley & Sons ISBN: 1119532523 Category : Technology & Engineering Languages : en Pages : 816
Book Description
The bible of stress concentration factors—updated to reflect today's advances in stress analysis This book establishes and maintains a system of data classification for all the applications of stress and strain analysis, and expedites their synthesis into CAD applications. Filled with all of the latest developments in stress and strain analysis, this Fourth Edition presents stress concentration factors both graphically and with formulas, and the illustrated index allows readers to identify structures and shapes of interest based on the geometry and loading of the location of a stress concentration factor. Peterson's Stress Concentration Factors, Fourth Edition includes a thorough introduction of the theory and methods for static and fatigue design, quantification of stress and strain, research on stress concentration factors for weld joints and composite materials, and a new introduction to the systematic stress analysis approach using Finite Element Analysis (FEA). From notches and grooves to shoulder fillets and holes, readers will learn everything they need to know about stress concentration in one single volume. Peterson's is the practitioner's go-to stress concentration factors reference Includes completely revised introductory chapters on fundamentals of stress analysis; miscellaneous design elements; finite element analysis (FEA) for stress analysis Features new research on stress concentration factors related to weld joints and composite materials Takes a deep dive into the theory and methods for material characterization, quantification and analysis methods of stress and strain, and static and fatigue design Peterson's Stress Concentration Factors is an excellent book for all mechanical, civil, and structural engineers, and for all engineering students and researchers.
Author: Rudolph Earl Peterson Publisher: Wiley-Interscience ISBN: Category : Science Languages : en Pages : 342
Book Description
Good,No Highlights,No Markup,all pages are intact, Slight Shelfwear,may have the corners slightly dented, may have slight color changes/slightly damaged spine.
Author: NA. Noda Publisher: ISBN: Category : Automotive medicine Languages : en Pages : 13
Book Description
In this work, stress concentration factors Kt for a flat bar with circular-arc or V-shaped notches are considered based on the exact solutions for special cases and accurate numerical results. Then, a set of Kt formulas useful for any notch shape is proposed. The conclusions can be summarized as follows. For the limiting cases of deep (d) and shallow (s) notches, the body force method is used to calculate the Kt values. Then, the formulas are obtained as Ktd and Kts. Next, the notch shape is classified into several groups according to the notch radius and notch depth. Then, the least squares method is applied for calculation of Kt/Ktd and Kt/Kts. Finally, convenient formulas are proposed that are useful for any notch shape in a flat test specimen. The formulas yield stress concentration factors with less than 1% error for any notch shape in a flat test specimen.
Author: NA. Noda Publisher: ISBN: Category : Body force method Languages : en Pages : 10
Book Description
In this work stress concentration factors Kt for a flat bar with fillets are considered on the basis of exact solutions now available for special cases and accurate numerical results. Then, a convenient Kt formula useful for any dimensions of the fillet is proposed. The conclusions can be summarized as follows.
Author: MG. Garrell Publisher: ISBN: Category : Elastic waves Languages : en Pages : 6
Book Description
Experimental results showed that ASTM D 638 Type IV flat tension specimens, made of a Nylon-11 matrix containing a large volume concentration of Nd-Fe-B particulates, failed at a location where the straight gage section of the specimen ends and the curved transition region begins. The stress distribution in this specimen was analyzed using the finite-element method, and it was found that there is a stress concentration at this location. The stress distributions in tension specimens with both single- and double-arc transition regions were analyzed and stress concentration factors were calculated. A linear relationship between the magnitude of the stress concentration factor and the ratio of the width in the gage section and the arc radius of the transition region is identified. This study shows that it is possible to reduce the magnitude of the stress concentration factor for the ASTM D 638 Type IV flat tension specimen by redesigning the specimen geometry without changing its overall size.
Author: A. A. Kardak
Author: A. A. Kardak
Author: American Society for Testing and Materials
Author: Walter D. Pilkey
Author: Rudolph Earl Peterson
Author: ASTM International
Author: NA. Noda
Author: NA. Noda
Author: MG. Garrell
Author: ASTM International
Author: Walter A. Backofen