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Effect Of Strain Rate On Material Properties Of Sheet Steels And Structural Strengths Of Cold Formed Steel Members
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Book Synopsis Effect of Strain Rate on Material Properties of Sheet Steels and Structural Strengths of Cold-formed Steel Members by : Maher Kassar
Download or read book Effect of Strain Rate on Material Properties of Sheet Steels and Structural Strengths of Cold-formed Steel Members written by Maher Kassar and published by . This book was released on 1990 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In structural design, the material properties of steels and the strengths of cold-formed steel members are affected by strain rate. Two subjects were investigated experimentally and analytically in this study. They are 1) effect of strain rate on mechanical properties of sheet steels in tension and compression, and 2) structural strengths of stub columns and beams subjected to dynamic loads. Three sheet steels with nominal yield strengths ranging from 35 to 100 ksi were studied under different strain rates. A total of 124 tensile coupons and 54 compressive coupons were tested in this phase of study. The structural strengths of 37 stub columns and 30 beam specimens fabricated from 35XF sheet steel were investigated in the second phase of this study under different strain rates. The results showed that the material properties as well as the strengths of the structural members increased with the strain rate. The amount of increase was found to be dependent on the material yield strengths and the strain rates used in the tests. The effective width approach included in the current AISI Automotive Steel Design Manual was utilized for the evaluation of member strengths using static and dynamic yield stresses corresponding to the strain rates used in the tests. Good agreement was achieved between the predicted and tested member strengths when using the dynamic yield stresses in the comparison"--Abstract, leaf iii.
Book Synopsis Influence of Strain Rate on the Mechanical Properties of Sheet Steels and Structural Performance of Cold-formed Steel Members by : Chi-Ling Pan
Download or read book Influence of Strain Rate on the Mechanical Properties of Sheet Steels and Structural Performance of Cold-formed Steel Members written by Chi-Ling Pan and published by . This book was released on 1992 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of strain rate on the mechanical properties of sheet steels and structural performance of cold-formed steel members by :
Download or read book Influence of strain rate on the mechanical properties of sheet steels and structural performance of cold-formed steel members written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1990 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Research and Developments in Cold-formed Steel Design and Construction by : Wei-wen Yu
Download or read book Recent Research and Developments in Cold-formed Steel Design and Construction written by Wei-wen Yu and published by . This book was released on 1990 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Automotive Body Materials written by and published by . This book was released on 1993 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Behavior of Cold-formed Steel Members Made of Thick Sheets and Plates by : Ai-Shen Liu
Download or read book Structural Behavior of Cold-formed Steel Members Made of Thick Sheets and Plates written by Ai-Shen Liu and published by . This book was released on 1974 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: "It is well-known that the current AlSI Specification for the design of cold-formed steel structural members has been developed mainly for thin steel sections. In order to extend the applicability of the specification for the design of cold-formed steel members thicker than 1/4 in., both analytical and experimental investigations have recently been conducted with special emphases on the effects of cold work on the mechanical properties of corners and the strength of bolted connections. For the effects of cold work, previous investigations have shown that the phenomena of strain hardening and strain aging are main factors which affect the mechanical properties of corners. The yield point and ultimate tensile strength of corners are larger than those in virgin steels, and the ductility of virgin steels will be decreased as a corner is formed. Mathematical corner models developed by other investigators for the prediction of tensile yield points of corners were studied in detail. It was found that the increase in yield point of corners is dependent upon the ratio of virgin ultimate tensile strength to virgin tensile yield point, the ratio of inside bend radius to the thickness of the corner, and the virgin tensile yield point. In order to study the possible effects of thickness on the mechanical properties of corners, a total of one hundred corner tests have been conducted. The corner specimens used in the test program were cold-formed from 1/2 in. and 1 in. thick A36 and A588 steel plates with R/t ratios of 3, 5 and 6. On the basis of the test data obtained from the recent study and previous investigations, it was found that in addition to the above-mentioned three factors, the increase in yield point of corners also depends on the type of stress-strain curves of virgin steels, but is not directly affected by the thickness of corners. Consequently, modified equations were derived on the basis of a regression analysis which can be alternatively used for the determination of tensile yield point of corners, when the virgin steel has a sharp yielding type of stress-strain curve with a large plateau. In view of the fact that sharp yielding type of stress-strain curves is usually found for hot-rolled steels, and gradual yielding type of stress-strain curves is found for cold-reduced steels, the current AISI formulas can be used for cold-reduced steels and other steels having a sharp yielding type of stress-strain curve with a small plateau. It has been realized that the AISC Specification is primarily developed for the design of thick, hot-rolled steel members. Studies of the strength of bolted connections made of thick, cold-formed steel members were, thus, conducted mainly by comparing the AISI and AISC Specifications. Other specifications, recommendations, and standards being used abroad and the research work carried out at other universities were also reviewed and considered. From a study of design criteria for bolted connections listed in various specifications, it was found that the main difference for the design of bolted connections made of thin and thick steels is the allowable bearing stress and the related, required edge distance in line of stress. In order to study further the bearing capacity of bolted connections, a total of thirty single-shear and double-shear bolted connections were tested. The test specimens were fabricated from A36 and A570 steels with thicknesses of 11 ga., 3/16 in., and 1/4 in. From a thorough analysis of the available results of connection tests, two modified design equations were derived for the determination of the minimum edge distance in line of stress and allowable bearing stress using ordinary bolts. These modified equations not only apply to steels with various ductilities, but also close the gap between the AISI and AISC Specifications for allowable bearing stress. These equations also provide a conservative basis for the design of bolted connections using high-strength bolts. For purposes of design, simplified equations were also developed and recommended for the minimum edge distance and allowable bearing stress. With regard to other design requirements for bolted connections, such as allowable tension stress on net section and allowable shear stress on bolts, the current AISI design criteria can also be used for connections made of thick, cold-formed steel members "--Abstract, pages ii-iv.
Book Synopsis Structural Steel by : N. E. Shanmugan
Download or read book Structural Steel written by N. E. Shanmugan and published by . This book was released on 1995 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 4th Pacific Structural Steel Conference held in Singapore between 25th and 27th October 1995 aims to disseminate the latest information, data, expertise and technology related to design, performance and construction of steel structures - including steel bridges, tubular structures, marine and offshore structures, space frames and tall buildings. The papers published in these three volumes provide an essential reference source for all those involved with the design of steel structures.
Book Synopsis Effects of Cold Work in Cold Formed Steel Structural Members by :
Download or read book Effects of Cold Work in Cold Formed Steel Structural Members written by and published by . This book was released on 1970 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic Strength Properties of Structural Steel at Elevated Rates of Strain by : Matthew P. Murray
Download or read book Dynamic Strength Properties of Structural Steel at Elevated Rates of Strain written by Matthew P. Murray and published by . This book was released on 2020 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments were conducted on ASTM A572 50 and A992 steel over a range of intermediate strain rates in order to determine material strength properties of structural members subjected to dynamic loadings. The yield and ultimate tensile stress (UTS) of the steels were determined at increasing strain rates using a hydraulic apparatus and compared to static values obtained from ASTM E8 standardized tensile experiments. Results revealed that A572-50 steel exhibited an increase in yield stress of up to 35% and UTS of up to 20% as strain rate increased from 0.002 to 2.0 s-1. A992 steel demonstrated a similar increase in yield stress of up to 45% and UTS of up to 20%. Ratios of dynamic-to-static strengths were used to develop dynamic increase factor curves spanning the range of strain rates studied. These curves provide designers with material property values required for accurate and economical design of protective structures.
Download or read book Metals Abstracts written by and published by . This book was released on 1999-04 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of the Speed Deformation to Change of Local Mechanical Properties on Sheet Steels by : Mária Mihaliková
Download or read book Influence of the Speed Deformation to Change of Local Mechanical Properties on Sheet Steels written by Mária Mihaliková and published by LAP Lambert Academic Publishing. This book was released on 2011-04 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing the strain rate is formed in one of the ways of intensification of production forming. Strain rate is an important external factor that significantly affects the behavior of materials in the process of forming, but also the properties of the wrought products. Basic mechanical properties of metals detected by static tests appear insufficient in cases of distortion at high speeds. In the transition from static to dynamic way stresses the plasticity of materials is changed in wavelength due to the nature of the spread of tensions and deformations. Together the microstructure the substructure is changed too, that can affect the properties of strain hardening material. Tests transferred at high speeds of deformation are essentially designed to clarify the mechanical properties at higher speeds and tracking relations between deformation speed and deformation mechanism. Effect of strain rate on mechanical properties is now described by parametric equations. The parameters of these equations are a function of material structure, and therefore it is necessary to carry out experiments in particular to new developing steels.
Book Synopsis Effects of Cold-forming on Light-gage Steel Members by : Kenneth William Karren
Download or read book Effects of Cold-forming on Light-gage Steel Members written by Kenneth William Karren and published by . This book was released on 1965 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1989 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanical Properties of High Strength Sheet Steels by : M. Brad Parks
Download or read book Mechanical Properties of High Strength Sheet Steels written by M. Brad Parks and published by . This book was released on 1983 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In recent years fuel economy has become one of the major criteria for the the design of automobiles. In order to improve the efficiency of their vehicles many automotive designers are substituting high strength sheet steels for traditional materials of lower strength. This thesis discusses experimental work which was done to determine the representative mechanical properties and stress-strain relationships of a select group of high strength sheet steels with nominal yield strengths ranging from 80 to 140 ksi. The results show that high strength sheet steels are quite anisotropic with the variation in measured properties depending on the type of sheet steel, the direction of testing and the type of testing. The literature was reviewed in depth to determine the effects of strain rate and fatigue on the design of automotive components using high strength sheet steels. It was found that increasing strain rates generally increased the strength of these steels while decreasing their ductility. The literature review of fatigue analysis revealed that even the most accurate fatigue analysis methods currently available to the automotive engineer predict fatigue lives that differ substantially from the actual lives obtained from tests "--Abstract, leaf ii.
Book Synopsis The Effect of Strain Rate on the Tensile Properties of High Strength Multiphase Sheet Steels by : Ryan S. Kircher
Download or read book The Effect of Strain Rate on the Tensile Properties of High Strength Multiphase Sheet Steels written by Ryan S. Kircher and published by . This book was released on 2005 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1976 with total page 978 pages. Available in PDF, EPUB and Kindle. Book excerpt: