Adhesives. Determination of dynamic resistance to cleavage of high-strength adhesive bonds under impact wedge conditions. Wedge impact method

In the present study, galvanized High Strength Interstitial Free (HIF) steel sheets, and Dual Phase (DP780) steel sheets were used for the investigations. Resistance spot weld joints were fabricated between dissimilar steel sheets. The variation in dynamic resistance (DR) with the change in welding process parameters such as weld current, weld time and electrode force were used for establishing the range of adequate weld nugget formation parameters. Effect of these parameters over tensile strength, nugget diameter and the observed failure mode was studied using one factor at a time (OFAT) approach. Microstructure and hardness of parent metal, fusion & HAZ region has also been studied.

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Bestimmung der Dauerhaftigkeit von Hochleistungsbeton mit Hilfe des CDF-Tests / Determination of the durability of high performance concrete by means of CDF-test

Restoration of Buildings and Monuments ◽

10.1515/rbm-1999-5340 ◽

1999 ◽

Vol 5 (1) ◽

pp. 29-40

Author(s):

R. Krumbach ◽

U. Schmelter ◽

K. Seyfarth

Keyword(s):

Frost Resistance ◽

High Strength Concrete ◽

High Performance ◽

High Performance Concrete ◽

High Strength ◽

Strength Concrete ◽

Factors Influencing

Abstract Variable obsen>ations concerning frost resistance of high performance concrete have been made. The question arises which are the decisive factors influencing durability under the action of frost and de-icing salt. The proposed experiments are to be carried out in cooperation with F.A.- Finger - Institute of Bauhaus University Weimar. The aim of this study is to determine possible change of durability of high strength concrete, and to investigate the origin thereof. Measures to reduce the risk of reduced durability have to be found.

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High Strength Combined Support Technology in Deep High Stress Soft Rock Roadway

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.524-527.598 ◽

2012 ◽

Vol 524-527 ◽

pp. 598-603

Author(s):

Nian Jie Ma ◽

Zhi Qiang Zhao ◽

Hua Zhao ◽

Li Shuai Jiang

Keyword(s):

High Stress ◽

Soft Rock ◽

High Strength ◽

Parameter Determination ◽

Test Results ◽

Actual Measurement ◽

Computer Numerical Simulation ◽

Soft Rock Roadway ◽

Rock Roadway

In order to solve the serious damage and repeat revision problem of high stress soft rock roadway in deep -950 level of Tangshan coal mine, based on the theory of the maximum stress level, together with the actual measurement of geostress and the laboratory mechanical parameters of rock-core and computer numerical simulation, the high strength combined support technology and supporting parameters are determined and the engineering test has been done. The engineering test results show that the parameter determination of high strength combined support technology, which based on the actual measurement of geostress, can effective solve the support issue of high stress soft rock roadway and provide useful experience for similar engineering problems.

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Use of DNVGL-RP-C203 for Determining the Fatigue Capacity of Connectors

10.1115/omae2021-62880 ◽

2021 ◽

Author(s):

Anthony Muff ◽

Anders Wormsen ◽

Torfinn Hørte ◽

Arne Fjeldstad ◽

Per Osen ◽

...

Keyword(s):

Finite Element ◽

Fatigue Testing ◽

Experimental Testing ◽

High Strength ◽

Element Model ◽

Fatigue Analysis ◽

Full Scale ◽

The Finite Element Model

Abstract Guidance for determining a S-N based fatigue capacity (safe life design) for preloaded connectors is included in Section 5.4 of the 2019 edition of DNVGL-RP-C203 (C203-2019). This section includes guidance on the finite element model representation, finite element based fatigue analysis and determination of the connector design fatigue capacity by use of one of the following methods: Method 1 by FEA based fatigue analysis, Method 2 by FEA based fatigue analysis and experimental testing and Method 3 by full-scale connector fatigue testing. The FEA based fatigue analysis makes use of Appendix D.2 in C203-2019 (“S-N curves for high strength steel applications for subsea”). Practical use of Section 5.4 is illustrated with a case study of a fatigue tested wellhead profile connector segment test. Further developments of Section 5.4 of C203-2019 are proposed. This included acceptance criteria for use of a segment test to validate the FEA based fatigue analysis of a full-scale preloaded connector.

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