What is the time period required to determine the ultimate value of the intrinsic relaxation for steel strands?

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Why the temperature stress in a statically determinate structures corresponds to no change in stress resultant?

equilibrium

03 April 2017 6,444 4 View

Do concrete have relaxation?

Exclude the effect of shrinkage

03 April 2017 3,552 4 View

Creep sometime called plastic flow. The internal mechanism of creep may be due to one or a combination or reasons. What are these reasons?

interpretation of creep

03 April 2017 1,596 0 View

In vibration analysis of multi-degree of freedom system, what is the value of the off-diagonal elements of the consistent mass matrix?

Vibration analysis

02 March 2017 8,876 0 View

What is the minimum diameter of longitudinal reinforcement of a column?

how many mm?

02 March 2017 4,252 2 View

Is it correct that the value of the prestressing force which calculated by ACI code and AASHTO equals Aps*fpi?

why these codes ignored the effect of the nonprestressed steel and concrete on this value?

01 January 1970 5,335 9 View

What is the degree of the formula used to determine the depth of compression zone in members subjected to axial load and uniaxial bending moment?

columns

01 January 1970 6,151 12 View

How the descending branch of the stress-strain diagram of concrete under uniaxial compression can be determined experimentally?

What type of compression machines shall be used?

01 January 1970 7,082 6 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

Sample dilution for quantitative analysis using ELISA?

If the detection range is in ng/ml but the reference range is in ug/ml for a molecule or protein in serum or plasma .how to dilute and what is the initial volume to be taken for quantitative analysis

02 March 2021 7,670 3 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

How Can I bring as much common elements in steel as possible to calculate stable phase(s) in OpenCalphad?

As I was tweaking step-by-step OpenCalphad6 Macros step1.ocm involving phase and thermal property calculation of a High-speed steel, I could not incorporate more than 6 elements in the steel...

01 March 2021 8,840 1 View

I need to accelerate corrosion in steel parts that are used in a salt-water environment. Is there a technique for doing so?

I have a structure that employs d-ring swiveling tie-downs that corrode during use and become "frozen". I have sample swivel assemblies that I wish to corrode to see if I can free them using one...

01 March 2021 3,739 3 View

Which period is considered as study period in research?

Is that starting from proposal development to result writeup or just from data collection to result writeup and reporting (publishing)?

28 February 2021 910 2 View

Why is my platinum counter electrode getting dirty during electrodeposition?

I am conducting anodic electrodeposition of MnO2 onto a stainless steel substrate, using a platinum strip as a counter electrode. This is done galvanostatically, with the current held between 5...

27 February 2021 1,829 3 View

Is there any limitation of number of variables when doing Panel Data ARDL model analysis in Stata 13.0 version?

I have one dependent variable (HDI) and 14 independent variables within the time period 1990 to 2016. when I run the command (xtpmg.............pmg) the answer is *matsize too small* then I...

23 February 2021 9,448 5 View

What kind of steel moulds are used for hot pressing metal powders?

My main concern is that the metal powders should not weld to the mold surface and I should easily be able to eject out the pressed samples. I am looking for alternative for graphite moulds. The...

22 February 2021 2,965 4 View