Recent content by alexisonsmith

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    S-N Curve - not even the manufacturer knew this one

    I thought was aluminium I thought Steel's did have a fatigue limit?
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    S-N Curve - not even the manufacturer knew this one

    It is a mild steel with the following characteristics: 0.2% - C 0.35% - Si 0.9% - Mn 0.05% - P 0.05% - S
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    S-N Curve - not even the manufacturer knew this one

    Cold Drawn Seamless Steel - CFS BKRLS BS6323 Part 4 CFS 3-Bk I tried to find the S-N Curve by I can't find it at all!
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    S-N Curve - not even the manufacturer knew this one

    Hey, So I am currently trying to workout the fatigue characteristics of my Formula Student Space frame design, I am using Cold Drawn Seamless mild steel. I have the following mechanical properties: Re - 360 MPa Rm - 450 MPa I think these are the effective stress intensity range and...
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    Fracture Toughness Test: Understanding ASTM E399-09 vs BS 7448 Methods

    Hello, What is the general differences between the ASTM E399-09 method and the BS 7448 method? Thanks, Alexisonsmith
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    Unique Features of Mixed Refrigerants - Alexisonsmith

    Hey, Does anyone know the unique features of mixed refrigerants and why they mix refrigerants instead of using just pure refrigerants? Thanks, Alexisonsmith
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    Refrigeration - Fouling in the sizing evaporator and condenser

    Hey, I am trying to determine the importantance and difference of fouling in sizing the evaporator and condenser in a Refrigeration cycle? Thanks, Alexisonsmith
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    Vibrations problem - Transverse in a string under tension

    Yes it is Q.2 on the sheet which I have attached.
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    Vibrations problem - Deriving the natural frequencies

    Homework Statement A thin beam of length L (flexural Stufness EI, cross-sectional area A, density p) is connected to a linear spring of stiffness K_s at each end. Derive the governing equation for the natural frequencies of transverse vibrations from the beam equation and boundary conditions...
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    Vibrations problem - Transverse in a string under tension

    Homework Statement A cord of length L density p and cross-sectional area S is under tension T with the left end fixed and the right end attached to a spring-mass sstem. Show that the equation for the natural frequencies is given by: tan(wL/c) = -(T/kL)((wL/c)/(1-(w/w_n)^2)) Homework...
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    Can You Permanently Delete a Thread on a Forum?

    Deleting a thread!? Is it possible to completely remove a thread?
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    Calculate COP & VCC for Refrigerant - Urgent Help Needed

    Brilliant I will work on that, in the mean time I am also woking on another paper I have got very far however I cannot seem to calculate the reduced ideal density, I understand the formula however I do not understant where the range of densities come from? Here is the link to the paper...
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    Calculate COP & VCC for Refrigerant - Urgent Help Needed

    I am currently trying to explain in an assigment different papers on refrigerants, one of the ways in which this is being done is by reproducing the results which were obtained in the paper, I am currently trying to explain the results which were found by calculating one set of results for each...
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    Calculate COP & VCC for Refrigerant - Urgent Help Needed

    So T is the state point in question which in this case is 30? But then what would be the state point in question for P?
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    Calculate COP & VCC for Refrigerant - Urgent Help Needed

    By using the PR equations I am assuming the following 2 equations: Tr=T/Tc Pr=P/Pc Am I assuming that T= the evaportaing temperature or the condensing temperature?