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  1. Jason8zhu

    Standard/Code for structural design of submarine veicle

    Dear All, Is there any LR or DNV Standard/Code for structural design of submarine veicle? Recommanded Practice for the design of tourist submarines？ Thanks.
  2. Jason8zhu

    Fatigue crack growth analysis considering spectral load

    Hi usecheijk, To perform the fatigue crack growth analysis, is there any FAR or AC can be followed? Thanks.
  3. Jason8zhu

    Question on the effects of eccentricity in AISC App.3.2 for FATIGUE

    Dear all, I am reading App.3.2 DESIGN FOR FATIGUE of AISC - 2005 and found the following on the effects of eccentricity -------------------------------------AISC App.3.2-------------------------------------------------- For axially loaded angle members where the center of gravity of the...
  4. Jason8zhu

    camber for steel i-beam as per US Code

    Hi all, the following is a US code requirement for camber: -------------------------------- 1.2.10 CAMBER (1995) R(2014) The camber of plate girders more than 90 feet in length shall be equal to the deflection produced by the dead load only. Plate girders 90 feet or less in length and rolled...
  5. Jason8zhu

    Fatigue Assessment Code/Practice for composites

    CFRP laminates under tension-compression stress. Thanks.
  6. Jason8zhu

    Fatigue Assessment Code/Practice for composites

    Dear all, we know there are lots of code and guidance for metal fatigue analysis.Any Fatigue Assessment Code/Practice for composites to follow? thanks.
  7. Jason8zhu

    What is the difference of DBTT & FATT

    Thanks metengr & EdStainless for your kindly interpretation.
  8. Jason8zhu

    What is the difference of DBTT & FATT

    Dear all, It seems that both DBTT & FATT are reflecting the temperature from ductile to brittle. Any difference between DBTT and FATT: -ductile-brittle transition temperature (DBTT) -fracture appearance transition temperature（FATT） Thanks.
  9. Jason8zhu

    Composite pipe: minimum barrel diameter of storage reel

    Thanks BigInch & LittleInch & bimr. After investigation, I found all you are right. The "minimum barrel diameter" is the min. diameter reeling/winding on the barrel.
  10. Jason8zhu

    What is the applicable Code/std for fracture assessment for Metals in Aricraft & Aerospace engg?

    Thanks Sparweb & rb1957 both your guidANce. I am a FEA guy for stress analysis and fatigue, sometimes, fracture assessment. For Ocen industry, I know BS 7910 was widely applied to assess Fatigue and Fracture. And I already had experience on this assessment. For Nuclear industry, I know R6 is...
  11. Jason8zhu

    What is the applicable Code/std for fracture assessment for Metals in Aricraft & Aerospace engg?

    Dear all， For metals in Aricraft & Aerospace, if we have fond some small flaws and we need to assess if the flaw will develop to crack that is not acceptable. What is the applicable Code/std to conduct fracture/fatigue assessment? Thanks.
  12. Jason8zhu

    3point of Zero Deflection of Pile

    why should have 3 points of zero deflections? is there any resource you get this infomation? I think one point is Ok and two point should be enough.
  13. Jason8zhu

    [QUESTION] Offshore structure H beam CODE check practice

    "the most offshore topside structural design codes are based on AISC for H beams and API for tubulars." -- Totally agree.
  14. Jason8zhu

    Composite pipe: minimum barrel diameter of storage reel

    Dear all, when I read a product introduction for a Composite pipe and find the "minimum barrel diameter of storage reel". Before that, I only know Min. ben radius. Could anybody introduce sth. on "minimum barrel diameter"? Thanks.
  15. Jason8zhu

    Alloy 625 - Norsok M-001

    For the ser, service of Alloy 625 in high temperature: 1st, the mechanical of Alloy 625 in high temperature is quite stable up to 130 degree. 2nd, the corrosion resistance is also very good as following: Alloy 625 has withstood many corrosive environments. In alkaline, salt water, fresh water...
  16. Jason8zhu

    Slenderness Ratio of Conductor Supported Platform

    To fremgym， For code/Rules?AISC, There is no limitation on Slenderness Ratio. However, large Slenderness Ratio will means less compressive capacity for column. So the allowable compressive load against the working load will dominates the design.
  17. Jason8zhu

    Definition of Knockdown Factor (KDF)

    I believe many of you guys has seen this term Knockdown Factor. I met this reduction factor in case of buckling of plates, corrosion. Can anybody give me some guidance on the actual meaning of Knockdown Factor (KDF)? Or any book/doc I can refer to? Thanks.
  18. Jason8zhu

    Why NICKLE is not taken into consideration in PREN(Pitting resistance equivalent number)

    Thank Mcguire and all friends on this thread. All your guidance not only enlighten my puzzlement but also embark me to learn more on alloy corrosion in seawater corrosion.
  19. Jason8zhu

    Design code\standard for composite structure

    Thanks, RPstress. The ETL is verybuseful for composite design on civil for me.
  20. Jason8zhu

    Stainless Steel 321

    Hi, Dicer, As far as my understanding, steel 321 is suspectible to Chloride and H2S corrosion. It thus not suitable using in seawater and oil gas structure within H2S. however, for the application in river and lake, i think it is OK.

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