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Keywords: stress concentration
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-25810-MS
... tests, 150 MPa (21.75 ksi), failed in the conductor connector. A second phase of testing eliminated the stress concentrations from the conductor connector design and welded the connector profile halves together. All phase 2 tests were performed at the higher cyclic stress range, and failed in the X56...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2009
Paper Number: OTC-20269-MS
... is fundamental for economic production from nano-darcy permeability gas shales. By incorporating anisotropic elastic deformation, to better represent the behavior of unconventional tight gas reservoirs, we facilitate the understanding of near- wellbore stress concentrations and their effect on fracture...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2006
Paper Number: OTC-18276-MS
... damage rate lake seneca coverage case stress concentration vibration mode number pipe upstream oil & gas straked region frequency strake coverage configuration strain gauge equation offshore technology conference bare pipe high mode number helical strake strake Copyright...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2003
Paper Number: OTC-15373-MS
... design strain concentration stress concentration slay carrier pipe offshore pipeline Copyright 2003, Offshore Technology Conference This paper was prepared for presentation at the 2003 Offshore Technology Conference held in Houston, Texas, U.S.A., 5 8 May 2003. This paper was selected...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1996
Paper Number: OTC-8048-MS
... to uninspectable critical joints. history h2s management pipeline corrosion oilfield chemistry stress concentration year old semisubmersible assessment well integrity materials and corrosion brace life extension structural life extension riser corrosion subsurface corrosion fatigue analysis...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1993
Paper Number: OTC-7280-MS
... Abstract Welding residual stresses and stress concentrations are main factors whichdetermine the load carrying capacity of welded structures under multicyclicloading conditions as typically experienced by ships and offshore structures. To improve fatigue performance the E. O. Paton Institute...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1993
Paper Number: OTC-7345-MS
... plastic hinge evaluation strength stress field design optimization perforation deflection plastic deformation diameter failure load calculation concentration optimization perforation area stress concentration OTC 7345 Evaulation and Design Optimization of Perforated Casing C.C. Hair...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 7–10, 1990
Paper Number: OTC-6457-MS
... for the inherently low fatigue strength of welded joints. In addition, grinding changes the local geometry at the weld toe and provides a lower stress concentration. When grinding is carried out to remove fatigue cracks however, the resulting excavation depth is likely to be a significant propagation of the wall...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 27–30, 1987
Paper Number: OTC-5556-MS
... our attention on to avoid high local stress concentration. We have developed effective measures to reduce the high local stress concentration at the brace joints of a semi-sub rig, and in fact this new technique was applied to an actual semi-sub rig. 2. Introduction Recently, many semi-sub rigs...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1982
Paper Number: OTC-4331-MS
... known to be affecting the SSC such as grain size, cold work and hardenability are reviewed with authors own data from the view-point of the local stress concentration. The authors also show that their findings well-explain.most of the so-far prevalent empirical knowledges to improve the SSC resistance...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1982
Paper Number: OTC-4198-MS
... stub weld prep upstream oil & gas diameter wall thickness accuracy cast node cast steel node metals & mining artificial intelligence optimisation node node design thickness prototype stress concentration specification weld platform defect mooring system subsea system...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1980
Paper Number: OTC-3692-MS
... ABSTRACT Tests were conducted on Full-scale tubular joints (1) to investigate the effects of joint scale and steel strength on the stress concentration and ultimate failure characteristics of the joints and (2) to evaluate weld defect tolerances for the prevention of brittle fracture. Simple T...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1975
Paper Number: OTC-2205-MS
... Abstract Fatigue cracking caused by stress concentrations in tubular joints has been observed in some fixed platforms installed in hostile environments such as the North Sea. Consequently, the ability to assess the magnitude of the stress concentration is a prerequisite to dealing...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1975
Paper Number: OTC-2261-MS
..., and these members transfer the applied forces through the joints into the legs. Designers make a concerted effort to design the joints so that the load transfer will be as efficient as possible. Nevertheless, stress concentrations will occur in the vicinity of the member intersection. natural period...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–7, 1974
Paper Number: OTC-2117-MS
... in design of both unstuffy and stiffened tubular joints on the stress-concentration factor has been studied. In this context the current API recommendations for simple tubular joint design are discussed. Calculations have demonstrated that in the design of large tubular joints allowance should be made...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 28–May 1, 1973
Paper Number: OTC-1821-MS
... of stiffening elements. Both effects cause severe stress concentrations. Under increasing static loads certain joints may nevertheless perform satisfactory because of a redistribution of the load transfer after initial yielding occurs. However, in connections subjected to repeatedly fluctuating loads serious...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 18–20, 1971
Paper Number: OTC-1442-MS
... by the finite element method. The result of the above shows that the distribution of stress at this joint is not so complicated as that at the tubular joint and that the coefficient of stress concentration in the former is less than that in the latter. The configuration of the box-type joint being...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 18–20, 1971
Paper Number: OTC-1391-MS
... that Eastern and Western Canada and The North Sea are the most severe ocean wave areas where offshore exploration is active. offshore technology conference wave height sedco 135 gauge engineer strain gauge stress concentration western canada field measurement otc 1391 fatigue life drilling...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 17–20, 1969
Paper Number: OTC-1062-MS
... strength fatigue test reserve strength experimental result texas loading fatigue strength specimen thickness weld reservoir characterization stress concentration upstream oil & gas isobar axis brace tubular joint shear area bijlaard chord principal stress chord wall...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 17–20, 1969
Paper Number: OTC-1046-MS
.... Grinding the weld reinforcement flush improves fatigue strength of welded joints by eliminating the stress concentration at the toe of the weld. Cathodic protection improves fatigue strength of unwe1ded plate in sea water by eliminating corro- sion. INTRODUCTION Action of wind, waves, and sometimes ice...

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