bulb stiffener

4 Ordinary stiffeners 4.1 Stiffeners not perpendicular to the attached plating Where the angle between the section web and the attached plating is less than 70°, the actual section modulus may be obtained [cm3] from the following formula: w=w 0·sin α w0 = actual section modulus [cm 3] of the stiffener assumed to be perpendicular to the plating

Because of the rounded edges, Bulb Flats are excellent stiffeners with a longer life span compared to angles in terms of corrosion-resistance and maintenance in ship, barge, and bridge construction. We supply bulb flats in a full -wide range of steel types and grades.

An improved composite stiffener and methods and tooling used to form the same. The stiffener includes one or more base flanges, a composite rod extending in an axial direction, a bulb cap surrounding the composite rod, and an upright web extending from the one or more base flanges to the base cap. The upright web includes a non-linear profile in the axial direction providing

4. The bulb stiffener of claim 1, wherein the one or more base flanges includes a pair of base flanges. 5. The bulb stiffener of claim 1, wherein the composite rod is comprised of a majority of fibers aligned in the axial direction. 6. The bulb stiffener of claim 5, wherein the upright web and bulb cap are comprised of +/−45-degree fibers.

An improved composite stiffener and methods and tooling used to form the same. The stiffener includes one or more base flanges, a composite rod extending in an axial direction, a bulb cap surrounding the composite rod, and an upright web extending from the one or more base flanges to the base cap. The upright web includes a non-linear profile in the axial direction providing the improved

with bulb-flanges can be used instead of other harder-to-produce and assemble sections like Hat- or Tee-stiffeners which have served the industry favorably for decades. Figure 1 illustrates the general cross-section of a bulb-flange as opposed to a regular Tee and I cross-section. Asymmetric bulb-flanges are preferred for the following reasons.

2.4.1.3 The combined net properties of HP and the JIS bulb profiles with stiffener web or with offset necessary to enable welding. see Figure 4.3.1(c).

b (mm) 5 6 7 8 60 3.41 80 4.41 5.06 5.72 100 6.32 7.13 7.96

Paint also adheres better to the rounded shapes of bulb stiffeners than the sharp corners of angle stiffeners, with prudent owners specifying that all sharp corners of angle stiffeners be

The bulb plates are the plate stiffener of choice for the shipbuilding industry due to their excellent strength to weight ratio. They feature a 

Size b. (mm) t. (mm) c. (mm) r. (mm) Section. (cm²) Metric. Weight. (kg/m) Surface. A 60 x 4 60 ±1,5 4 +0,7 / ‑0,3 13 3.5 3.58 2.81 0.146 60 x 5 60 ±1,5 5 +0,7 / ‑0,3 13 3.5 4.18 3.28 0.148 60 x 6 60 ±1,5 6 +0,7 / ‑0,3 13 3.5 4.78 3.75 0.150

This paper presents a practical method for designing bulb-flat-stiffened plating against local buckling, without limitations on section slenderness. The aim is to improve the current shape limitation requirements of BS 5400: Part 3, which are known to be unduly conservative.

Bulb bars/flats are asymmetrical plate stiffeners used for ship building hull construction (Ship Hull, Ballast Tanks, and Cargo Holds) & Bridges (Box 

The Bulb flat is a hot laminated steel product with a bulb in one or both of its edges. We produce bulb flats according to the 3.1.

Bulb flats are being used as plate stiffeners especially in the shipbuilding industry. Our supply width ranges from 60mm to 430mm, and can be supplied 

Jun 25,  · Bulb stiffeners are basic structural elements and widely used in ships and offshore platforms. Large amount of bulb stiffeners constitute the main frames of those engineering structures and help them to withstand complicated and harsh environmental loadings.

2 THE TEST CASE: HP STIFFENER JOINTS. The fatigue strength of butt joints between the typical shipbuilding stiffener, the bulb plate.

An investigation of the fatigue strength of three bulb plate stiffener joints is discussed. In addition to the usual joint with completely welded bulb, two further configurations are considered: one having a weakened bulb and another one having extra reinforcement to compensate for the unwelded bulb. The fatigue life for the usual and for the

BP (Bulb plates). ○ ABS (Unequal leg angles). ○ AB (Equal leg angles). ○ CB (Channel beams). ○ FB (Flat bars). Shape and dimensional tolerances. Package.

The subject of this research is the buckling behavior of a rectangular plate, with a bulb flat stiffener attached to one side of the plate. The stiffener cross section has a thin web and a bulb

This paper describes fatigue tests at stiffener end connections with bulb flats and angle bars and focuses on the question how far bulb flats are also prone to fatigue in view of the reduced