Axial strength of back-to-back cold-formed steel channels with edge-stiffened holes, un-stiffened holes and plain webs

Liquid crystalline polymers (solutions or melts) can be spun into fibers and films that have a higher axial strength and stiffness than conventionally processed polymers. These superior properties are due to the spontaneous molecular extension and alignment that is characteristic of liquid crystalline phases. Much of the effort in processing conventional polymers goes into extending and aligning the chains, while, in liquid crystalline polymer processing, the primary microstructural rearrangement involves converting local molecular alignment into global molecular alignment. Unfortunately, the global alignment introduced by processing relaxes quickly upon cessation of shear, and the molecular orientation develops a periodic misalignment relative to the shear direction. The axial strength and stiffness are reduced by this relaxation.Clearly there is a need to solidify the liquid crystalline state (i.e. remove heat or solvent) before significant relaxation occurs. Several researchers have observed this relaxation, mainly in solutions of hydroxypropyl cellulose (HPC) because they are lyotropic under ambient conditions.

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Effect of Rectangular Cold-Formed Steel on the Behavior of Double-Skinned Profiled Steel Sheet In-filled With Concrete under Axial Load

International Journal of Advances in Agricultural & Environmental Engineering ◽

10.15242/ijaaee.c1114038 ◽

2015 ◽

Vol 1 (2) ◽

Keyword(s):

Axial Load ◽

Steel Sheet ◽

Cold Formed Steel

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STRENX SECTION 900

Alloy Digest ◽

10.31399/asm.ad.sa0792 ◽

2017 ◽

Vol 66 (7) ◽

Keyword(s):

Fracture Toughness ◽

High Strength ◽

Bend Strength ◽

Bend Channel ◽

Cold Formed Steel ◽

The Common ◽

Hot Rolled ◽

Common Shape ◽

Minimum Yield ◽

Steel Section

Abstract Strenx Section 900 is a cold-formed steel section made of hot-rolled, high-strength steel with a minimum yield strength of 900 MPa (131 ksi). Its high strength combined with naturally stiff form enables construction of stronger and lighter structures. The common shape is a U-bend channel. This datasheet provides information on composition, physical properties, tensile properties, and bend strength as well as fracture toughness. It also includes information on forming, machining, and joining. Filing Code: SA-792. Producer or source: SSAB Swedish Steel Inc..

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Nonlinear FE analysis on stiffness and resistance of bolted cold-formed steel built-up joints

Structures ◽

10.1016/j.istruc.2021.04.098 ◽

2021 ◽

Vol 33 ◽

pp. 2520-2533

Author(s):

Feiliang Wang ◽

Yan Han ◽

Jian Yang

Keyword(s):

Fe Analysis ◽

Nonlinear Fe Analysis ◽

Cold Formed Steel

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