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Pretensioning

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Published: 01 January 2006
Fig. 17 Examples of clamping fixtures for pretensioning. Source: Ref 12 More
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002368
EISBN: 978-1-62708-193-1
... ) versus bolt diameter for bolts with standard metric threads. Source: Ref 14 Effect of Preload Tightening, or preloading, an axially loaded bolt-nut combination increases the fatigue strength significantly. A rule of thumb is “pretension to twice the maximum fatigue load” ( Ref 2 ). Higher...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006072
EISBN: 978-1-62708-172-6
... and tensile working loads. This is done by either pretensioning or posttensioning. Pretensioning consists of placing the reinforcing steel, in the form of cables, in tension by pulling them and then pouring the concrete around the cables. Once the concrete has hardened, the tension is released, placing...
Book Chapter

By R. Kopp, J. Schulz
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005132
EISBN: 978-1-62708-186-3
... and thus the profitability of the shot peening process. This is especially valid for simple shapes for which simple prestressing facilities can be used ( Fig. 17 ). Fig. 17 Examples of clamping fixtures for pretensioning. Source: Ref 12 Materials In principle, all materials having...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005110
EISBN: 978-1-62708-186-3
... system with moving and fixed punches ( Fig. 18 , Fig. 19 ). Making use of the straight-side principle, the monoblock press frame as a welded construction offers good dimensional rigidity and avoids vibrations. A clearance-free pretensioned slide gib is used. A central support in the upper and lower die...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003407
EISBN: 978-1-62708-195-5
... maintain the correct hydrodynamic shape when subjected to applied loads from the water and from the rig and appendages. The mast, in conjunction with its associated rigging, transfers the forces from the sails to the yacht hull, thereby propelling the vessel through the water. The pretension...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004168
EISBN: 978-1-62708-184-9
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003843
EISBN: 978-1-62708-183-2
Book Chapter

By Allan B. Dove
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001017
EISBN: 978-1-62708-161-0
... pretensioning or posttensioning concrete structural members. The stress-relieved product can be applied as a single wire or as a strand that has been stress relieved after stranding. This product is described in American Society for Testing and Materials (ASTM) specifications as follows: A 648—Wire...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006814
EISBN: 978-1-62708-329-4
... of the bolted connection (e.g., snug tight, pretensioned, or slip-critical), the nature of the bolt holes (e.g., standard diameter, long slotted, or oversized), and other such factors must be considered. The sequence of assembly (welding first and bolting afterward or vice versa) will affect the composite...