factor of safety for tensor

[mekafime]

Hi,
I have a force 1500 kgf and I need to select a tensor, but I don´t know the factor of safety, in the tensor catalog states that the maximum load is 2.5 times the test load. If neccesary to apply another safety factor?

 

[btrueblood]

I've never broken a tensor in over 30 years as an engineer, even when grossly inverted and subjected to Gauss-Siedel successive displacement. Stretched 'em a bit, but they held up ok.

...

But, it occurs to me that what I call a tensor and what you mean by a tensor might be different animals?

https://en.wikipedia.org/wiki/Tensor

 

[drawoh]

mekafime,

Kilograms are a unit of mass, not force.

How certain are you of your force? How catastrophic will it be if your tensor fails? Is there a good reason to not use a gross safety factor?

--
JHG

 

[dvd]

What is a tensor in this context? This term is not in my vocabulary.

 

[itsmoked]

Take your pick:

Tensor Stacker Crane:

French for a turnbuckle?

Keith Cress
kcress -

http://www.flaminsystems.com

 

[handleman]

Oooh, good call, Keith. OP is from Peru... Good ol' Google Translate says that "turnbuckle" translates to "tensor" in Spanish.

 

[itsmoked]

That was the only one I thought made sense but btrues 'direction statement' left me doubting it was turnbuckles since I don't really see an angular aspect in their use.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[mekafime]

Hahah, the file attached.

 

[mekafime]

is for a tensile structure the max force is 1500 kgf or 14.71 kN , According to a national manufacturer one of them 3/8 "supports a load of 1500 kgf and has been tested with a force greater than 2.5 times the load.I want to know if that 2.5 is enough as a safety factor or should I multiply by another factor more? This would make it use a larger one for example 1/2 "

 

[GregLocock]

In Australia I'd be looking at a design FoS of at least 6 and probably 8, and a tested FoS of half that. If it breaks then people will be clobbered by tent poles. Tent poles are cheap, peoples' skulls are not. That needs to be based on wind snow and rigging loads, not just the theoretical load.

Cheers

Greg Locock


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