Learning Forum

[peteroznewman]

I expect the Tensile Strength has a range due to various depths of flaws on the surface. A flaw could be a scratch on the surface or an imperfection in the single crystal structure. A surface with a shallow flaw has higher strength than a surface with a deep flaw.

Another way to decide if a given load is at risk of fracture is to assume a particular flaw depth on the surface and use that to calculate a Fracture Mechanics solution. Read the chapters on that in Help.

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v231/en/ans_frac/Hlp_G_STRFRINTRO.html

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v231/en/wb_sim/ds_fracture.html

You need to compare the Stress Intensity Factor K(1) calculated from the flaw size and the nominal stress with the Fracture Toughness K(1c), a material property.

Here is a paper on the Fracture Toughness of Diamond.

I don’t know what Strength, Fracture = 1000 MPa means in the table of properties.