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The BS5500 code considers the permissible stress in terms of the nominal design strength f.
As a permissible stress, yield strength at 300 °C was used.
Limit state design stresses are shown to be larger than permissible stress design stresses.
It has been stipulated that residual strain in cyclic behavior plays a prime role in defining the permissible stress level.
On the other hand, in case of the F82H backwall, a maximum thermal stress was below the permissible stress (455 MPa).
In the case of the 316 stainless steel backwall, the maximum thermal stress was more than the permissible stress (164 MPa).
Similar(49)
Therefore it is necessary to max out permissible stresses during the design process.
However, in order to prevent geometric instabilities during deployment and after pressurization, the design should eliminate as much excess material as possible while not exceeding the permissible stresses of the material.
By wearing into the plan, Mmax values for all values of N, a curve N = f(Mmax), which is the field limit curve of permissible stresses for the considered section, is obtained.
Although the modular arthroplasty is completely unconstrained (there are no tracks in the polyethylene of the tibial components), and although some latitude in orientation of the implants is permissible, stresses applied to the implant by improper placement may lead to early failure.
Four polymers used for bonding were tested and a value for the permissible shear stress is proposed for each strengthening system.
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