Modelling of superplastic forming of hollow structures with goffered filler made of VT6 titanium alloy

Abstract

The superplastic forming process of the VT6 titanium alloy three‐layered hollow structures with goffered filler are investigated. Based on the results of experimental studies and on the results of finite element modeling, we determine rational parameters of the process such as gas pressure increase rate, when superplastic flow condition is satisfied for ribs, and the processing time is minimal.

Modeling and experimental analysis in lifespan of a precision epoxy resin mold

“…The maximum stresses and computational time as a function of element number are shown, Figure . As can be seen, the computational time increases with increasing the number of elements . The computational time increases drastically when the element number exceeds 34235.…”

Finite element modeling of superplastic forming of ideal and intentionally defected titanium alloy products for the purpose of non‐destructive control

“…One of such processes is the superplastic forming (SPF), combined with pressure welding . The use of superplastic forming technology allows to produce parts and structures that cannot be manufactured by other methods, for example, three‐layered hollow structures .…”

“…Superplastic forming at constant gas pressure can result in the variation of strain rate of the stiffening ribs by several orders of magnitude, leading to violation of the optimal condition of superplasticity. Therefore, the pressure cycle in the superplastic forming process must be chosen so that to satisfy the optimal strain rate condition, and to reduce the forming time .…”