3D printing, surface growth, residual stress, creep, relaxation, photopolymer, relaxation curve

In present paper the stress relaxation and creep in additive produced sample is discussed. The sample is manufactured by by layer-by-layer photopolymerization. The experiment is the compression in two opposite faces. The scheme of experimental facility and measurement method are proposed. Stress relaxation is are plotted. The approximation of creep curve is discussed. The speckle-interferometry technique is used for a creep of load-free faces of the sample during stress relaxation process observation. The ratio between stress relaxation in a photopolymer and creep are obtained.

Bururuev Aleksei Mikhailovich e-mail: alexey@bururuev.ru, Leading Engineer of the Laboratory for Modeling in Mechanics of Solids IPMech RAS, Moscow, Russia.

Kozintsev Viktor Mikhailovich e-mail: kozincev@amil.ru, Candidate of Physics and Mathematics, Senior Researcher, Laboratory of Mechanics and Fracture of Materials and Structures, IPME RAS, Moscow, Russia.

Murashkin Evgenii Valerievich e-mail: murashkin@ipmnet.ru, Candidate of Physics and Mathematics, Senior Researcher, Modeling Laboratory at MDTT IPMeh RAS, Moscow, Russia.

Popov Alexander Leonidovich e-mail: popov@ipmnet.ru, Doctor of Physical and Mathematical Sciences, Professor, Leading Researcher, Laboratory of Mechanics and Fracture of Materials and Structures, IPME RAS, Moscow, Russia.

Chelyubeev Dmitry Anatolyevich e-mail: popov@ipmnet.ru, Junior Researcher, Laboratory of Mechanics and Fracture of Materials and Structures, IPMech RAS, Moscow, Russia.

Chentsov Aleksandr Viktorovich e-mail: chentsov@ipmnet.ru, Candidate of Physical and Mathematical Sciences, Senior Researcher, Mechanics of Technological Processes, Moscow, Russia.

Bychkov Pavel Sergeevich e-mail: bychkov@ipmnet.ru, Junior Researcher, Modeling Laboratory at MDTT, Moscow, Russia.