20.500.12556/RUL-175237 Development and fabrication of an auxetic composite with the shape memory effect for the regeneration of damaged parts The purpose of the article is to present a design of an active composite cellular structure, which consists of two different materials. A flexible polymer matrix is moulded around a pre-braided wire reinforcement, which is made of a high-strength shape memory material NiTi SMA. The composite is formed in a special mould, which enables manufacturing of cellular auxetic specimens. Since the reinforcements are made from the shape memory alloy, this enables temperature activation of the interwoven reinforcement wires to restore the deformed shape. In addition, such a structure can be deformed according to a precisely defined Poisson's ratio. To design this structure, a special finite-element approach was also developed, which enables simulating the response of a super-elastic material with a shape memory effect. The effectiveness of this finite-element approach was verified by experimental testing of the sample specimen that actually deforms according to the desired negative Poisson's ratio. The experimental results confirmed the regeneration ability of the newly developed cellular composite structure. Namen prispevka je prikaz razvoja in izdelave aktivne kompozitne celične strukture, ki je sestavljena iz dveh povsem različnih materialov. Okoli predhodno spletene žične armature, izdelane iz visoko-trdnostnega materiala z oblikovnim spominom SMA, je ulit fleksibilni polimer, ki predstavlja matrico strukture. Sestav kompozita je oblikovan v kalupu, ki tvori še avksetično celično obliko notranjih vzorcev. Ker je armatura sestavljena iz zlitine NiTi SMA z oblikovnim spominom, to omogoča temperaturno aktivacijo mreže spletenih žic in posledično možnost izvedbe deformacij sestava strukture po točno določenem Poissonovem razmerju. Za potrebe učinkovitega načrtovanja je bil razvit tudi poseben MKE pristop, ki omogoča simulacijo odziva superelastičnega materiala s spominskim efektom. Učinkovitost novega MKE pristopa je bila preverjena z eksperimentalnim testom odzivanja vzorca, ki se dejansko deformira po želenem negativnem Poissonovem razmerju. Prav tako je z eksperimentalnim testom potrjeno regenerativno obnašanje novo razvitega celičnega kompozita. ordered porosity auxetic properties negative Poisson's ratio cellular structure NiTi SMA shape memory effect urejena poroznost avksetičnost negativno Poissonovo razmerje celična struktura oblikovni spomin materiala true false true Angleški jezik Slovenski jezik Članek v reviji 2025-10-22 14:30:40 2025-10-22 14:30:44 2026-06-13 04:29:36 0000-00-00 00:00:00 2026 0 0 13 str. Vol. 309, art. 113034 Jan. 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.168:539.217 1359-8368 10.1016/j.compositesb.2025.113034 254324483 1-s2.0-S135983682500945X-main.pdf 1-s2.0-S135983682500945X-main.pdf 1 F773A40B961628D27C4100DE55225FA0 852cf88c16336c14269e7810403a12c1f61d87d7b83209d47286137d808c3b91 6fbc9cb7-6644-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=235457 Tomazincic_Razvoj_in_izdelava.pdf Tomazincic_Razvoj_in_izdelava.pdf 1 C01A323D00899D5FD0E7846B478BEDD8 70f0a405e9e54d8b6a5ffcd33642cbe2f7e8fd0f6ac9756a9b0381daf9b1d6da 00142cb4-b30d-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=220957 https://www.sciencedirect.com/science/article/pii/S135983682500945X 1 a56b7f08-af42-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=220577 Fakulteta za strojništvo 0 0 0