"RIV/00216305:26210/07:PU67942!RIV08-MSM-26210___" . "Vliv superponovan\u00E9ho biaxi\u00E1ln\u00EDho nap\u011Bt\u00ED na pevnost v tahu dokonal\u00FDch krystal\u016F z prvn\u00EDch princip\u016F"@cs . . . "024115-24119" . "[5CEE9BED77D1]" . . "426412" . "Vliv superponovan\u00E9ho biaxi\u00E1ln\u00EDho nap\u011Bt\u00ED na pevnost v tahu dokonal\u00FDch krystal\u016F z prvn\u00EDch princip\u016F"@cs . . . . "26210" . "P(OC 148)" . "tensile strength, biaxial stress, ab initio calculations, stress coupling"@en . "Influence of biaxial stresses applied perpendicularly to the [100] loading axis on the theoretical tensile strength is studied from first principles. Ten crystals of cubic metals and three crystals of diamond ceramics were selected as particular case studies. Obtained results show that, within a limited range of biaxial stresses, the tensile strength monotonously increases with increasing biaxial tensile stress for most of the studied metals. Within the range, the dependence can be approximated by a linear function. Beyond the range, the dependence shows a maximum that appears usually in tensile range of biaxial stresses. On the other hand, some of the materials (Si, Ni, Cu, and Ge) exhibit maximum tensile strength at nearly uniaxial stress state and the superposition of both tensile and compressive biaxial stresses reduces the tensile strength. Unlike the other crystals, diamond revealed the maximum under compressive biaxial stress."@en . . "2" . "Influence of superimposed biaxial stress on the tensile strength of perfect crystals from first principles"@en . "Influence of superimposed biaxial stress on the tensile strength of perfect crystals from first principles" . "5"^^ . . . "PHYSICAL REVIEW B" . "Influence of biaxial stresses applied perpendicularly to the [100] loading axis on the theoretical tensile strength is studied from first principles. Ten crystals of cubic metals and three crystals of diamond ceramics were selected as particular case studies. Obtained results show that, within a limited range of biaxial stresses, the tensile strength monotonously increases with increasing biaxial tensile stress for most of the studied metals. Within the range, the dependence can be approximated by a linear function. Beyond the range, the dependence shows a maximum that appears usually in tensile range of biaxial stresses. On the other hand, some of the materials (Si, Ni, Cu, and Ge) exhibit maximum tensile strength at nearly uniaxial stress state and the superposition of both tensile and compressive biaxial stresses reduces the tensile strength. Unlike the other crystals, diamond revealed the maximum under compressive biaxial stress." . . . "2"^^ . . "2"^^ . "1098-0121" . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . . "\u010Cern\u00FD, Miroslav" . "Pokluda, Jaroslav" . "Influence of superimposed biaxial stress on the tensile strength of perfect crystals from first principles"@en . . . . "Vliv biaxi\u00E1ln\u00EDho nap\u011Bt\u00ED aplikovan\u00E9ho kolmo k [100] ose zat\u00ED\u017Een\u00ED na teoretickou pevnost v tahu je studov\u00E1na z prvn\u00EDch princip\u016F. Deset krystal\u016F kubick\u00FDch kov\u016F a t\u0159i krystaly diamantov\u00FDch keramik byly vybr\u00E1ny jako p\u0159edm\u011Bt studia. Z\u00EDskan\u00E9 v\u00FDsledky ukazuj\u00ED, \u017Ee v r\u00E1mci omezen\u00E9ho rozsahu biaxi\u00E1ln\u00EDch nap\u011Bt\u00ED pevnost v tahu monoton\u011B roste s nar\u016Fstaj\u00EDc\u00EDm biaxi\u00E1ln\u00EDm tahov\u00FDm nap\u011Bt\u00EDm pro v\u011Bt\u0161inu studovan\u00FDch kov\u016F. V r\u00E1mci tohoto rozsahu lze z\u00E1vislost aproximovat line\u00E1rn\u00ED funkc\u00ED. Mimo tento rozsah z\u00E1vislost vykazuje maximum, kter\u00E9 se obvykle objevuje v tahov\u00E9 oblasti biaxi\u00E1ln\u00EDch nap\u011Bt\u00ED. Na druhou stranu, n\u011Bkter\u00E9 materi\u00E1ly (Si, Ni, Cu, a Ge) vykazuj\u00ED maximum tahov\u00E9 pevnosti p\u0159i t\u00E9m\u011B\u0159 jednoos\u00E9m zat\u00ED\u017Een\u00ED a superpozice tahov\u00E9ho i tlakov\u00E9ho biaxi\u00E1ln\u00EDho nap\u011Bt\u00ED sni\u017Euje pevnost v tahu. Narozd\u00EDl od ostatn\u00EDch krystal\u016F, diamant vyk\u00E1zal maximum za tlakov\u00E9ho biaxi\u00E1ln\u00EDho nap\u011Bt\u00ED."@cs . "76" . . "Influence of superimposed biaxial stress on the tensile strength of perfect crystals from first principles" . "RIV/00216305:26210/07:PU67942" .