An　abdominal　aortic　aneurysm　(AAA)　is　an　irreversible　dilation　of　the　abdominal　artery.　Once　an　aneurysm　is　detected　by　doctors,　clinical　intervention　is　usually　recommended.　The　interventions　involve　traditional　open　surgery　repair　and　endovascular　aneurysm　repair　with　a　stent　graft.　Both　types　of　prophylactic　procedures　are　expensive　and　not　without　any　risk　to　the　patient.　It　is　very　difficult　to　balance　the　risk　of　aneurysm　repair　and　the　chance　of　rupture.　The　reason　lies　in　that　the　changing　trend　of　characteristic　physical　quantities　with　the　evolution　of　AAA　and　the　mechanisms　that　give　rise　to　it　are　still　not　completely　clear.　In　this　study,　computational　3D　patient-specific　model　for　investigating　AAA　development　was　established　based　on　computed　tomography　(CT)　images.　Results　showed　that　as　the　aneurysm　evolved,　peak　wall　stress　and　time-averaged　wall　shear　stress　distribution　patterns　changed.　The　expansion　of　AAA　wall　resulted　in　the　increment　of　peak　stress.　The　AAA　wall　compliance　not　only　showed　different　magnitudes　at　different　cross-sections　of　the　aneurismal　body,　but　also　changed　with　the　development　of　the　aneurysm.　Furthermore,　minimum　wall　strength　and　rupture　potential　index　during　the　three　stages　of　AAA　evolution　were　also　investigated　in　detail.　This　study　might　provide　valuable　information　on　how　to　further　explore　the　mechanical　basis　and　the　rupture　potential　during　AAA　evolution,　and　that　it　may　assist　clinical　diagnostic　procedures　and　avoid　the　potential　risk　of　unnecessary　surgical　intervention.