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Ultrahigh Specific Strength by Bayesian Optimization of Carbon Nanolattices.
Adv Mater
January 2025
Department of Mechanical & Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, M5S 3G8, Canada.
Nanoarchitected materials are at the frontier of metamaterial design and have set the benchmark for mechanical performance in several contemporary applications. However, traditional nanoarchitected designs with conventional topologies exhibit poor stress distributions and induce premature nodal failure. Here, using multi-objective Bayesian optimization and two-photon polymerization, optimized carbon nanolattices with an exceptional specific strength of 2.
View Article and Find Full Text PDFQuasi-static and dynamic compression behavior of stacked pyramidal lattice structures with I-beam struts.
Sci Rep
January 2025
Department of Mechanical and Nuclear Engineering, Khalifa University of Science & Technology, Abu Dhabi, UAE.
This study investigates the quasi-static and dynamic compression performance of a newly designed stacked pyramidal lattice (SPL) structure composed of struts that resemble I-beams. These novel lattice structures are 3D-printed considering three different stacking sequences, and their stiffness, strength, and energy absorption properties are experimentally assessed through low-velocity impact (1.54 m/s) and quasi-static compression tests.
View Article and Find Full Text PDFImpact of procedural and patient-related risks on 1-year outcomes for patients treated with 1-month dual antiplatelet therapy followed by P2Y12 inhibitor monotherapy after biodegradable-polymer drug-eluting stent implantation.
Cardiovasc Interv Ther
January 2025
Department of Internal Medicine, Division of Cardiology, Iwate Medical University, 2-1-1 Idaidori, Yahaba-Cho, Shiwa-Gun, Iwate, 028-3695, Japan.
In clinical practice, the impact of procedural or patient-related risk factors on 1-year clinical outcomes in patients receiving 1-month of dual antiplatelet therapy (DAPT) followed by P2Y12 inhibitor monotherapy after contemporary percutaneous coronary intervention (PCI) remains unclear. Using data from the multi-center REIWA registry which included patients treated with thin-strut biodegradable polymer drug-eluting stent (BP-DES) and 1-month DAPT followed by P2Y12 inhibitor monotherapy, we assessed the primary endpoint (a composite of cardiovascular death, myocardial infarction, definite stent thrombosis, ischemic or hemorrhagic stroke, and major or minor bleeding) in patients with and without procedural (treatment of three vessels, three or more lesions, three or more stents, bifurcation with two stents, long stenting, and target of chronic total occlusion) and patient-related risk factor (renal insufficiency, anemia, peripheral vascular disease, prior or current history of heart failure and advanced age of ≥ 75 years). Among the 1,202 patients who underwent complete revascularization by PCI, 276 (23.
View Article and Find Full Text PDFA Randomized Comparison of Bioheart Sirolimus-Eluting Bioresorbable Scaffold and Everolimus-Eluting Stents: The BIOHEART-II Trial.
JACC Cardiovasc Interv
January 2025
Department of Cardiology, Fu Wai Hospital, National Center for Cardiovascular Diseases of China, Beijing, China. Electronic address:
Background: First-generation bioresorbable scaffolds (BRS) increased risks of stent thrombosis and adverse events. The Bioheart scaffold is a new poly-L-lactic acid-based BRS.
Objectives: This study sought to evaluate the efficacy and safety of the BRS in patients with coronary artery disease.
Enhanced Compressive Mechanical Properties of Bio-Inspired Lattice Metamaterials with Taper Struts.
Materials (Basel)
December 2024
Suzhou XDM 3D Printing Technology Co., Ltd., Suzhou 215000, China.
The stress distribution within the struts of lattice metamaterials is non-uniform under compressive loads, with stress concentrations typically occurring at the node regions. Inspired by bamboo, this study proposes a type of body-centered cubic (BCC) lattice metamaterial with tapered prism struts (BCCT). The compressive behavior, deformation modes, mechanical properties, and failure mechanisms of BCCT lattice metamaterials are systematically analyzed using finite element methods and validated through compression tests.
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