Explanipedia

Limit and Shakedown Analysis of Thin Plates under Random Strength by Probabilistic Constrained Programming Open

Ngọc Trình Trần, Manfred Staat, Hoang An Le · 2025

This work presents a new model for the shakedown analysis of Kirchhoff plates under uncertain conditions of the plastic moment by the direct method. The stochastic models of the plastic moment are normal or lognormal distribution. New form…

The Primary Stability of Arthroscopic Subscapularis Tendon Repair Depends on the Suture Technique: A Biomechanical Evaluation of 4 Different Repair Techniques Open

Julia A. Nacov, Sandra Kammerlohr, Manfred Staat, Eduard Buess, Tim Leschinger , et al. · 2025

Background: Numerous single- and double-row repair techniques with simple and modified stitches have been described for subscapularis tendon tears. Purpose/Hypothesis: This study aimed to uniformly evaluate the influence of 4 different rep…

Plastic Analysis of Truss Structures under Random Strength by Chance Constrained Programming Open

T. Tran Ngoc, Manfred Staat · 2024

FEM shakedown analysis of structures under random strength with chance constrained programming Open

Ngọc Trình Trần, Tu Luc Trinh, Dao Ngọc Tien, Tan Giap Van, Khuyen Truong Manh , et al. · 2022

Direct methods, comprising limit and shakedown analysis, are a branch of computational mechanics. They play a significant role in mechanical and civil engineering design. The concept of direct methods aims to determine the ultimate load ca…

Layer-Specific Damage Modeling of Porcine Large Intestine under Biaxial Tension Open

Aroj Bhattarai, Charlotte Anabell May, Manfred Staat, Wojciech Kowalczyk, Thanh Ngọc Trần · 2022

The mechanical behavior of the large intestine beyond the ultimate stress has never been investigated. Stretching beyond the ultimate stress may drastically impair the tissue microstructure, which consequently weakens its healthy state fun…

An element‐based formulation for ES‐FEM and FS‐FEM models for implementation in standard solid mechanics finite element codes for 2D and 3D static analysis Open

D. Colombo, Slah Drira, Ralf Frotscher, Manfred Staat · 2022

Edge‐based and face‐based smoothed finite element methods (ES‐FEM and FS‐FEM, respectively) are modified versions of the finite element method allowing to achieve more accurate results and to reduce sensitivity to mesh distortion, at least…

Virgin Passive Colon Biomechanics and a Literature Review of Active Contraction Constitutive Models Open

Aroj Bhattarai, Andreas J. Horbach, Manfred Staat, Wojciech Kowalczyk, Thanh Ngọc Trần · 2022

The objective of this paper is to present our findings on the biomechanical aspects of the virgin passive anisotropic hyperelasticity of the porcine colon based on equibiaxial tensile experiments. Firstly, the characterization of the intes…

Datasets from FEM Simulations done with COMSOL Multiphysics and Code_Aster. Open

Murat Topçu, Spg Madabhushi, Manfred Staat · 2022

Datasets from FEM Simulations done with COMSOL Multiphysics and Code_Aster for an elastic stress transfer between matrix and fibres having a variable radius.

Datasets from FEM Simulations done with COMSOL Multiphysics Open

Murat Topçu, Spg Madabhushi, Manfred Staat · 2022

Datasets from FEM Simulations done with COMSOL Multiphysics for an elastic stress transfer between matrix and fibres having a variable radius

An Extension Strain Type Mohr–Coulomb Criterion Open

Manfred Staat · 2021

FEM SHAKEDOWN ANALYSIS OF KIRCHOFF-LOVE PLATES UNDER UNCERTAINTY OF STRENGTH Open

Ngọc Trình Trần, Manfred Staat · 2021

A new formulation to calculate the shakedown limit load of Kirchhoff plates under stochastic conditions of strength is developed.Direct structural reliability design by chance constrained programming is based on the prescribed failure prob…

Biomechanical in vitro examination of a standardized low-volume tubular femoroplasty Open

Andreas J. Horbach, Manfred Staat, Daniel Pérez-Viana, Hans‐Peter Simmen, Valentin Neuhaus , et al. · 2020

Modeling and simulation of human induced pluripotent stem cell‐derived cardiac tissue Open

Alexander Jung, Manfred Staat · 2020

In the discussion section of Jung

Combining Physiological Relevance and Throughput for in vitro Cardiac Contractility Measurement Open

Ronald J. Knox, Andrea Brüggemann, Matthias Goßmann, Ulrich Thomas, András Horváth , et al. · 2020

Comparison of forces acting on maxillary incisors during tracheal intubation with different laryngoscopy techniques: a blinded manikin study Open

Mark Schieren, J Kleinschmidt, Axel Schmutz, Torsten Loop, Manfred Staat , et al. · 2019

Summary Dental trauma is a common complication of tracheal intubation. As existing evidence is insufficient to validly assess the impact of different laryngoscopy techniques on the incidence of dental trauma, the force exerted onto dental …

Irreparable Rotator Cuff Tears: A Biomechanical Comparison of Superior Capsuloligamentous Complex Reconstruction Techniques and an Interpositional Graft Technique Open

Tim Leschinger, Katharina Besch, Cansu Aydın Altuntaş, Manfred Staat, Martin Scaal , et al. · 2019

Background: Irreparable rotator cuff tears lead to superior translation of the humeral head. Numerous surgical management options are available to treat the condition. Purpose: To compare superior capsule stability among different types of…

Kyphoplasty of Osteoporotic Fractured Vertebrae: A Finite Element Analysis about Two Types of Cement Open

Carolin Meyer, Kerstin van Gaalen, Tim Leschinger, Max J. Scheyerer, Wolfram F. Neiss , et al. · 2019

If conservative treatment of osteoporotic vertebral compression fractures fails, vertebro- or kyphoplasty is indicated. Usually, polymethylmethacrylate cement (PMMA) is applied coming along with many disadvantageous features. Aluminum-free…

The 3rd YRA MedTech Symposium 2019 Open

Manfred Staat, Daniel Erni · 2019

ISBN 978-3-940402-22-6

A musculoskeletal shoulder simulation of moment arms and joint reaction forces after medialization of the supraspinatus footprint in rotator cuff repair Open

Tim Leschinger, Stefan Birgel, Michael Hackl, Manfred Staat, Lars Peter Müller , et al. · 2019

A non-anatomical reinsertion of the supraspinatus medially to the original footprint to avoid over-tensioning of the tendon in large and retracted tears is one surgical option in rotator cuff (RC) repair. The purpose of the study was to de…

Computational comparison of different textile implants to correct apical prolapse in females Open

Aroj Bhattarai, Manfred Staat · 2018

Prosthetic textile implants of different shapes, sizes and polymers are used to correct the apical prolapse after hysterectomy (removal of the uterus). The selection of the implant before or during minimally invasive surgery depends on the…

Optical strain measurement for the modeling of surgical meshes and their porosity Open

Andreas J. Horbach, Manfred Staat · 2018

The porosity of surgical meshes makes them flexible for large elastic deformation and establishes the healing conditions of good tissue in growth. The biomechanic modeling of orthotropic and compressible materials requires new materials mo…

Frontmatter Open

Claudia Anzeigenverantwortlicher, Franz Druck, Jörg Himmel, Daniel Erni, Alice Fischerauer , et al. · 2018

tm -Technisches MessenPlattform für Methoden, Systeme und Anwendungen in der Messtechnik.Organ des AHMT (Arbeitskreis der Hochschullehrer für Messtechnik e.V.), der AMA (Verband für Sensorik und Messtechnik e.V.) und der NAMUR (

Modelling of Soft Connective Tissues to Investigate Female Pelvic Floor Dysfunctions Open

Aroj Bhattarai, Manfred Staat · 2018

After menopause, decreased levels of estrogen and progesterone remodel the collagen of the soft tissues thereby reducing their stiffness. Stress urinary incontinence is associated with involuntary urine leakage due to pathological movement…

Biomechanical modeling of macular hole formation and development Open

Anissa Frank, Alexander Jung, Manfred Staat, Michael Engelbert, Alexey Dashevsky , et al. · 2017

FEM Shakedown of uncertain structures by chance constrained programming Open

Ngọc Trình Trần, Thanh Ngọc Trần, Hermann G. Matthies, Georgios Ε. Stavroulakis, Manfred Staat · 2016

We present a new primal‐dual numerical algorithm of the shakedown problem under uncertainty in which the material strength is considered as a normally distributed random variable. Using chance constrained programming, we obtain determinist…

SHAKEDOWN ANALYSIS OF PLATE BENDING UNDER STOCHASTIC UNCERTAINTY BY CHANCE CONSTRAINED PROGRAMMING Open

Ngọc Trình Trần, Thanh Ngọc Trần, Hermann G. Matthies, Georgios Ε. Stavroulakis, Manfred Staat · 2016

In this paper we propose a stochastic programming to analyze limit and shakedown of plate bending under uncertainty conditions of strength.The Kirchhoff plate theory is used to formulate chance constrained problems.Based on the duality the…

A 3D ELECTROMECHANICAL FEM-BASED MODEL FOR CARDIAC TISSUE Open

Minh Tuấn Dương, Alexander Jung, Ralf Frotscher, Manfred Staat · 2016

The CellDrum provides an experimental setup to investigate the electromechanics of a cardiac tissue construct and particularly the effect of drugs.Experimental data can be used to parametrize and validate computational electromechanical mo…

Mechano-Pharmacological Characterization of Cardiomyocytes Derived from Human Induced Pluripotent Stem Cells Open

Matthias Goßmann, Ralf Frotscher, Peter Linder, Stephan Neumann, Robin Bayer , et al. · 2016

Background/Aims: Common systems for the quantification of cellular contraction rely on animal-based models, complex experimental setups or indirect approaches. The herein presented CellDrum technology for testing mechanical tension of cell…

Physical response of hyperelastic models for composite materials and soft tissues Open

Minh Tuấn Dương, Nhu Nguyen, Manfred Staat · 2015

A hyperelastic model must not only characterize the mechanical response of a composite material such as soft tissue, but also ensure numerical stability by a feasible set of material parameters. Apart from the well-known ill-conditioning p…

Influence of refrigerated storage on tensile mechanical properties of porcine liver and spleen Open

Minh Tuấn Dương, Huynh Nhu Nguyễn, T. Ngọc Trần, René H. Tolba, Manfred Staat · 2015

Preservation conditions may affect internal organs thus influencing the results of protracted biomechanical tests. The influence of the freeze–thaw cycle on the mechanical behaviour of porcine abdominal organs was reported in our previous …

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