Manuela Sander
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View article: Validation and Investigation of a Multiaxial Progressive Damage Model Through Glass Fiber Reinforced Tube Specimen Under Fatigue Loading
Validation and Investigation of a Multiaxial Progressive Damage Model Through Glass Fiber Reinforced Tube Specimen Under Fatigue Loading Open
In the field of composite structure fatigue simulations, progressive damage models are common tools. However, these models are dependent on the definition of meta parameters, such as the residual stiffness following an interfiber failure m…
View article: Investigation of Fatigue of Glass Fiber–Reinforced Plastic Tubes Under Multiaxial In‐Phase and Out‐Of‐Phase Loading
Investigation of Fatigue of Glass Fiber–Reinforced Plastic Tubes Under Multiaxial In‐Phase and Out‐Of‐Phase Loading Open
In order to investigate fatigue in fiber‐reinforced plastics under in‐phase and out‐of‐phase multiaxial loading conditions, tube specimens were designed and tested. Initially, tension–compression and torsional moments were individually app…
View article: Reduction of fluid noise in modern aircraft hydraulics by integrated broadband attenuators
Reduction of fluid noise in modern aircraft hydraulics by integrated broadband attenuators Open
New axial piston pumps with fixed displacement volumes, such as the high efficient power package (HEPP) pumps operate at variable rotational speeds and thus variable flow rates in a wide range. Using intelligent pump control systems, small…
View article: Fatigue Crack Segmentation and Characterization of Additively Manufactured Ti‐6Al‐4V Using X‐Ray Computed Tomography
Fatigue Crack Segmentation and Characterization of Additively Manufactured Ti‐6Al‐4V Using X‐Ray Computed Tomography Open
X‐ray computed tomography (XCT) is extremely useful for the non‐destructive analysis of additively manufactured (AM) components. AM components often show manufacturing defects such as lack‐of‐fusion (LoF), which are detrimental to the fati…
View article: Influence of artificial seawater on the VHCF behavior of different steels
Influence of artificial seawater on the VHCF behavior of different steels Open
The fatigue properties of a high‐strength steel, a structural steel, and a duplex stainless steel in artificial seawater were investigated. Consequently, a test chamber for the existing ultrasonic test stand was implemented. The experiment…
View article: Investigation of the Influence of Osteoporosis and Aging on Periprosthetic Femoral Fractures using Finite Element Analyses
Investigation of the Influence of Osteoporosis and Aging on Periprosthetic Femoral Fractures using Finite Element Analyses Open
With the increasing life expectancy and more active lifestyles of patients, the number of total hip replacements is constantly rising. Consequently, the incidence of periprosthetic femoral fractures (PFF) is also growing and facilitated by…
View article: Image-based and in-situ measurement techniques for the characterization of the damage behavior of additively manufactured lattice structures under fatigue loading
Image-based and in-situ measurement techniques for the characterization of the damage behavior of additively manufactured lattice structures under fatigue loading Open
For a safe application of additively manufactured (AM) lattice structures in e.g. load-bearing implants, a comprehensive understanding of fatigue processes is required. With additional systematic investigations of the underlying fatigue be…
View article: Automated crack length measurement for mixed mode fatigue cracks using digital image correlation
Automated crack length measurement for mixed mode fatigue cracks using digital image correlation Open
It is well known that mode II leads to a kinking and mode III to a twisting of a fatigue crack. On the surfaces of an SEN specimen, an overlapping of these two crack loading modes occurs. Superimposed with mode I, this results in very comp…
View article: An investigation of the residual stiffness of a glass fibre reinforced composite in high cycle fatigue experiments
An investigation of the residual stiffness of a glass fibre reinforced composite in high cycle fatigue experiments Open
A modern wind turbine is designed to operate 20 to 25 years under various loading conditions. In operation, the current degradation and damage states of the turbine's rotor blades are unknown and structural reserves for further years of op…
View article: Morphological and mechanical characterisation of three-dimensional gyroid structures fabricated by electron beam melting for the use as a porous biomaterial
Morphological and mechanical characterisation of three-dimensional gyroid structures fabricated by electron beam melting for the use as a porous biomaterial Open
Additive manufactured porous biomaterials based on triply periodic minimal surfaces (TPMS) are a highly discussed topic in the literature. With their unique properties in terms of open porosity, large surface area and surface curvature, th…
View article: Internal Crack Initiation and Growth Starting from Artificially Generated Defects in Additively Manufactured Ti6Al4V Specimen in the VHCF Regime
Internal Crack Initiation and Growth Starting from Artificially Generated Defects in Additively Manufactured Ti6Al4V Specimen in the VHCF Regime Open
The aim of the present work was to investigate the ‘fine granular area’ (FGA) formation based on artificially generated internal defects in additively manufactured Ti6Al4V specimens in the early stage of fatigue crack growth in the ‘very h…
View article: Determination of the Crack Propagation Direction in Mixed-Mode Missions due to Cyclic Loading
Determination of the Crack Propagation Direction in Mixed-Mode Missions due to Cyclic Loading Open
The evaluation of cyclic crack propagation due to missions with varying mixed-mode conditions is an important topic in industrial applications. This paper focuses on the determination of the resulting propagation direction. Two criteria ar…
View article: Influence of structure-determining parameters on the mechanical properties and damage behavior of electron beam melted lattice structures under quasi-static and fatigue compression loading
Influence of structure-determining parameters on the mechanical properties and damage behavior of electron beam melted lattice structures under quasi-static and fatigue compression loading Open
The topology-property relationship of porous structures, especially tested under quasi-static and cyclic loadings, is an essential factor for the design and safe application of porous structures in the medical context. Within the scope of …
View article: Monotonic and Fatigue Behavior of EBM Manufactured Ti-6Al-4V Solid Samples: Experimental, Analytical and Numerical Investigations
Monotonic and Fatigue Behavior of EBM Manufactured Ti-6Al-4V Solid Samples: Experimental, Analytical and Numerical Investigations Open
The present study aims to carry out an experimental, analytical and numerical investigation of the monotonic and fatigue performance of electron beam melted Ti-6Al-4V structures. Therefore, tensile tests, multiple step tests and strain-lif…
View article: Experimental and Numerical Investigation of the Fracture Behavior of Welded Aluminum Cross Joints under Axial Compression
Experimental and Numerical Investigation of the Fracture Behavior of Welded Aluminum Cross Joints under Axial Compression Open
In age-hardened high-strength aluminum alloys, the area with and around a joint has a large impact on the load-bearing capacity of a welded structure. Therefore, in this study the fracture behavior of welded EN AW 6082 T6 plates is investi…
View article: Alterations in the mechanical, chemical and biocompatibility properties of low-cost polyethylene and polyester meshes after steam sterilization
Alterations in the mechanical, chemical and biocompatibility properties of low-cost polyethylene and polyester meshes after steam sterilization Open
Introduction In Africa and other Low Resource Settings (LRS), the guideline-based and thus in most cases mesh-based treatment of inguinal hernias is only feasible to a very limited extent. This has led to an increased use of low cost meshe…
View article: Numerical and experimental investigations of additively manufactured lattice structures under quasi‐static compression loading
Numerical and experimental investigations of additively manufactured lattice structures under quasi‐static compression loading Open
Investigating the mechanical behavior is an important point for evaluating the mechanical reliability of additively manufactured (AM) lattice structures. First, the lattice structures were experimentally tested under compression loading. I…
View article: Investigation of mixed mode fatigue crack propagation in SEN-specimen under in-phase and out-of-phase conditions due to tension-compression and torsional loading
Investigation of mixed mode fatigue crack propagation in SEN-specimen under in-phase and out-of-phase conditions due to tension-compression and torsional loading Open
Numerous cases of damage by fatigue in structures are related to mechanical stresses due to mixed mode loading conditions. To prevent such cases of failure a precise knowledge of the corresponding theoretical background is indispensable. U…
View article: Combined Calorimetry, Thermo-Mechanical Analysis and Tensile Test on Welded EN AW-6082 Joints
Combined Calorimetry, Thermo-Mechanical Analysis and Tensile Test on Welded EN AW-6082 Joints Open
Wide softening zones are typical for welded joints of age hardened aluminium alloys. In this study, the microstructure evolution and distribution of mechanical properties resulting from welding processes of the aluminium alloy EN AW-6082 (…
View article: Influence of Solution-Annealing Parameters on the Continuous Cooling Precipitation of Aluminum Alloy 6082
Influence of Solution-Annealing Parameters on the Continuous Cooling Precipitation of Aluminum Alloy 6082 Open
We use a systematic approach to investigate the influence of the specific solution condition on quench-induced precipitation of coarse secondary phase particles during subsequent cooling for a wide range of cooling rates. Commercially prod…
View article: Numerical studies of the residual lifetime of power plant components based on experimental results at elevated temperatures
Numerical studies of the residual lifetime of power plant components based on experimental results at elevated temperatures Open
In the future, the energy supply will strongly fluctuate, which results in more frequently load cycles. For this reason, it is necessary to analyze fatigue crack growth under the aspect of reasonable load cases in relevant power plant comp…
View article: Investigations on crack propagation in wheelset axles under rotating bending and mixed mode loading
Investigations on crack propagation in wheelset axles under rotating bending and mixed mode loading Open
Failures in wheelset axles can lead to catastrophic consequences. In order to prevent unexpected failures, inspection intervals must be defined based on fracture mechanical approaches. For the railway axle steel 34CrNiMo6 fatigue crack gro…
View article: Experimental analysis of insertion torques and forces of threaded and press-fit acetabular cups by means of ex vivo and in vivo measurements
Experimental analysis of insertion torques and forces of threaded and press-fit acetabular cups by means of ex vivo and in vivo measurements Open
Implantation behaviour was influenced by acetabular cup design, bone substitute and experience of the surgeon. No specific density of bone substitute could be favoured for ex vivo investigations on the implantation behaviour of acetabular …
View article: Finding the ideal strategy: Full-scale fatigue testing of wind turbine rotor shafts
Finding the ideal strategy: Full-scale fatigue testing of wind turbine rotor shafts Open
For the purpose of a light weight design of rotor shafts, fatigue testing is necessary. Since full-scale fatigue tests of these large components are time consuming, costly and have not been done before, much effort has to be put into the i…
View article: Fatigue life on a full scale test rig: Forged versus cast wind turbine rotor shafts
Fatigue life on a full scale test rig: Forged versus cast wind turbine rotor shafts Open
To reduce uncertainties associated with the fatigue life of the highly safety relevant rotor shaft and also to review today's design practice, the fatigue behaviour will be tested on a full scale test rig. Until now tests on full scale win…
View article: Effect of Specimen Geometry and Press-Fit on the Stress Intensity Factor Solution for Scaled Wheelset Axles under Bending
Effect of Specimen Geometry and Press-Fit on the Stress Intensity Factor Solution for Scaled Wheelset Axles under Bending Open
One problem in wheelset axles are the failures due to the propagation of fatigue cracks. To avoid those failures with sometimes catastrophic consequences analytical crack propagation simulations are used. For these simulations the knowledg…
View article: Fatigue and fracture mechanical behaviour of a wind turbine rotor shaft made of cast iron and forged steel
Fatigue and fracture mechanical behaviour of a wind turbine rotor shaft made of cast iron and forged steel Open
To reduce uncertainties associated with the fatigue behaviour of the highly safety relevant wind turbine rotor shaft and also to review today's design practice the fatigue life time is tested on a full scale test rig. Further investigation…
View article: Experimental and numerical investigation of fracture in fillet welds by cross joint specimens
Experimental and numerical investigation of fracture in fillet welds by cross joint specimens Open
The load capacity of fillet welds is investigated experimentally and numerically in cross joint specimens with the objective of calibrating multiple failure criteria for the ductile fracture of weld metal. The cross joint specimens are com…
View article: Fretting fatigue induced surface cracks under shrink fitted main bearings in wind turbine rotor shafts
Fretting fatigue induced surface cracks under shrink fitted main bearings in wind turbine rotor shafts Open
This paper deals with the phenomenon of fretting fatigue on the rotor shaft of a wind turbine at the shrink fit of the main bearing. The sensitivity of the rotor shaft for growing cracks that nucleate at the bearing seat is investigated an…
View article: Investigation of fatigue crack growth in a power plant steel under elevated temperatures
Investigation of fatigue crack growth in a power plant steel under elevated temperatures Open
The definition of inspection intervals on the basis of fracture mechanics requires beside the knowledge of the load e.g. in terms of stress intensity solutions also the knowledge of the material parameters e.g. in terms of crack growth dat…