Article
Engineering, Multidisciplinary
Ru-Xia Ma, Song Cen, Yan Shang, Chen-Feng Li
Summary: This study extends the recent US-ATFH8 element to 3D hyper-elastic finite deformation analysis and demonstrates that the element performs well in nearly incompressible hyper-elastic 3D problems.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2022)
Article
Biophysics
Manuel K. Rausch, Gabriella P. Sugerman, Sotirios Kakaletsis, Berkin Dortdivanlioglu
Summary: Blood clots have dual roles in the body, serving as wound sealants and sources of diseases, with complex mechanics requiring mathematical formulation. A hyper-viscoelastic damage model is fitted to original data to predict blood clot mechanics, with parameters validated against test data and made openly available for further research.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2021)
Article
Polymer Science
Andre F. C. Vieira, Enio H. P. Da Silva, Marcelo L. Ribeiro
Summary: Biodegradable polymers are widely used in various markets, particularly in the field of regenerative medicine. These materials can meet mechanical requirements within a certain time range and then degrade and be naturally absorbed by the human body, making them suitable for producing temporary implants that do not require removal surgery. This study proposes a numerical approach to simulate the mechanical behavior of these polymeric devices during hydrolytic degradation. The approach combines hydrolysis kinetics, erosion, and continuum-based hydrolytic damage to model the decrease in mechanical performance due to molecular weight loss and mass loss in the device.
Review
Mechanics
Qian Guo, Wenjin Yao, Wenbin Li, Nikhil Gupta
Summary: This paper reviews constitutive models used in finite element analysis for assessing the structural performance of composite materials, categorizing them into four groups and discussing their applications. Adaptations to finite element models are necessary for accurate and efficient performance in the complex environments that composites are used in. Recent years have seen progressive development in finite element models for composite materials.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Behrouz Arash, Wibke Exner, Raimund Rolfes
Summary: A finite deformation phase-field fracture model was developed to analyze the thermo-viscoelastic behavior of boehmite nanoparticle/epoxy nanocomposites, considering rate-dependent fracture evolution and the effect of nanoparticle contents and temperature on fracture behavior. The model's predictive capability was validated through comparing numerical results with experimental data, and numerical simulations were performed to study the effect of temperature and deformation rate on the force-displacement response of the nanocomposites in compact-tension tests.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Mechanics
Guanhua Xu, Kaifu Zhang, Hui Cheng, Bin Luo, Peng Zou, Biao Liang
Summary: The physically-based model developed predicts interface damage during the installation process of composite joints. The model utilizes physically-based failure criteria and considers in-situ strength effects and fiber kinking for damage initiation, while adopting a cost-effective algorithm for improved calculation efficiency.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
John Susainathan, Enrique Barbero, Sonia Sanchez-Saez, Arthur Cantarel, Florent Eyma
Summary: An explicit numerical model is developed to study the impact behavior of a new composite eco-structure. The model accurately predicts the stiffness degradation and damage of wooden plies by simulating the elastic response and incorporating a stress-based modified Hashin-3D damage model. Validation with experimental results shows a good agreement and higher accuracy.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Aerospace
Sasa Gao, Zhengtao Qu, Yunjie Zhang, Zizhao Zhao, Biao Liang
Summary: An efficient hyper-elastic model was developed to reflect the mechanical behaviors of Carbon-Kevlar hybrid woven reinforcement. The model accurately captures shear angle distribution, geometry shape, force-displacement curve, and potential fiber tensile failure.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Materials Science, Multidisciplinary
Shank S. Kulkarni, Kyoo Sil Choi, Nalini Menon, Kevin Simmons
Summary: Green hydrogen is emerging as a promising alternative to fossil fuels, but its use requires high-pressure storage which can cause mechanical failure in polymer components. This paper develops a model to predict the damage caused by rapid decompression failure in polymers when hydrogen diffuses and gets trapped in existing cavities. The study explores the effects of diffusion coefficient, cavity size and location, hydrogen pressure, and depressurization rate on damage initiation, and also investigates the impact of fillers and plasticizers on the damage evolution.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Materials Science, Composites
Yutong Fu, Xuefeng Yao
Summary: The research explores the designing and fabrication of continuous fiber reinforced thermoplastic composites through additive manufacturing technology. It simulates the manufacturing process and mechanical properties, providing insights for the design and evaluation of 3D printed CFRTPCs. The study offers a theoretical basis and simulation method for predicting the mechanical properties of 3D printed CFRTPCs.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Sha Xu, Hao Chen, Yali Yang, Shengwei Zhang, Jie Shen, Yongfang Li, Kun Gao
Summary: A method using XCT measurement and finite element model analysis was proposed in this paper to predict the dynamic distribution and evolution of 3D voids/cracks in engineering materials, as well as to estimate low-cycle fatigue damage. The numerical prediction method was consistent with experimental results.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Composites
Yutong Fu, Yan Kan, Xin Fan, Shanyong Xuan, Xuefeng Yao
Summary: This paper investigates the design strategy and mechanical properties of 3D printed continuous fiber reinforced thermoplastic fabric composites (CFRTPFCs). Simulation of manufacturing processes and analysis of mechanical properties using a multi-scale fluid-solid coupling method are performed. The effects of length-width ratio and printing method on the mechanical behaviors of the composites are discussed.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Weiwei Yu, Jie Chen, Weiwei Ming, Qinglong An, Ming Chen
Summary: The study focused on the removal mechanism and damage behavior during the machining of ceramic particle-reinforced metal matrix composites. A finite element model was established to comprehensively consider the distribution and shape of particles, with corresponding experiments validating the reliability of the model. Results showed that chips were easy to separate where particles gathered, and stress concentration was serious at the edges and corners of particles. Cutting and thrust force, subsurface damage, surface roughness, and maximum profile peak-valley height increased with depth of cut.
CERAMICS INTERNATIONAL
(2021)
Article
Mechanics
Behrouz Arash, Robin Unger, Wibke Exner, Raimund Rolfes
Summary: This study presents the development and numerical implementation of a finite deformation gradient-enhanced damage model for boehmite nanoparticle/epoxy nanocomposites, with parameters identification of the nonlocal constitutive description based on molecular simulations and experimental tests. The nonlocal constitutive model integrated into a nonlinear FE analysis is validated by comparing numerical results with experimental data, confirming the predictive capability of the modeling framework.
COMPOSITE STRUCTURES
(2021)
Article
Polymer Science
Xiulong Yao, Zepeng Wang, Lianxiang Ma, Zhanli Miao, Minglong Su, Xiaoying Han, Jian Yang
Summary: This paper investigates the effects of temperature and filler on the hyper-elastic behavior of reinforced rubbers and proposes a temperature-dependent constitutive model to describe the stress-strain response of filled rubber. The experimental results show that the model can effectively characterize the behavior of filled rubber at different temperatures, indicating its high application value.
Article
Chemistry, Physical
Ba Nghiep Nguyen, Hee Seok Roh, Daniel R. Merkel, Kevin L. Simmons
Summary: This paper presents a predictive modeling tool for damage analysis and design of hydrogen (H-2) storage composite pressure vessels, integrating micromechanics and continuum damage mechanics, as well as 3D finite element modeling. The implementation of integrated multi-scale modeling enables damage analysis and design functionalities.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Mechanics
Shank S. Kulkarni, Varun Gupta, Angel Ortiz, Hrishikesh Das, Piyush Upadhyay, Erin Barker, Darrell Herling
Summary: Predicting the structural performance of a joint requires mechanical characterization of the joint interface, which can be done effectively using the cohesive-zone model (CZM). The CZM relates the traction at the interface to the separation displacement of the two surfaces in the context of a welded joint. Experimental and finite element modeling can be combined to determine the cohesive law parameters for mechanically characterizing the interface obtained in friction stir welded joints.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Engineering, Manufacturing
Shank S. Kulkarni, Timothy Truster, Hrishikesh Das, Varun Gupta, Ayoub Soulami, Piyush Upadhyay, Darrel Herling
Summary: The friction stir welding (FSW) process has shown promising results in joining dissimilar metals. Through a parametric study of joint performance, it was found that grain size has little effect on the joint performance, while interface fracture toughness and strength play a significant role.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2021)
Article
Materials Science, Multidisciplinary
Shank S. Kulkarni, Varun Gupta, David Senor, Timothy Truster, Ayoub Soulami, Ram Devanathan
Summary: This study presents a microstructure-based finite element model to predict the stress-strain response of Zircaloy containing hydrides, considering the effect of hydride formation on mechanical properties. Parametric study and experimental validation show that the volume fraction, orientation, and lamellae width of the hydride phase significantly influence the overall material properties.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Shank S. Kulkarni, Hrishikesh Das, Daniel Ramirez Tamayo, Xiaolong Ma, Tianhao Wang, Dalong Zhang, Piyush Upadhyay, Kyoo Sil Choi, Ayoub Soulami, Darrell Herling
Summary: In this study, the friction stir-assisted scribe technique was used to achieve a viable joint between AZ31 magnesium alloy and uncoated DP590 steel. The mechanical properties and performance of the joint were investigated, and it was found that the joint strength is attributed to mechanical interlocking due to hook feature and metallurgical bonding of two materials at their interface. Energy disperse x-ray spectroscopy analysis further revealed the formation of complex aluminum oxides at the interface.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Engineering, Manufacturing
Yao Qiao, Daniel R. Merkel, Ethan K. Nickerson, Yongsoon Shin, Robert J. Seffens, Angel Ortiz, Kevin L. Simmons
Summary: Understanding the adhesive and interfacial fracture is crucial for improving adhesive performance in bi-material joints. This study compared the fracture energies estimated by conventional methods and the size effect method for different material combinations. The results showed that the size effect method was not influenced by specimen geometry, whereas conventional methods were highly dependent on it. The size effect method allowed objective comparison of interfacial fracture between metal/adhesive and CFRP/adhesive combinations.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Mechanics
Daniel Ramirez-Tamayo, Ayoub Soulami, Varun Gupta, David Restrepo, Arturo Montoya, Ethan Nickerson, Timothy Roosendaal, Kevin Simmons, Gayanesh Petrossian, Harry Millwater
Summary: This paper presents a method for determining constitutive material properties using digital image correlation and load-displacement data. Accurate sensitivities with respect to the unknown parameters are computed using the complex-variable finite element method. The effectiveness of the method is demonstrated through two examples. The use of a weighted residual formulation in the optimization procedure provides better estimates of the constitutive properties, which is important for accurate interfacial properties.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Materials Science, Composites
Yao Qiao, Yongsoon Shin, Madhusudhan R. Pallaka, Ethan K. Nickerson, Daniel R. Merkel, Robert J. Seffens, Angel Ortiz, Jose L. Ramos, Kevin L. Simmons
Summary: This work proposes a method to improve the interfacial bonding between carbon-fiber-reinforced thermo-plastic polymers (CFRTP) and thermoset adhesive. The approach involves surface modification using air plasma, thermal, and step-over distance effects. By exposing carbon fibers on the CFRTP surface through proper heating and treating with air plasma, the bonding between polymer matrix and fibers with the adhesive is enhanced. The study shows that by manipulating the step-over distance and other treatment parameters, the average Mode I specific fracture energy of adhesively-bonded AA5052/CFRP-PA66 dissimilar joints can be improved up to about 410% compared to non-treated joints.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Review
Materials Science, Composites
Yao Qiao, Lisa D. Fring, Madhusudhan R. Pallaka, Kevin L. Simmons
Summary: This paper reviewed the fabrication methods and mechanical behavior of thermoplastic polymer fiber-thermoplastic polymer matrix composites, and pointed out their advantages under various loading conditions. Thermoplastic PPCs with remarkable performance can be achieved through simple methods, but there are still some challenging problems.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Nihal Kanbargi, David Hoskins, Sumit Gupta, Zeyang Yu, Yongsoon Shin, Yao Qiao, Daniel R. Merkel, Christopher C. Bowland, Nicole Labbe, Kevin L. Simmons, Amit K. Naskar
Summary: Adhesive bonding of metals is becoming increasingly important for weight reduction and performance improvement in structural applications. In this study, renewable thermoplastic adhesives were developed by blending technical organosolv lignin and acrylonitrile butadiene co-polymer rubber (NBR) for joining steel substrates. The adhesion, viscoelasticity, and surface properties of the adhesive were measured by varying the lignin content and NBR nitrile content. The study found that the interaction between lignin and NBR improved with higher NBR nitrile content and that increasing lignin content led to higher modulus and stiffness but reduced toughness. The highest adhesive strength was achieved with a 60% lignin loading ratio and NBR51. Finite element-based cohesive zone model (CZM) was used to study the failure strength of the adhesively bonded joint. This study highlights the potential of lignin as a valuable building block for adhesives due to its chemical structure, rigidity, and surface energy characteristics.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Shank S. Kulkarni, Kyoo Sil Choi, Nalini Menon, Kevin Simmons
Summary: Green hydrogen is emerging as a promising alternative to fossil fuels, but its use requires high-pressure storage which can cause mechanical failure in polymer components. This paper develops a model to predict the damage caused by rapid decompression failure in polymers when hydrogen diffuses and gets trapped in existing cavities. The study explores the effects of diffusion coefficient, cavity size and location, hydrogen pressure, and depressurization rate on damage initiation, and also investigates the impact of fillers and plasticizers on the damage evolution.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Polymer Science
Shank S. Kulkarni, Yongsoon Shin, Kyoo Sil Choi, Kevin Simmons
Summary: Polymer materials are commonly used as sealing materials and liners in hydrogen storage and transportation infrastructure. However, the diffusion of hydrogen gas through the polymer material during high-pressure exposure can cause blisters or cracking, leading to permanent damage. Experimental and modeling approaches were used to investigate the desorption process, and it was found that the anomaly in the results was caused by blister formation on the polymer surface. Simulations also showed that blister formation can be influenced by factors such as filler particles and cavity size.
Article
Chemistry, Physical
Cheng Hao, Tuan Liu, Wangcheng Liu, Ming-en Fei, Lin Shao, Wenbin Kuang, Kevin L. Simmons, Jinwen Zhang
Summary: In this study, a hydrothermally recyclable epoxy/anhydride thermosetting system with superior mechanical performance and high T-g was developed for CFRP applications. The recycling process at low temperature decomposes the polymer matrix into oligomers without causing significant damage to the carbon fiber. The recycled materials can be used to prepare new CFRPs, providing a framework for the future design of sustainable polymer composites.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)