نتایج جستجو برای: johnson cook equation
تعداد نتایج: 253498 فیلتر نتایج به سال:
Previous studies have reported significant differences in the Johnson-Cook (J-C) parameters of Ti6Al4V alloy. Thus, various serrated chip morphologies, cutting forces, and temperatures are obtained when different constitutive used for numerical simulation analyses, which decreases reliability model. Therefore, it is necessary to investigate analyze errors due J-C parameters. In this study, mech...
Scratch tests are a powerful and inexpensive tool for studying the mechanical properties of materials. The typically applied determining deformation behavior materials serves as quality assessment method measuring adhesion delamination coatings. However, extraction quantitative material parameters using scratch remains highly non-trivial and, contrary to instrumented indentation or tensile test...
This study is the first part of a project that aims to assess and model impact-induced energy release (IIER). The present work investigates failure mode brittle commercial pyrophoric alloy samples during Taylor impact tests. A series ferrocerium specimens were shot against tungsten carbide anvils, with velocities ranging between 60 140 m/s. Total Lagrangian SPH was employed simulate deformation...
George Mtove, Joseph P. Mugasa, Louisa A. Messenger, Robert C. Malima, Peter Mangesho, Franklin Magogo, Mateusz Plucinski, Ramadhan Hashimu, Johnson Matowo, Donald Shepard, Bernard Batengana, Jackie Cook, Basiliana Emidi, Yara Halasa, Robert Kaaya, Aggrey Kihombo, Kimberly A. Lindblade, Geofrey Makenga, Robert Mpangala, Abraham Mwambuli, Ruth Mzava, Abubakary Mziray, George Olang, Richard M. Ox...
A uniaxial high-temperature tensile test of an AA7075 aluminum alloy sheet was conducted using established induction heating system. Five different types specimens were designed to obtain the stress–strain curves at forming temperatures and strain rates so as construct modify Johnson–Cook constitutive model. The stress states numerically simulated ABAQUS finite element software, triaxiality equ...
In order to investigate the characteristics of elliptical ultrasonic vibration cutting TiC particle-reinforced titanium matrix composites, a two-dimensional thermodynamic coupled finite element model was established based on Johnson-Cook intrinsic structure using ABAQUS simulation software, and changes in force, temperature, machined surface shape, particle fragmentation were obtained under tra...
This paper investigates the structure–property relations of thin-walled lattices, characterized by their cross-sections and heights, under dynamic longitudinal compression. These elucidate interactions different geometric features a design on mechanical response, including energy absorption. We proposed combinatorial, key-based system to generate lattice designs used finite element method simul...
The ballistic perforation resistance of 50 mm thick concrete slabs impacted by 20 diameter ogive-nose steel projectiles is investigated experimentally and numerically. Three commercially produced concretes with nominal unconfined compressive strengths 35, 75 110 MPa were used to cast material test specimens slabs. After curing, impact tests carried out determine the limit curve velocity for eac...
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