scholarly journals STUDY ON STRENGTH AND PLASTIC DEFORMATION CAPACITY OF COMPOSITE STUB COLUMN UNDER COMPRESSIVE LOADING

1996 ◽  
Vol 61 (480) ◽  
pp. 171-178 ◽  
Author(s):  
Toshiro SUZUKI ◽  
Shojiro MOTOYUI ◽  
Masahiko UCHIYAMA
Keyword(s):  
Plastic Deformation ◽  
Compressive Loading ◽  
Deformation Capacity ◽  
Stub Column

scholarly journals HYSTERETIC CHARACTERISTICS AND PLASTIC DEFORMATION CAPACITY OF UPLIFT YIELDING BASE-PLATES FOR CONTROLLED ROCKING FRAMES

2010 ◽  
Vol 75 (652) ◽  
pp. 1159-1166 ◽  
Author(s):  
Mitsumasa MIDORIKAWA ◽  
Tatsuya HASEGAWA ◽  
Tadashi ISHIHARA ◽  
Tatsuya AZUHATA ◽  
Tetsuhiro ASARI
Keyword(s):  
Plastic Deformation ◽  
Deformation Capacity ◽  
Hysteretic Characteristics ◽  
Base Plates

Correlations between plastic deformation capacity and fragility/characteristic free volume in amorphous alloys

2018 ◽  
Vol 6 (1) ◽  
pp. 015201
Author(s):  
Xiaojin Xu ◽  
Zhilin Long ◽  
Zhihai Ping ◽  
Chaoping Yan ◽  
Wei Chai
Keyword(s):  
Plastic Deformation ◽  
Free Volume ◽  
Amorphous Alloys ◽  
Deformation Capacity

The Influence of Different Stress States on 16MnR Deformation Capacity

2013 ◽  
Vol 716 ◽  
pp. 590-594
Author(s):  
Shi Lei Zhao ◽  
Yi Liang Zhang ◽  
Gong Feng Jiang
Keyword(s):  
Plastic Deformation ◽  
Stress State ◽  
Equivalent Stress ◽  
Great Influence ◽  
Equivalent Strain ◽  
Complex Stress State ◽  
Biaxial Stress ◽  
Deformation Capacity ◽  
Engineering Structures ◽  
Stress States

16MnR is the typical material of pressure equipment which worked under complex stress state in engineering application. In order to be close to the actual combined tension-shearing stress state and explore the relationship of deformation capacity and different stress state, many groups of combined tension-torsion tests on 16MnR specimens were designed and the equivalent stress-strain relation under different stress state was obtained. The concept of stress triaxiaty (TS value) was cited to characterize the different stress state and the result showed different stress states have a great influence on the material plastic deformation capacity, TS value turns larger, the plastic deformation weakened; 16MnR has a strongest plastic deformation capacity in pure torsion; the level of tensile stress had no significant effect on the maximum stress in the biaxial stress state, but has a significant inverse relationship with the maximum equivalent strain .At last, the mathematical relationship between maximum equivalent-strain and stress triaxiaty could be found. If the stress state of one point in the engineering structures is certain, the maximum equivalent-strain can be estimated.

scholarly journals Ductility and Seismic Suitability of Locally Sourced High Yield Rebars in Benin City

2020 ◽  
Vol 4 (2) ◽  
pp. 458-462
Author(s):  
E. Nwankwo ◽  
E. Attama
Keyword(s):  
Plastic Deformation ◽  
Strain Hardening ◽  
Tensile Force ◽  
Tensile Tests ◽  
High Yield ◽  
Damping Capacity ◽  
Eurocode 8 ◽  
Deformation Capacity ◽  
Benin City ◽  
Energy Absorbing

Ductility is the ability of a system to sustain large deformations beyond its yield point without breaking or failing. Eurocode 8 makes allowance for receipt of seismic forces using the damping capacity of ductile members. This allows for the absorption of energy and helps increase the amount of energy absorbed by ductile structures before failure. This paper investigates the maximum ductility locally sourced steel rebars in Benin City structure can sustain without damage by establishing parameters that influence ductility. Tensile tests were conducted for rebar sizes of 10 mm, 12 mm, and 16 mm diameters, which were sourced from three different vendors within Benin City, Nigeria. The strain-hardening ratio Stu/Sty, i.e. the ratio of tensile strength Stu to yield strength Sty, and the elongation at maximum tensile force Agt were investigated in order to determine plastic deformation capacity and the degree of ductility of these rebars. A numerical model – the modified Ramberg- Osgood and Rasmussen equations – was modified in order to predict the experimentally obtained ductility parameters of these locally sourced rebars. The model collaborates well with experiments and could be used to establish ductility parameters of local rebars. Also, ductility test results showed that strain hardening ratios and elongation were relatively low (Recommended strain hardening ratio of rebar for seismic design is 1.15) and this could result in reinforced concrete structures made with these rebar exhibiting moderate ductility, i.e. a moderate plastic deformation capacity which might not have sufficient energy absorbing capacity in events of large earthquakes.

Finite element analysis of plasticity behaviour of aluminium alloys in high-pressure torsion compressive loading stage

2019 ◽  
Vol 10 (5) ◽  
pp. 692-703
Author(s):  
Fauziana Lamin ◽  
Ahmad Kamal Ariffin Ahmad Kamal Ariffin ◽  
Intan Fadhlina Mohamed
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
High Pressure ◽  
Plastic Strain ◽  
Aluminium Alloys ◽  
Material Flow ◽  
High Pressure Torsion ◽  
Compressive Loading ◽  
Content Type ◽  
Compression Stage

Purpose The purpose of this paper is to examine the plasticity behaviour of aluminium alloys in high-pressure torsion (HPT) compressive loading stage. It is a part of the strengthen lightweight material development through severe plastic deformation. Design/methodology/approach A finite element simulation of HPT compression stage by displacement control incremental loading was proposed by taking into account an unconstraint HPT configuration. The quasi-static condition was utilised, by embedding strain hardening plasticity constitutive model and considering frictional effects, to assess the plasticity behaviour of aluminium alloys, particularly AA2024 and AA6082. Findings The present investigation clearly indicates that the deviation of material flow as a result of sticking condition of µ⩾0.5, was found to be negligible. An inhomogeneous material flow along the sample radial and thickness direction was evident, producing a stress concentration at the edge of the loaded surface, indicating the anticipated region of failure. The effective plastic strain in the compression stage was also found to be significant. Based on the effective strain response, plasticity behaviour of the compressed sample was predicted. Originality/value This paper demonstrates the plasticity behaviour of the analysed aluminium alloys. Since the mechanical properties produced by the deformed material are closely related to the exerted plastic deformation, understanding the phenomenon associated with the plastic strain development is essential. The outcome of this research will assist in seizing the opportunities of improving both material properties and the HPT procedures.

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