Failure modes and probability of failure of high strength steel rocket motor cases

1981 ◽  
Author(s):  
J. MARGETSON
Keyword(s):  
High Strength Steel ◽  
Failure Modes ◽  
High Strength ◽  
Probability Of Failure ◽  
Rocket Motor

scholarly journals Development of 210kgf/mm2 grade ultra-high strength steel for rocket motor cases.

1986 ◽  
Vol 25 (6) ◽  
pp. 550-552
Author(s):  
A. Matsuzaki ◽  
S. Sato ◽  
T. Okumura ◽  
S. Shono ◽  
H. Okazaki
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Rocket Motor ◽  
Ultra High Strength Steel

Hysteretic Behavior of Composite Vertical Connection Structures used in Prefabricated Shear Wall Systems

2020 ◽  
Vol 20 (06) ◽  
pp. 2040007
Author(s):  
Limeng Zhu ◽  
Haipeng Yan ◽  
Po-Chien Hsiao ◽  
Jianhua Zhang
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
High Strength Steel ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Shear Walls ◽  
High Strength ◽  
Shear Wall ◽  
Hysteretic Behavior ◽  
Design Standards

An innovative composite vertical connecting structure (CVC) with capacity carrying and energy-dissipating ability is proposed in this study, which could be used in prefabricated composite shear wall structural systems to enhance the resilience and seismic performance of structural system. The CVC structure is mainly composed of three parts, including the connecting zone, the capacity bearing zone characterized by high strength and elastic deforming ability, and the energy-dissipating zone assembled by replaceable metal dampers. The low-yield strength steel and high-strength steel are used, respectively, for the metal dampers in the energy-dissipating zone and the concrete-filled high-strength steel tubes in the bearing capacity zone to enhance the energy dissipation and self-centering abilities of CVC structures. The working mechanism is analyzed and validated through finite element models built in ABAQUS. The hysteretic behavior is simulated to evaluate their performance. First, the metal dampers are designed. The theoretical and finite elemental parametric analysis are carried out. According to the simulation results, the “Z-shaped” metal dampers exhibit better energy-dissipating ability than the rectangular shape, in which the “Z-shaped” metal dampers with 45∘ show the best performance. Simultaneously, the results of the models calculated by the finite element method and theoretical analysis work very well with each other. Furthermore, seven FE models of shear walls with CVC structures are designed. Monotonic and cyclic loading simulations are conducted. The failure modes and comprehensive mechanical performance are investigated and evaluated according to their calculated force–displacement curves, skeleton curves, and ductility coefficients. The results indicate that the CVC structure delivered preferable lateral-bearing capacity and displacement ductility. Finally, according to available design standards, the lateral stiffness of CVC structures could be conventionally controlled and some practical design recommendations are discussed.

scholarly journals Numerical study of concrete-filled austenitic stainless steel CHS stub columns with high-strength steel inner tubes

2018 ◽  
Author(s):  
Fangying Wang ◽  
Ben Young ◽  
Leroy Gardner
Keyword(s):  
Stainless Steel ◽  
High Strength Steel ◽  
Failure Modes ◽  
Numerical Study ◽  
High Strength ◽  
Reduction Factor ◽  
Fe Model ◽  
Structural Behaviour ◽  
Concrete Filled Tubes ◽  
Stub Columns

A numerical modelling programme simulating the structural behaviour of concrete-filled double skin tubular (CFDST) stub columns with stainless steel outer tubes and high strength steel inner tubes is presented in this paper. The numerical model, which was developed using the finite element package ABAQUS, was initially validated against existing experimental results considering ultimate load, load-deflection histories and failure modes, with good agreement observed. Upon validation of the FE model, an extensive parametric study was undertaken whereby the cross-section slendernesses of the outer and inner tubes, the strength of the inner tube and the concrete grades were varied. These generated results together with the experimental data were then employed to assess the suitability of the design provisions of the European Standard EN 1994-1-1 and American Specification for concrete-filled tubes. Modifications to these design rules are also proposed, and a reduction factor (η) is suggested to account for the effective compressive strength in high strength concrete. 

scholarly journals Seismic Behavior of RC Beam Column Joints with 600 MPa High Strength Steel Bars

2020 ◽  
Vol 10 (13) ◽  
pp. 4684
Author(s):  
Jian Feng ◽  
Shuo Wang ◽  
Marco Meloni ◽  
Qian Zhang ◽  
Jingwen Yang ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Axial Compression ◽  
High Strength Steel ◽  
Seismic Behavior ◽  
Failure Modes ◽  
High Strength ◽  
Longitudinal Reinforcement ◽  
Seismic Properties ◽  
Steel Bars ◽  
Energy Dissipation Capacity

This paper presents an experimental investigation of the seismic performance of interior beam–column joints with beams reinforced with Grade 600MPa longitudinal steel bars. Six full-scale reinforcement concrete (RC) interior joints are designed with different axial compression ratios and longitudinal reinforcement ratios, which are tested under reversed cyclic loading. Failure modes, hysteretic curves, skeleton curves, energy dissipation capacity, and the ductility of joints are investigated systematically. Moreover, the effect of the different axial compression ratios and longitudinal reinforcement ratios on the seismic behavior of the joints are deeply studied. Comparisons performed between specimens demonstrate that among the beam–column joints with 600 MPa high strength steel bars, specimens with high reinforcement ratios have better energy dissipation capacity, slower stiffness degradation, and lower ductility. Moreover, with the increase of the axial compression ratios, the energy dissipation capacity and ductility become weaker. The test results show the favorable seismic properties of beam–column joints equipped with 600 MPa high strength steel bars, which can be regarded as the research basis of the popularization and application of 600 MPa high strength steel bars in reinforcement concrete frame structures.

Experimental Study on Seismic Behavior of High Strength Steel Composite K-Type Eccentrically Braced Frames

2013 ◽  
Vol 838-841 ◽  
pp. 559-563
Author(s):  
Liu Sheng Duan ◽  
Ming Zhou Su ◽  
Hui Li
Keyword(s):  
High Strength Steel ◽  
Seismic Behavior ◽  
Cyclic Load ◽  
Failure Modes ◽  
High Strength ◽  
Eccentrically Braced Frames ◽  
Braced Frame ◽  
Eccentrically Braced Frame ◽  
Steel Composite ◽  
Energy Absorbing

High strength steel composite K-type eccentrically braced frame is a new structural system, in which the link is made from low yield point steel and the others are made from high strength steel. In order to study the seismic behavior of such a structure, four one-bay one-story 1/2 scaled plane specimens were tested under the monotonic and cyclic load respectively. The failure modes and the main indexes of seismic behavior of specimens with various links length were analyzed. The results show that this new structural form is good at energy dissipation and ductility, and the way of energy absorbing by shear yield is better than by flexure yield. Under cyclic load, the main failure were concentrated at links, while the other parts of the eccentrically braced frame kept in elastic status. This kind of structure is an excellent dual resistance system and easy to rehabilitate after earthquake.

Probabilistic Failure Prediction of High Strength Steel Rocket Motor Cases

2014 ◽  
Vol 14 (4) ◽  
pp. 478-490 ◽  
Author(s):  
A. Krishnaveni ◽  
T. Christopher ◽  
K. Jeyakumar ◽  
D. Jebakani
Keyword(s):  
High Strength Steel ◽  
Failure Prediction ◽  
High Strength ◽  
Rocket Motor
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