Material Response: Constitutive Models and Their Implementation

2018 ◽  
pp. 363-436
Author(s):  
M. Okereke ◽  
S. Keates
Keyword(s):  
Constitutive Models ◽  
Material Response

Application of Advanced Constitutive Models to the Simulation of Machining

2009 ◽  
Author(s):  
David A. Miller ◽  
Cameron K. Chen
Keyword(s):  
Elevated Temperatures ◽  
High Strain ◽  
Plastic Material ◽  
Constitutive Models ◽  
Surface Damage ◽  
Machining Process ◽  
Material Response ◽  
Tension And Compression ◽  
Split Hopkinson ◽  
Constitutive Parameters

Advanced constitutive models have long been used to describe plastic material response at high strains and high strain rates. These models include the Johnson-Cook, Zerrelli-Armstrong and Material Threshold Stress (MTS) formulations, each with a separate fidelity. The constitutive parameters for these complex models are commonly identified using laboratory techniques such as quasi-static load frames at room and elevated temperatures, Split Hopkinson Pressure Bars (SHPB) in tension and compression, gas guns, and Taylor impact cylinders. However, while the models are able to adequately describe material response under high strain and high strain rate, the loadings are all uniaxial in nature. The ability of these constitutive models and parameters to describe a different dynamic loading event, namely shear dominated machining, has not been thoroughly investigated. This work will develop numerical simulations applying multiple constitutive models with material parameters experimentally determined for fully annealed copper samples. Ultimately, the machining simulation will be compared with high fidelity experimental machining data. The utility of this research extends to the fundamental questions that surround the machining process, such as tool forces, surface damage, precision and quality.

Assessment of two different constitutive models in High Speed Forming

2019 ◽  
Author(s):  
Andrey Brezolin ◽  
Tiago dos Santos ◽  
Pedro Rosa ◽  
Evandro Paese ◽  
Martin Geier ◽  
...  
Keyword(s):  
High Speed ◽  
Constitutive Models ◽  
High Speed Forming

Responsive Architecture and the Problem of Obsolescence

2014 ◽  
Vol 8 (3) ◽  
pp. 95 ◽  
Author(s):  
Mark Meagher
Keyword(s):  
Computer Science ◽  
Digital Information ◽  
Material Response ◽  
Responsive Architecture ◽  
History Of ◽  
The One

Responsive architecture, a design field that has arisen in recent decades at the intersection of architecture and computer science, invokes a material response to digital information and implies the capacity of the building to respond dynamically to changing stimuli. The question I will address in the paper is whether it is possible for the responsive components of architecture to become a poetically expressive part of the building, and if so why this result has so rarely been achieved in contemporary and recent built work. The history of attitudes to- ward obsolescence in buildings is investigated as one explanation for the rarity of examples like the one considered here that successfully overcomes the rapid obsolescence of responsive components and makes these elements an integral part of the work of architecture. In conclusion I identify strategies for the design of responsive components as poetically expressive elements of architecture.

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