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Griffith

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I teach Materials Science to undergraduate engineering students. We devote 2 or 3 lectures on Fracture where we mainly introduce Griffith's formula and the stress intensity formula. I face a difficulty in reconciling the two which I would lke to present here.

The Griffiths equation gives the fracture stress s for a given crack size c:

s=sqrt[2 E g/ (p c)] (1)

The stress concentration formula gives the max stress at the crack tip as

s=s0 [1+2 sqrt (c/r)] (2)

damage mechanics

Hi , I am a working on a project of Continuum Damage mechanics in Composite . But I do not have much idea about Damage mechanics . I am getting lot of diffculites to understand this topic .

So please anyone let me know any basic literature, lecture notes where I can find all basic information about Damage mechanics .

Thanks in Advance,

Regards.

Cell mechanics workshop at University of Illinois with NSF fellowships

Apply for NSF fellowships to attend 1-week long workshop on cell mechanics, July 31-Aug 3, 2007.

Check outwww.ccm.uiuc.edu

Chris Pearce's picture

Computational Solid Mechanics Summer School: 26 Aug - 1 Sep 2007, Glasgow UK

Mathematical Modelling & Computational Methods in Solid Mechanics

26th August - 1st September 2007

University of Glasgow

Amit Acharya's picture

Does a radially expanding cylinder bend?

The Koiter-Sanders-Budiansky bending strain measure and a nonlinear generalization

We know from strength of materials that non-uniform stretching of fibers along the cross section of a beam produces bending moments. But does this situation necessarily correspond to a 'bending' deformation? For that matter, what do we exactly mean kinematically when we talk about a bending deformation?

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Review of a few "Unified" Viscoplasticity Models (Motivated by solder deformation)

I had prepared this document for a class project, the level is introductory and the selection of models is motivated by solder deformation, but I hope it is of some help. I have examined four models, proposed by Hart, Anand, Krempl and Busso. The document has 16 pages.

Thanks,
Dhruv

PS: This is a wonderful website!!!

Derivatives of the invariants of a tensor

When you first start learning finite deformation plasticity, you will run into a plastic flow rate$ \ensuremath{\boldsymbol{d}}_p$that can be derived from a flow potential$ \phi$such that

A general discussion on the undergraduate course on Strength of Materials

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Most departments of Mechanical Engineering, Civil Engineering, and Aerospace Engineering have a required course called variably "Strength of Materials", "Introduction to Solid Mechanics", etc. In most departments, the content of the coure is mainly about static, elastic deformation of rods, shafts, beams and columns. It might be a good idea to share your thoughts on this course.

Isochromatic of Mode II Crack Tip Stress Field

I am looking for a high resolution isochromatic photograph showing the
Mode II stress field around a stationary crack. Any help on

Seek for suggestions!

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我是武汉科技大学力学专业04级的本科生, 现在我也准备报考研究生了,力学的方向比较宽泛让人有些迷惑,不知道到底报考 哪个方向比较合适,比较能发挥自己的特长.

Method of Manufactured Solutions

Nowadays, we often use the tools of computational analysis in engineering design. For the results of such analyses to be believable, the tools that are used have to pass rigorous tests. There are two categories of tests involved:

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We must not forget to teach the fundamentals

Aninteresting blog discussionon the disappearance of fundamentals from teaching in Universities was brought to my attention. It serves as an interesting reminder that we who are educators in the University system must be ever vigilent in planning mechanics curricula and changes to curriculum. Should we be offering courses in the area of this month's jClub, "Nanomechanics"? Should we drop classical courses that have stopped being interesting to the majority of students (and thus attract low numbers)? Should we educate students explicitly in biomechanics without providing them a classical mechanics background? These are the questions we are likely to face in the next few years as change continues to sweep across the university system, especialy in the US but elsewhere as well. I believe that we as a community have a responsibility here to ensure that the high standards of the discipline are maintained through teaching of fundamentals and the passing along of these values to future generations!

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GEM4 Summer School on Cell & Molecular Mechanics in Biomedicine 2007 - NUS, Singapore

GEM4 Summer School 2007on Cell & Molecular Mechanics in Biomedicine (with a focus on Cancer)

25 June to 6 July 2007

lecture 17. Introduction to Computational Ductile Fracture

An overview of several approaches to computational fracture mechanics for ductile structural metals.

weight function for finding out the stress Intensity factors

Good evening Everyone,

I have some confusion regarding reference frame and origin point while dealing with concept of weight function in fracture mechanics.

Please check the attached file for complete details.

Regards,

Ratnesh khandelwal

Federico Bertoli's picture

Four node beam element

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Hello,

As part of a university assignement I have to develop a four node beam element capable to account for shear deformation and thermal loads. I have to perform static plus natural vibration modes analysis.

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Loading problems in simulate crack propagation with cohesive element

Hi all:

When I simulate a crack propagate along interface between film and substrate with cohesive element, different load-deflection curves of film were achieved when I applied load or displacement on film, respectively.I think it should achieve same results regardless which kind of load I selected.Please help me find what’s wrong with my simulation.

Ying Li's picture

爆炸力学的发展史

爆炸力学是力学的一个分支,它主要研究爆炸的发生和发展规律,以及爆炸的力学效应的利用和防护的学科。它从力学角度研究化学爆炸、核爆炸、电爆炸、粒子束爆炸(也称辐射爆炸)、高速碰撞等能量突然释放或急剧转化的过程,以及由此产生的强冲击波(又称激波)、高速流动、大变形和破坏、抛掷等效应。自然界的雷电、地震、火山爆发、陨石碰撞、星体爆发等现象也可用爆炸力学方法来研究。

i need ansys workbench drop test module tutorial

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hi all,

i need ansys 10 workbench drop test module tutorial for impact analysys.

if any one having it please send to me

drop test in ansys ls-dyna

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hi,

我是苏尼尔•库马尔,这是我的第一个字母this forum .

i am working on ansys-lsdyna drop test module , please if any one working on that module respond to me . i am dropping a aluminium block on to a rigid surface from 1.5m height , i need to get out put acceleration around (37000 m/s2) but i am getting too high as (250000 m/s2) in vertical direction at the time of impact .

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