Mr. M.R. Shiva Kumar M E, MISTE


Department of Industrial Engineering and Management

M S Ramaiah Institute of Technology

M S R Nagar, Bangalore-560054









Composites are ideal materials for structural applications where high strength-to-weight and high stiffness-to-weight ratios are desirable. Aircraft and spacecraft are typical weight -sensitive structures in which composite materials are cost-effective and finding increasing applications.


Ceramic matrix composites (CMCs) are an important class of composite materials and provide as alternative substitutes for conventional engineering materials when specific mechanical properties necessary for high /ambient temperature applications are desirable. Apart form possessing high strength to weight ratio  and high stiffness to weight ratio, they offer elevated temperature  stability, low thermal conductivity , etc., which improve their performance characteristics.


A Successful application of CMCs in engineering design requires a detailed characterization of their mechanical and thermal properties. The mechanical properties, in particular the elastic moduli play an important role in determining the mechanical stresses that these components (made of CMCs) will experience during service conditions.


Fiber –reinforced ceramic matrix composites are being developed to withstand stress levels in excess of the stresses at which matrix cracks form. It is expected that these components made of CMCs will have matrix cracking in regions of high stress concentration. Since matrix cracking changes the effective elastic moduli, the mechanical stresses induced in the component will be affected.


Exact solutions have been proposed by different researchers for the effective elastic moduli for CMCs with matrix cracks based on elasticity approach and making some simplifying assumptions. Simplifying assumptions will dilute the quality of the predicted results and pose a question on the accuracy of the subsequently calculated mechanical stresses using the effective elastic moduli.


The objective of the present work is to make a more accurate evaluation of the effective elastic moduli for a fiber –reinforced CMC by taking into account the effects of matrix cracking using finite element techniques. The front –end commercial software ANSYS will be adopted in the current investigation.


Some important results of the research investigations:


                                               Figure 1: UY-Displacement contours

Figure 2: Normalized elastic modulus as function crack density for 30% fiber volume fraction




1.     M.E (Manufacturing science and engineering) from University Visvesvaraya College of Engineering, Bangalore University, Bangalore 560 001.

2.     B.E. (Mechanical) from P E S College of Engineering, Mandya, Mysore University.


Professional Experience:


1.     Presently Working as lecturer in M S Ramaiah Institute of Technology since August 2005

2.     Worked as lecturer in The Oxford College of Engineering for two years.

3.     Worked as lecturer in NSVK Polytechnic for eight years.


Subjects Taught:


* Engineering Graphics               

* Machine Drawing

* Mechanical Engineering Science

* Manufacturing process             

* Basic thermodynamics

* Applied thermodynamics

* Kinematics of machine

* Dynamics of Machines

* Fluid mechanics               




1. R. Shankara Reddy, M R Shiva Kumar and K S Shivakumar Aradhya “Evaluation Of Effective Elastic Modulus For Fiber Reinforced Ceramic Matrix Composite Without Cracks Using FEM”. Proc., Of National Conference On Advances In Mechanical Engineering Sciences, “Nacames-2004”, Sept. 2004, Sri Siddhartha Institute Of Technology, Tumkur.


2. R Shankara Reddy, M R Shiva Kumar and K S Shivakumar Aradhya Evaluation Of “Effective Elastic Modulus For Fiber Reinforced Ceramic Matrix Composite With Cracks Using FEM”. 27-30, Dec. 2004, Proc., Of 49th Congress Of The Indian Society Of Theoretical And Applied Mechanics, An Inter National Meet, “ISTAM-2004”, National Institute Of Technology.


3. R Shankara Reddy, M R Shiva Kumar and K S Shivakumar Aradhya Evaluation Of “Effective Coefficient Of Thermal Expansion For Fiber Reinforced Ceramic Matrix Composite With Cracks Using FEM”. Proc., of International conference on Total Engineering Technologies, “TEAM TECH-2004”, 2 - 4, Nov. 2004, IISc, Bangalore.


Contact Details:


Home: # 506/A, 2nd cross, 2nd Main, Nagendra Block, BSK - 1st Stage, Bangalore -560 050, India


Phone: 080-23600822, 080-2360934 (Ext: 322) Mobile: 984410521



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