Noboru Kikuchi

Noboru Kikuchi
University of Michigan, Toyota Central R&D Labs

Ph.D

About

333
Publications
47,783
Reads
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22,476
Citations
Citations since 2016
2 Research Items
8123 Citations
201620172018201920202021202202004006008001,0001,200
201620172018201920202021202202004006008001,0001,200
201620172018201920202021202202004006008001,0001,200
201620172018201920202021202202004006008001,0001,200
Additional affiliations
June 2015 - present
University of Michigan
Position
  • Roger McCarthy Professor Emeritus of Mechanical Engineering
April 2008 - present
Toyota Research Institute of North America
Position
  • Managing Director
July 2003 - present
Toyota Central Research & Development Laboratories
Position
  • CEO

Publications

Publications (333)
Preprint
Full-text available
Topology optimization methods have widely been used in various industries, owing to their potential for providing promising design candidates for mechanical devices. However, their applications are usually limited to the objects which do not move significantly due to the difficulty in computationally efficient handling of the contact and interactio...
Article
This paper presents a topology optimization method which is capable of designing both topology and orientation distribution of anisotropic composite material simultaneously. Topology optimization is a well established structural optimization framework which optimizes the material distribution, i.e. density, in a given design domain for maximum perf...
Article
SUMMARYA general topology optimization method, which is capable of simultaneous design of density and orientation of anisotropic material, is proposed by introducing orientation design variables in addition to the density design variable. In this work, the Cartesian components of the orientation vector are utilized as the orientation design variabl...
Article
Full-text available
In this paper a novel automated design procedure based on the integration of a full wave Finite Element Analysis (FEA) and a topology design method employing Sequential Linear Programming (SLP) is introduced. The employed topology design method is the Solid Isotropic Material with Penalization (SIMP) technique which is formulated as a general non‐...
Article
Full-text available
The need exists for robust and efficient optimal design methods for application to multibody systems, in which the components to be designed represent connections between large displacement, large rotation motions of the subsystems' bodies. A specific application is an occupant restraint systems, such as the Gunner Restraint System (GRS), in which...
Article
A concept of crash energy absorbing (CEA) lattice structure for an inflatable morphing vehicle body (Lee et al. 2008) has been investigated as a method of providing rigidity and energy absorption capability during a vehicular collision (Lee et al. 2007). A modified analytical model for the CEA lattice structure design is described in this paper. Th...
Conference Paper
Complex and computationally intensive modeling and simulation of real-world engineering systems can include a large number of design variables in the optimization of such systems. Consequently, it is desirable to conduct variable screening to identify significant or active variables so that a simpler, more efficient, yet accurate optimization proce...
Conference Paper
The topology optimization method is extended for the optimization of geometrically nonlinear, time-dependent multibody dynamics systems undergoing nonlinear responses. In particular, this paper focuses on sensitivity analysis methods for topology optimization of general multibody dynamics systems, which include large displacements and rotations and...
Conference Paper
Efficient and reliable sensitivity analyses are critical for topology optimization, especially for multibody dynamics systems, because of the large number of design variables and the complexities and expense in solving the state equations. This research addresses a general and efficient sensitivity analysis method for topology optimization with des...
Article
Full-text available
This paper presents structural topology optimization applied to the coupled magneto-structural problem. The design goals are to minimize mechanical compliance and to maximize total magnetic force. To calculate the compliance and magnetic force, coupled magneto-structural analysis is performed using the finite-element method. From the solution of a...
Article
This paper presents the design optimization of switched reluctance motors (SRMs). The design goals are high average torque, low torque ripple and low mass under the constrained phase current of SRMs. To achieve these goals, we design not only the geometries of SRMs using topology optimization, but also voltage on–off angles. The performance analysi...
Article
A two-scale thermo-mechanical model for porous solids is derived and is implemented into a multi-scale multi-physics analysis method. The model is derived based on the mathematical homogenization method and can account for the scale effect of unit cells, which is our particular interest in this paper, on macroscopic thermal behavior and, by extensi...
Article
At present, limited functional data exists regarding the application and use of biomechanical and imaging technologies for oral implant osseointegration assessment. The objective of this investigation was to determine the functional apparent moduli (FAMs) that could predict the dynamics of oral implant osseointegration. Using an in vivo dental impl...
Article
An innovative means for improving crashworthiness is to use tubes filled with a granular material to absorb energy during the process of a crash. In this research, the implementation of granular materials in the tubes placed at the front posts of automobiles for improved safety has been studied. Granular particles can create enormous friction throu...
Article
A finite element (FE) model with knee-thigh-hip (KTH) and lower-extremity muscles has been developed to study the potential effects of muscle tension on KTH injuries due to knee bolster loadings in frontal crashes. This model was created by remeshing the MADYMO human lower-extremity FE model to account for regional differences in cortical bone thic...
Conference Paper
Full-text available
The ability to design to design and manufacture materials with complex structure and novel material response offers the opportunity to consider the control of the dynamic response of structures. This problem is well suited for a multi-scale approach in which the material characteristics and material layout are considered as part of the structural a...
Article
In the I-bumper (inflatable bumper) concept [1], two explosive airbags are released just before the main body-to-body crash in order to absorb the kinetic energy of colliding vehicles. The release also actuates other components in the I-bumper, including a movable bumper and an energy absorption morphing lattice structure. A small explosive charge...
Article
The greatest demand facing the automotive industry has been to provide safer vehicles with high fuel efficiency at minimum cost. Current automotive vehicle structures have one fundamental handicap: a short crumple zone for crash energy absorption. This leaves limited room for further safety improvement, especially for high-speed crashes. Breakthrou...
Article
A Magic Cube (MQ) approach for crashworthiness design has been proposed in previous research [1]. The purpose of this paper is to extend the MQ approach to the blast protection design of a military vehicle system. By applying the Space Decompositions and Target Cascading processes of the MQ approach, three subsystem design problems are identified t...
Conference Paper
Full-text available
A Magic Cube (MQ) approach for crashworthiness design has been proposed in previous research [1]. The purpose of this paper is to extend the MQ approach to the blast protection design of a military vehicle system. By applying the Space Decompositions and Target Cascading processes of the MQ approach, three subsystem design problems are identified t...
Article
In the literature, phononic band gaps in periodic media are generated via two different means, namely, Bragg scattering and local resonances. In this paper, an alternative method is introduced, in which effective inertia of the wave propagation medium is amplified via embedded amplification mechanisms. A prototype two-dimensional mass-spring lattic...
Article
In this paper, we present an application of the homogenization method to the analysis of Resin Transfer Molding (RTM) and Structural Reaction Injection Molding (SRIM). RTM and SRIM are relatively new molding processes for manufacturing continuous fiber reinforced polymer composites. First, the mold flow is analyzed. In the molding process, the resi...
Article
The design of compliant mechanisms poses certain unique challenges because such mechanisms should have adequate flexibility to undergo desired deformations under the action of applied forces and adequate stiffness to withstand external loading. The focus here is to generate the topology of a compliant mechanism starting from input/output force/disp...
Conference Paper
In this research, the rollover simulation for military vehicle, HMMWV (High Mobility Multi-purposed Wheeled Vehicle), is performed using commercial software ADAMS. Two rollover test procedures, J-turn and Fishhook, are simulated following NHTSA rollover test report with the variation of the vehicle speed and the design variables — the stiffness of...
Conference Paper
An innovative means for improving crashworthiness is to use tubes filled with a granular material to absorb energy during the process of a crash. In this paper, we will study how to use granular materials in the tubes found in the front posts of automobiles for improved safety. The focus will be on a specific design of tubes filled with a granular...
Conference Paper
The authors have studied a crash energy absorbing (CEA) truss structure with a locking mechanism to provide rigidity and energy absorption capability during a vehicular. In this paper, we focus on the analytic model of the CEA structure. An analytical model for the CEA truss structure design will be developed. The proposed CEA structure is composed...
Article
For mechanical structural design, topology optimization is often utilized. During this process, a topologically optimized model must be converted into a parametric CAD solid model. The key point of conversion is that a discretized shape of a topologically optimized model must be smoothed, but features such as creases and corners must be retained. T...
Article
A multidomain topology optimization technique (MDTO) is developed, which extends the standard topology optimization method to the realm of more realistic engineering design problems. The new technique enables the effective design of a complex engineering. structure by allowing the designer to control the material distribution among the subdomains d...
Article
Full-text available
Tire-induced noise and vibration spans a wide range of frequencies, depending on, among other attributes, tread design, road surface, and vehicle speed. Vehicle designers are faced with the daunting task of minimizing this broad frequency of energy. The design of suspension systems must take into account the need to have a well-tuned frequency resp...
Article
The aim of this paper is to design stiff and lightweight uniaxial passive vibration isolators that have low stop-band frequency. In order to make fair comparisons, stop-band frequencies of various isolator designs are formulated in a general framework. Two new n-degree-of-freedom (n-dof) isolator designs are introduced. The first design has n-1 ant...
Article
Full-text available
This paper provides, through both numerical analyses and physical tests, a validation of the optimality of structural designs obtained from a topology optimization process. Issues related to the manufacturability of the topology-optimized design are first addressed in order to develop structural specimens suitable for experimental validation. Multi...
Article
The aim of this paper is to design a stiff and lightweight passive vibration isolator that has wide stop-band at low frequencies. First of all, bandwidths of single-degree-of-freedom (sdof) dynamic vibration absorbers and lever-type anti-resonant vibration isolators are formulated in a general framework. Then, by making use of these formulations, a...
Article
Full-text available
http://deepblue.lib.umich.edu/bitstream/2027.42/5997/5/bab1485.0001.001.pdf http://deepblue.lib.umich.edu/bitstream/2027.42/5997/4/bab1485.0001.001.txt
Article
Full-text available
A new method, different from common eigenvalue extraction methods, was proposed by Li and Kikuchi (in 8th ARC conference, 2002). It consists of explicit finite-element method and eigenvalue-extraction method in time domain. Even though the new method performs well in extracting eigenvalues, it is difficult to identify global modeshape of the given...
Article
A new mixed shell element is developed for a seven-parameter formulation in this paper. The mixed shell element is constructed by assuming stress field and displacement field together. Assumed stress field and assumed displacement field can be combined by stress–strain relationship with Hu-Washizu functional. The developed mixed shell element can p...
Article
Full-text available
In this paper, the design of a thermophotovoltaic (TPV) filter with high-pass characteristics is presented. The filter is in the form of a frequency selective structure (FSS) with cascaded inhomogeneous dielectric substrates. The goal is to allow for more design flexibility using dielectric periodic structures to deliver a sharper filter response....
Article
Full-text available
In this paper a novel design procedure based on the integration of full wave Finite Element Analysis (FEA) and a topology design method employing Sequential Linear Programming (SLP) is introduced. The employed design method is the Solid Isotropic Material with Penalization (SIMP) technique formulated as a general non-linear optimization problem. SL...
Article
A multi-domain and multi-step topology optimization approach is presented in this paper, which can be used to simplify the architecture/topological structure of an "optimum" structure obtained from the topology optimization process, and thus significantly improves the manufacturability of the final design. Examples will be given to illustrate how t...
Article
Thermal transducers, which can be regarded as thermally actuated compliant mechanisms, have found a wide range of applications, due to easy accessibility of heat source, and due to their good controllability and reliability. During the past decade topology optimization techniques have been developed as efficient tools to design distributed complian...
Article
An often-proposed tissue engineering design hypothesis is that the scaffold should provide a biomimetic mechanical environment for initial function and appropriate remodeling of regenerating tissue while concurrently providing sufficient porosity for cell migration and cell/gene delivery. To provide a systematic study of this hypothesis, the abilit...
Article
In FOA (First Order Analysis) any vehicle body structure might be interpreted as a collective simple structure that can be decomposed into 3 fundamental structure types. The first structure is the "BEAM", whose cross sectional properties as well as its material dominates the mechanical behavior, the second is the "PANEL (shear panel, plate, and she...
Conference Paper
Computer Aided Engineering (CAE) has been successfully utilized in automotive industries. CAE numerically estimates the performance of automobiles and proposes alternative ideas that lead to the higher performance without building prototypes. Most automotive designers, however, cannot directly use CAE due to the sophisticated operations. In order t...
Conference Paper
We have developed new CAE tools in the concept design process based on First Order Analysis (FOA). Joints are often modeled by rotational spring elements. However, it is very difficult to obtain good accuracy. We think that one of the reasons is the influence of the nonlinear behavior due to local elastic buckling. Automotive body structures have t...
Article
Full-text available
The manufacturability of composite material microstructures designed by the homogenized topology optimization method has to be considered when bringing the design into reality. In this paper, numerical studies are conducted on multiphase material microstructures that have negative coefficients of thermal expansion, for the purpose of improving manu...
Article
The homogenization method has been used often in analyzing the composite materials but has had limited use with the laminated structures. This is due to a limitation of the homogenization theory, which assumes the unit cell should be periodically represented in any specific area. The main attraction of the homogenization method is its systematic ca...
Article
The objective of this research is to develop a new methodology with software tools for the joint design of an advanced composite armor (ACA) under ballistic impact and other loading conditions. An innovative design methodology, topology optimization, is extended for the composite armor joint design problem. This includes ballistic impact analyses o...
Article
This paper summarizes a new capability in the topology optimization, which employs an advanced substructuring technique in the multi-domain topology optimization for the purpose of designing a complex and practical mechanical system. In the substructuring method, a structural system is divided into a series of substructures, which can be designed s...
Article
Full-text available
Most literature studies dealing with design optimization for RF applications focused to a large extend on size and shape optimization. So far, material and topology optimization has not been pursued primarily due to the challenges associated with the fabrication of inhomogeneous materials and the limited access to analysis tools. In this paper, we...
Conference Paper
Full-text available
Printed antennas suffer from narrow bandwidth and large size as the frequency is lowered. A novel design procedure based on the integration of full wave FEA and the SIMP design method (Sigmund, O. Computer methods in applied mechanics and engineering, vol.190, p.6577-604, 2001) employing sequential linear programming for the optimization was introd...
Article
When structures may have dynamic instability complex eigenvalue analysis is a useful tool to predict it. Although the accurate prediction itself is significant, it is also crucial to obtain sensitivity of unstable eigensolutions in order to eliminate instability efficiently. Since the mathematical relationship between stiffness matrix and design va...
Article
Quest for a material to suit the service performance is almost as old as human civilization. So far materials engineers have developed a series of alloys, polymers, ceramics, and composites to serve many of the performance requirements in a modern society. However, challenges appear when one needs to satisfy more than one boundary condition. For ex...
Article
The objective of this research is to verify the optimum design obtained from a topology optimization process. The verification is through both numerical analysis and physical test. It will be shown that the optimum topology obtained from an example topology optimization process is independent of the material used and the dimension/size of the struc...
Conference Paper
The optimization problem for the brake squeal noise consists of a complex-valued objective function (COF) and physical design variables (PDV). A direct solution has been hampered by many unknowns between the COF and PDV. Nonetheless, an optimal solution is possible if the problem is separated into two steps. In the first step, sensitivity analysis...
Conference Paper
A systematic approach, referred to as function-oriented material design (FOMD), is presented in this paper, which can be used to design materials for the specific tasks demanded of structures in future ground vehicle systems. In order to carry out the FOMD process, first the functions of a structure in the vehicle system need to be explicitly defin...
Article
In this paper a novel design procedure based on the integration of full wave FEA and a topology design method employing SLP for the optimization is introduced. The employed design method is the Solid Isotropic Material with Penalization (SIMP) technique formulated as a general nonlinear optimization problem. Sequential Linear Programming (SLP) is u...
Article
Existing studies in the literature dealing with design optimization for RF applications focused to a large extend on size and shape optimization. So far, material and topology optimization has not been pursued primarily due to the challenges associated with the fabrication of inhomogeneous materials and the limited access to versatile and efficient...
Article
We apply the homogenization design method (HDM) to reduce the vibration level of a structure excited by magnetic harmonic force. We do this by obtaining the optimal material distribution of the structure to minimize the frequency response. We first use the Maxwell stress method to compute the magnetic force and then apply HDM for the optimization....
Article
In order to quickly obtain qualitative designs, a new concept of CAE, First Order Analysis (FOA) is proposed. The basic ideas include (1) graphic interfaces, (2) use of sophisticated formulations based on the theory of mechanics of material, (3) the topology optimization method. The key idea of topology optimization is based on the ground structure...
Article
Computer Aided Engineering (CAE) has been successfully utilized in mechanical industries such as the automotive industry. It is, however, difficult for most automotive design engineers to directly use CAE due to the sophisticated nature of the operations involved. In order to mitigate this problem, a new type of CAE, First Order Analysis (FOA) has...
Article
Thermal transducers, which can be interpreted as thermally actuated compliant mechanisms, have found a wide range of applications, due to the reason of accessible source, easy controllability and reliability. During the past decade topology optimization techniques have been developed as efficient tools to design distributed type of complaint mechan...
Article
Disassembly is a fundamental process needed for component reuse and material recycling in all assembled products. Integral attachments, also known as "snap" fits, are favored fastening means in design for assembly (DFA) methodologies, but not necessarily a favored choice for design for disassembly. In this paper, several protorype designs of a new...
Conference Paper
Numerical investigation of Stefan problem is conducted. The method developed is a combination of front tracking method and fixed domain method by finite element method. The fixed entire domain is applied to a melting/solidification problem by finite element method without depending on enthalpy formulation. The moving front is tracked by level set m...
Conference Paper
Full-text available
We use the density/SIMP (solid isotropic material with penalization) method to design metamaterials for frequency selective surfaces/volumes. It is shown that significant improvement is attained by optimization of the material permittivity. The generality, low number of iterations and the simplicity of the demonstrated approach motivate application...
Conference Paper
Full-text available
Ceramic dielectric and magnetic composite metamaterials fabricated using indirect three-dimensional printing techniques and by a thermoplastic extrusion.