Static Stress & Deformation
Linear static assessment of components and assemblies for stress, displacement, stiffness, reactions and safety margin under defined operating, handling or test loads.
Finite element analysis & structural validation
Structural & StressAnalysis Services
Static and nonlinear structural analysis for machinery, equipment frames, weldments, bolted assemblies and load bearing components. Fabrixon builds the model around realistic loads, restraints and interfaces, then interprets the results against a defined engineering decision.
Loads & restraintsStress & deformationStability & contactReports & design actions
Structural evidence for design decisionsSee what is driving stress, deformation and structural margin before the design moves forward.Defined assumptions. Interpreted behaviour. Clear evidence for the next engineering decision.
50+ Years
Combined Experience
Mechanical design, structural behaviour, FEA, validation and technical reporting
60+
Projects Delivered
Structural analysis programmes acrossmachinery, frames, weldments, joints andload bearing components
6
Core Analysis Capabilities
Static, frames, joints, buckling, nonlinear response and controlled design comparison
4
Analysis Stages
From engineering question and load basis through interpreted evidence and controlled handover
Structural analysis capabilities
Structural behaviourwe analyse
From a single load bearing component to a fabricated machine frame or nonlinear assembly, the model is built around the real load path, interfaces, material behaviour and the decision the analysis must support.
Defensible structural validation
One analysis basis from loaddefinition to design action
Loads, restraints, materials, contacts and acceptance criteria stayconnected as model fidelity increases. Mesh refinement, sensitivity checksand engineering interpretation are applied where they can changethe conclusion, not simply to create a more detailed contour plot.
Question·Load basis·Model·Sensitivity·Interpretation·Design action
Weldments & Fabricated Frames
Structural assessment of machinery frames, chassis, supports and fabricated assemblies, including global load path, local plate behaviour, reactions and critical joints.
Bolted Joints & Contact
Fastener forces, preload assumptions, separation, slip, bearing and contact pressure where joint and interface behaviour governs the assembly response.
Buckling & Stability
Eigenvalue screening and, where justified, nonlinear stability assessment for compression loaded members, plates, panels and shells.
Nonlinear Static Analysis
Large deflection, changing contact or material plasticity where linear assumptions no longer represent the governing structural behaviour.
Design Comparison & Improvement
Controlled comparison of geometry, thickness, material, stiffeners and joint arrangements using the same load basis so design changes can be judged consistently.
Common validation risks
Where structural decisions get stuck
Structural FEA creates value when it resolves a real design, release or failure question. These are the situations where a defensible model and clear engineering interpretation matter most.
Loads and restraints are not defensible
Forces may be inherited, estimated or applied without a traceable connection to equipment duty, supports, interfaces and credible operating cases.
The FEA plot looks convincing, but the model basis does not
Constraints, contacts, mesh density or local singularities can dominate the result without representing the physical structure.
Prototype behaviour disagrees with the prediction
Cracking, distortion or excessive movement can expose a missed load path, stiffness issue, interface condition, joint response or instability mode.
A reviewer needs evidence, not screenshots
Technical and compliance reviews need a traceable question, assumptions, model basis, sensitivity, interpretation, limitations and design action.
Engineering approach
How we build adefensible analysis
The solver is only one part of the work. The analysis method is selected around the structural decision, with model detail increased only where it can materially change the conclusion.
Frame the engineering question
Define the concern, operating and exceptional cases, acceptance criteria, required evidence and the decision the analysis must support.
Establish the model and load basis
Review geometry, material data, supports, contacts, fasteners, load origin, simplifications and any inputs that still require confirmation.
Build a proportionate model
Choose element type, idealisation, joint representation and linear or nonlinear treatment to match the governing behaviour without unnecessary complexity.
Check sensitivity and governing behaviour
Review mesh stability, reactions, load path, local peaks, deformation, contact and assumptions that can change the engineering conclusion.
Interpret and issue the design action
Connect the results to the acceptance basis, explain limitations and provide the recommended change, comparison or release decision under controlled revision.
Selected structural work
Analysis appliedto real designdecisions
Representative projects showing structural validation, FEA led redesign and load path assessment across trailers, heavy equipment and instrumented mechanical products.
Structural & Stress Analysis
Gantry Machine FEA Validation and Structural Optimization
Case study showing how structural FEA, physical stiffness testing and optimization were combined to identify flexible machine regions and guide a lighter, better supported redesign.
View case studyStructural & Stress Analysis
Spoon Hitch Structural Redesign
Geometry iteration and repeat static FEA reduced the reported peak stress by 48% within fixed hitch interfaces.
View case study
Structural & Stress Analysis
Gooseneck Trailer Chassis Static FEA
Static FEA of an OEM supplied gooseneck chassis with documented load assumptions, mesh refinement and design release evidence.
View case studyAnalysis reporting
Reports that withstand technical scrutiny
A contour plot is not a technical conclusion. The review must let another engineer trace the question, model basis, sensitivity, interpretation and recommended action and understand what the analysis does and does not establish.
Loads, restraints and assumptions
Geometry idealisation, material data, load origin, constraints, contacts, acceptance criteria and open assumptions are recorded rather than left implicit.
Mesh, sensitivity and physical interpretation
Critical values are interpreted against the surrounding field, mesh sensitivity, load path and model limitations so a numerical peak is not mistaken for a physical failure.
Conclusions without overstating certification
The report can support client and compliance review, but it does not by itself certify the product. Review authority, specialist code checks and remaining validation responsibilities stay explicit.
Typical deliverables
A controlled structural analysis package
The package is defined around the structural question, agreed load cases, model fidelity, acceptance basis and next design action so assumptions, solver evidence, conclusions and revisions remain connected.
Analysis basis · solver model · results · recommendations · controlled report
Controlled Analysis Report
Revision controlled record of the engineering question, model basis, results, limitations, conclusions and recommended actions.
Load, Constraint & Assumption Register
Operating and exceptional loads, support conditions, combinations, source information, acceptance criteria and open inputs requiring confirmation.
Geometry, Material, Contact & Mesh Record
Model idealisation, material properties, joint and contact treatment, element selection, local refinement and sensitivity evidence relevant to the conclusion.
Stress, Deformation & Stability Evidence
Critical plots, values, locations, reactions, contact or buckling behaviour and the engineering interpretation that governs the decision.
Design Comparison & Recommended Actions
Variant comparison, recommended geometry or joint changes, remaining risks and the evidence supporting the selected direction.
Native Model & Review Material
Agreed solver files, result extracts, animations, review images and controlled issue records where included in the work package.
Analysis workflow
How a structuralanalysis runs
A four stage workflow keeps the engineering question, model basis, sensitivity and next design action visible without turning the analysis into a black box solver exercise.
Frame the decision
Confirm the concern, operating cases, acceptance criteria, required evidence and the decision the analysis must support.
Set the model & load basis
Review geometry, materials, interfaces, supports, contacts, load origin, simplifications and missing inputs before solving.
Solve & check sensitivity
Apply the appropriate linear, contact, buckling or nonlinear method, then review mesh stability, reactions, local peaks and governing behaviour.
Report the design action
Issue controlled evidence, limitations, design comparison and the recommended change or review decision within the agreed responsibility route.
Buyer questions
Structural analysis FAQ
Direct answers to the technical and commercial questions that usually determine whether a structural FEA scope can be defined correctly.
What is included in structural and stress analysis?
The scope can include linear static stress and deformation analysis, safety margin assessment, weldment and frame analysis, bolted connection and contact assessment, buckling screening, nonlinear static analysis and comparison of design alternatives. The work package records the geometry basis, materials, loads, constraints, mesh strategy, assumptions, results, limitations and recommended design actions.
What information is needed to start a structural FEA?
Useful starting information includes a 3D model or drawings, material grades, operating and exceptional loads, mounting and support conditions, contact or fastener details, relevant standards, target safety factors or allowable limits and the design decision the analysis must support. Fabrixon identifies missing inputs during the initial model review.
How are loads and boundary conditions defined?
Loads and constraints are derived from the real equipment duty, load path, supports, interfaces and operating sequence. The model records where each load originates, how it is distributed, which degrees of freedom are restrained and which simplifications have been made. Where the load basis is uncertain, sensitivity cases can be used to show how the conclusion changes.
How do you check mesh convergence and whether peak stress is meaningful?
Mesh refinement is concentrated where geometry, contact or load transfer makes the result sensitive. Fabrixon reviews element quality, result stability and the behaviour of stress through the surrounding region. A local peak caused by a sharp corner, point load or idealised restraint is not treated as a physical failure without engineering interpretation.
Can Fabrixon analyse weldments, bolted joints and contact?
Yes. Welded frames, fabricated assemblies, bolted connections and contact interfaces can be included where the available geometry and input data support the required model. The analysis may consider global frame behaviour, local plate stress, support reactions, bolt forces, preload assumptions, separation, slip, bearing and contact pressure. Detailed weld or fastener code checks are defined separately where required.
Can structural FEA support compliance or certification?
FEA can provide documented engineering evidence for design reviews, client requirements and defined compliance submissions, but an analysis report does not by itself certify a product. The applicable code basis, acceptance criteria, design responsibility and review authority must be agreed before work begins. Pressure equipment and other specialist code scopes are considered only when the required code route and suitably qualified review are clearly defined.
How much does structural analysis cost and how long does it take?
Cost and duration depend on model quality, number of load cases, contact and joint complexity, material behaviour, mesh sensitivity, nonlinear requirements, acceptance criteria, redesign cycles and reporting depth. A defined component with clear inputs may be assessed quickly, while a large assembly or nonlinear model requires a staged programme. Scope, assumptions, programme and commercial basis are confirmed before analysis begins.
Start with the engineering question
Resolve the Structural Risk Before the Design Moves Forward
Share the model, load information, material data, support conditions and the concern that must be resolved. Fabrixon will review the starting point and define the analysis route, missing inputs and evidence needed for a defensible conclusion.
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