Accident reconstruction is the scientific process of investigating, analyzing, and drawing conclusions about the causes and events during an accident, such as a vehicular collision or airplane accident. Firms such as Dalder Materials Consulting are employed to conduct in-depth collision analysis and reconstruction to identify the causes of collision and contributing factors in different types of collisions.
In the case of vehicular accidents, the roles of the role of the driver(s), vehicle(s), roadway and the environment are evaluated. The laws of physics and engineering principles such as the conservation of linear momentum, work-energy methods, and kinematics are the basis for these analysis and may make use of software to calculate useful quantities.
The accident reconstruction expert provides rigorous analysis that an expert witness such as Ed Dalder can present at trial. Accident reconstructions are done in cases involving fatalities, and when personal injury is involved. Results from accident reconstructions are also useful in developing recommendations for making roads and highways safer, as well as improving safety aspects of motor vehicle designs. These reconstructions are often conducted by or private consultants such as Dalder Materials Consulting.
Ed Dalder has applied his expertise to a variety of accident reconstruction cases. He has reconstructed the circumstances the failure of a fully-loaded stainless steel wine-shipping truck during high speed high- way operation. Ed Dalder served as a metallurgical expert witness involving a failure of flash-welded steel bars used in construction of several concrete beam highway bridges. He has also been the accident reconstruction expert witness for an accident reconstruction case that determined the root-cause for a tractor-trailer loaded with steel beams leaving the road down an embankment, resulting in the death of the owner-operator.
As an accident reconstruction expert witness, Ed Dalder has been called upon to present findings of an accident-reconstruction involving the failure of a heavily-loaded, heavy-duty truck that failed after a short period of normal usage, due to poor-quality repair-welds. Ed Dalder served as an accident reconstruction expert witness to determine the cause of continued failures by cracking in high-power-density laser welds in stainless steels.
When it came to supporting litigation between the U.S. Department of Energy and a structural steel fabricator, Ed Dalder was the metallurgical expert witness called to determine the cause for frequent occurrences of weld-cracking in large high-strength steel structures.